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Abstract This article aims to examine the effects of weekend admission on in-hospital mortality for patients with acute myocardial infarction (AMI) in Brazil. Information from the Hospital Information System of the Unified Health System (SIH/SUS) of urgently admitted patients diagnosed with acute myocardial infarction (AMI) between 2008 and 2018 was used, made available through the Hospital Admission Authorization (AIH). Multivariable logistic regression models, controlling for observable patient characteristics, hospital characteristics and year and hospital-fixed effects, were used. The results were consistent with the existence of the weekend effect. For the model adjusted with the inclusion of all controls, the chance of death observed for individuals hospitalized on the weekend is 14% higher. Our results indicated that there is probably an important variation in the quality of hospital care depending on the day the patient is hospitalized. Weekend admissions were associated with in-hospital AMI mortality in Brazil. Future research should analyze the possible channels behind the weekend effect to support public policies that can effectively make healthcare equitable.

Resumo O objetivo deste artigo é examinar os efeitos da internação no final de semana na mortalidade hospitalar de pacientes com infarto agudo do miocárdio (IAM) no Brasil. Foram utilizadas informações do Sistema de Informação Hospitalar do Sistema Único de Saúde (SIH/SUS) de pacientes internados em urgência com diagnóstico de infarto agudo do miocárdio (IAM) entre 2008 e 2018, disponibilizados por meio da Autorização de Internação Hospitalar (AIH). Foram usados modelos de regressão logística multivariada, controlando as características observáveis ​​do paciente, características do hospital e efeitos fixos de ano e hospital. Os resultados foram consistentes com a existência do efeito fim de semana. Para o modelo ajustado com a inclusão de todos os controles, a chance de óbito observada para indivíduos internados no final de semana é 14% maior. Nossos resultados indicaram que provavelmente existe uma variação importante na qualidade da assistência hospitalar dependendo do dia em que o paciente fica internado. Internações em finais de semana foram associadas à mortalidade por IAM intra-hospitalar no Brasil. Pesquisas futuras devem analisar os possíveis canais por trás do weekend effect para subsidiar políticas públicas que possam efetivamente tornar o atendimento equitativo.

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OBJECTIVE: To analyze the prevalence of no-reflow and the 30-day mortality in a university center in a middle-income country. METHOD: We analyzed 2463 patients who underwent primary PCI from January 2006 to December 2021. The outcome measure was 30-day mortality. RESULTS: Of a total of 2463 patients, no-reflow phenomenon was found in 413 (16.8%) patients, 30-day mortality was 16.7 vs. 4.29% (p < 0.001). Patients with no-reflow were older 60 (53-69.5) vs. 59 (51-66) (p = 0.001), with a higher delay in onset of symptom to emergency department arrival 270 vs. 247 min (p = 0.001). No-reflow patients also had had fewer previous myocardial infarction, 11.6 vs. 18.4 (p = 0.001) and a Killip class > 1, 37 vs. 26% (p < 0.001). No-reflow patients were more likely to have an anterior myocardial infarction (55.4 vs. 47.8%; p = 0.005) and initial TIMI flow 0 (76 vs. 68%; p < 0.001). CONCLUSION: No-reflow occurred in 16.8% of STEMI patients undergoing primary PCI and was more likely with older age, delayed presentation, anterior myocardial infarction and Killip class > 1. No-reflow was associated with a higher mortality at 30-day follow-up.

OBJETIVOS: Analizar la prevalencia de no reflujo y la mortalidad a 30 días en un centro universitario de un país de ingresos medios. MÉTODO: Analizamos 2,463 pacientes que se sometieron a ICP primaria desde enero de 2006 hasta diciembre de 2021. La medida de resultado fue la mortalidad a los 30 días. RESULTADOS: Del total de 2,463 pacientes, se encontró fenómeno de no reflujo en 413 (16.8%), la mortalidad a los 30 días fue del 16.7 vs. 4.29% (p < 0.001). Los pacientes sin reflujo tenían mayor edad 60 (53-69.5) vs. 59 (51-66) (p = 0.001), con mayor retraso del inicio de los síntomas a la llegada a urgencias, 270 vs. 247 min (p = 0.001). Los pacientes sin reflujo también tenían menos infarto de miocardio previo, 11.6 vs. 18.4 (p = 0.001), y una clase Killip > 1, 37 vs. 26% (p < 0.001). Los pacientes sin reflujo tenían más probabilidades de tener un infarto de miocardio anterior (55.4 vs. 47.8%; p = 0.005) y flujo TIMI inicial 0 (76 vs. 68%; p < 0.001). CONCLUSIÓN: Ocurrió ausencia de reflujo en el 16.8% de los pacientes con IAMCEST sometidos a ICP primaria y fue más probable con la edad avanzada, presentación tardía, infarto de miocardio anterior y clase Killip > 1. El no reflujo se asoció con una mayor mortalidad a los 30 días de seguimiento.

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Resumen El tratamiento del infarto agudo de miocardio con elevación del segmento ST tiene barreras dependiendo de la región geográfica. La angioplastia coronaria primaria es el tratamiento de elección, siempre y cuando sea realizada dentro de tiempo y por operadores experimentados. Sin embargo, cuando no está disponible, la administración de fibrinólisis y el envío para angioplastia de rescate, en caso de reperfusión negativa, es la mejor estrategia. De la misma manera, la angioplastia coronaria, como parte de una estrategia farmacoinvasiva, es la mejor alternativa cuando hay reperfusión positiva. El desarrollo de redes de tratamiento del infarto aumenta el número de pacientes reperfundidos dentro de los tiempos recomendados y mejora los desenlaces. En América Latina, los programas nacionales para el tratamiento del infarto deben centrarse en mejorar los resultados y el éxito a largo plazo depende de trabajar hacia objetivos definidos y obtener métricas de rendimiento, por lo tanto, estos deben desarrollar métricas para cuantificar su desempeño. El siguiente documento discute todas estas alternativas y sugiere oportunidades de mejora.

Abstract The treatment of ST-segment elevation myocardial infarction has barriers depending on the geographic region. Primary coronary angioplasty is the treatment of choice, if it is performed on time and by experienced operators. However, when it is not available, the administration of fibrinolysis and referral for rescue angioplasty, in case of negative reperfusion, is the best strategy. In the same way, coronary angioplasty, as part of a pharmacoinvasive strategy, is the best alternative when there is positive reperfusion. The development of infarct treatment networks increases the number of patients reperfused within the recommended times and improves outcomes. In Latin America, national myocardial infarction treatment programs should focus on improving outcomes, and long-term success depends on working toward defined goals and enhancing functionality, therefore programs should develop capacity to measure their performance. The following document discusses all of these alternatives and suggests opportunities for improvement.

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Resumen El diagnóstico electrocardiográfico de infarto agudo de miocardio (IAM) en el paciente con marcapasos siempre ha sido un problema en la práctica clínica, provocando retrasos en el manejo y peores desenlaces clínicos. Aunque el bloqueo completo de rama izquierda (BCRI) y la estimulación del ventrículo derecho pueden producir anomalías en el electrocardiograma (ECG), cambios morfológicos específicos a menudo permiten el diagnóstico de IAM o un infarto antiguo. Reporte de caso: Paciente de 76 años con antecedente de implante de marcapasos definitivo por bloqueo auriculoventricular de 3° grado, que ingresó por dolor precordial. A su ingreso hemodinámicamente estable, pero con ECG que muestra ritmo de marcapasos con BCRI cumpliendo Sgarbossa 2 puntos (elevación discordante del segmento ST > 5 mm en derivaciones V1 a V3) y relación ST/S < -0.25 en derivaciones V3-V4. Laboratorios con elevación de troponinas, integrándose diagnóstico de IAM y pasando a angiografía coronaria urgente. Se documentó lesión en arteria coronaria descendente anterior y se implantó stent liberador de fármaco angiográficamente exitoso. Se egresó estable, asintomático y con manejo farmacológico para prevención secundaria. Conclusión: La identificación por ECG de un IAM en pacientes portadores de marcapasos es fundamental para iniciar terapia de reperfusión. Las recomendaciones de las guías cambian constantemente, pero un algoritmo que utiliza la inestabilidad hemodinámica y los criterios de Sgarbossa modificados (CSM) para decidir el manejo de estos pacientes pudiera ser una herramienta con una alta sensibilidad y permitirá a los médicos tener la mejor toma de decisiones sin esperar resultados de laboratorio. Los CSM, que son más sensibles que los criterios originales, continúan siendo útiles en el diagnóstico de IAM. Los médicos deben elegir cuidadosamente el límite de CSM apropiado (relación ST/T -0.20 y -0.25) de acuerdo con cada caso.

Abstract The electrocardiographic diagnosis of acute myocardial infarction (AMI) in patients with pacemakers has always been a problem in clinical practice, causing delays in management and worse clinical outcomes. Although complete left bundle branch block (LBBB) and right ventricular pacing can produce electrocardiogram (ECG) abnormalities, specific morphological changes often allow the diagnosis of AMI or an old infarction. Case report: A 76-year-old patient with history of permanent pacemaker implantation due to a 3rd-degree atrioventricular block was admitted for chest pain. Upon admission, he was hemodynamically stable but with ECG showing pacemaker rhythm with LBBB fulfilling 2 points of Sgarbossa criteria (discordant elevation of the ST segment > 5 mm in leads V1 to V3) and ST/S ratio < -0.25 in leads V3-V4. Laboratories showed elevated troponins, integrating diagnosis of AMI, and moving on to urgent coronary angiography. A lesion on the anterior descending coronary artery was documented, and a drug-eluting stent was successfully implanted. The patient was discharged stable, asymptomatic, and with pharmacological management for secondary prevention. Conclusion: ECG identification of an AMI in patients with pacemakers is essential to initiate reperfusion therapy. Guideline recommendations are constantly changing, but an algorithm that uses hemodynamic instability and the modified Sgarbossa criteria (MSC) to decide these patients' management could be a high-sensitivity tool and allow physicians to make the best decisions without waiting for laboratory results. MSC, which are more sensitive than the original criteria, continue to be helpful in the diagnosis of AMI. Clinicians should carefully choose the appropriate MSC cut-off (ST/T Ratio -0.20 and -0.25) on a case-by-case basis.

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The diagnostic criteria, treatments at the time of admission, and drugs used in patients with acute coronary syndrome are well defined in countless guidelines. However, there is uncertainty about the measures to recommend during patient discharge planning. This document brings together the most recent evidence and the standardized and optimal treatment for patients at the time of discharge from hospitalization for an acute coronary syndrome, for comprehensive and safe care in the patient's transition between care from the acute event to the outpatient care, with the aim of optimizing the recovery of viable myocardium, guaranteeing the most appropriate secondary prevention, reducing the risk of a new coronary event and mortality, as well as the adequate reintegration of patients into daily life.

Los criterios diagnósticos, los tratamientos en el momento de la admisión y los fármacos utilizados en pacientes con síndrome coronario agudo están bien definidos en innumerables guías. Sin embargo, existe incertidumbre acerca de las medidas para recomendar durante la planificación del egreso de los pacientes. Este documento reúne las evidencias más recientes y el tratamiento estandarizado y óptimo para los pacientes al momento del egreso de una hospitalización por un síndrome coronario agudo, para un cuidado integral y seguro en la transición del paciente entre la atención del evento agudo y el cuidado ambulatorio, con el objetivo de optimizar la recuperación de miocardio viable, garantizar la prevención secundaria más adecuada, reducir el riesgo de un nuevo evento coronario y la mortalidad, así como la adecuada reinserción de los pacientes en la vida cotidiana.

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Introducción: el riesgo de aparición del infarto agudo de miocardio está relacionada con varias comorbilidades, muchas de las cuales son prevenibles y tratables. El infarto agudo de miocardio tiene un impacto relevante en términos de mortalidad y número de hospitalizaciones. Objetivos: determinar las características clínica-epidemiológicas del infarto agudo de miocardio con elevación del segmento ST en pacientes atendidos en el Centro Médico Nacional-Hospital Nacional, durante el periodo 2021-2023. Metodología: el diseño del estudio fue observacional, descriptivo de corte transversal, sobre las características clínica-epidemiológicas del infarto agudo de miocardio con elevación del segmento ST en pacientes mayores de edad atendidos en el Centro Médico Nacional-Hospital Nacional, durante el periodo 2021-2023. Resultados: se analizaron 102 expedientes de pacientes con diagnóstico de infarto agudo de miocardio con elevación del segmento ST con una media de 64 ± 12 años; el 68 % (n = 69) correspondió al sexo masculino, con una edad promedio de 62 años, y en relación a las mujeres el promedio fue de 64 años. El motivo de consulta principal fue el dolor precordial y la cara miocárdica más afectada de acuerdo con el electrocardiograma inicial fue la cara anteroseptal. La mortalidad intrahospitalaria fue del 16 %, el 68 % correspondió a varones. La comorbilidad más frecuente fue la hipertensión arterial. Conclusión: La hipertensión arterial es la patología más prevalente. Asimismo, son habituales la obesidad, el tabaquismo y la diabetes mellitus. Las comorbilidades están en relación directa con la edad y prevalecen en mayores de 60 años. El infarto agudo de miocardio con elevación del segmento ST es más frecuente en el sexo masculino.

Introduction: the risk of acute myocardial infarction is related to several comorbidities, many of which are preventable and treatable. Acute myocardial infarction has a relevant impact in terms of mortality and number of hospitalizations. Objectives: the design of the study was observational, descriptive, cross-sectional, on the clinical characteristics of ST-segment elevation myocardial infarction, in adult patients treated at the Centro Médico Nacional-Hospital Nacional, during the period 2021-2023. Methodology: the design of the study was observational, descriptive, cross-sectional, on the clinical-epidemiological characteristics of acute myocardial infarction with ST segment elevation in adult patients treated at the National Medical Center-National Hospital, during the period 2021-2023. Results: 102 records of patients with a diagnosis of ST-segment elevation myocardial infarction with a mean age of 64 ± 12 years were analyzed; 68 % (n = 69) were male, with an average age of 62 years, and in relation to women the average was 64 years. The main reason for consultation was precordial pain and the most affected myocardial aspect according to the initial electrocardiogram was the anteroseptal aspect. In-hospital mortality was 16 %, 68 % of which were men. The most frequent comorbidity was arterial hypertension. Conclusion: high blood pressure is the most prevalent pathology. Likewise, obesity, smoking and diabetes mellitus are common. Comorbidities are directly related to age and prevail in those over 60 years of age. ST-segment elevation myocardial infarction is more common in males.

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Objetivo: Analisar os fatores preditores para a elevação do custo direto do tratamento hemodinâmico em pacientes com infarto agudo do miocárdio. Métodos: Estudo transversal, com análise documental de 124 prontuários de pacientes com infarto agudo do miocárdio submetidos a procedimentos hemodinâmicos subsidiados pelo SUS, no período de 2016 a 2017. Foram consideradas como variáveis as características sociais e clínicas, a completitude do prontuário e o custo do tratamento. Resultados: O custo médio do tratamento hemodinâmico é de R$ 6.141,94 reais; sendo que a maioria dos pacientes teve custo de tratamento entre R$ 3 a 5 mil reais. Evidenciou-se que os fatores preditores para o custo são: nível de escolaridade; tempo de internação; e completitude do prontuário. O tipo de procedimento e o diagnóstico do paciente são condições clínicas que não interferem no custo do tratamento. Conclusão: O financiamento do sistema público de saúde é deficitário, pois corresponde a metade do menor nível de custo de tratamento hemodinâmico evidenciado. (AU)

Objective: To analyze the predictive factors for the increase in the direct cost of hemodynamic treatment in patients with acute myocardial infarction. Methods: Cross-sectional study, with documental analysis of 124 medical records of patients with acute myocardial infarction undergoing hemodynamic procedures subsidized by the SUS, in the period from 2016 to 2017. Social and clinical characteristics, completeness of the medical record and cost were considered as variables of the treatment. Results: The average cost of hemodynamic treatment is R$ 6,141.94 reais; and most patients had a treatment cost between R$ 3 to 5 thousand reais. It was evident that the predictive factors for the cost are: level of education; length of stay; and completeness of the medical record. The type of procedure and the patient's diagnosis are clinical conditions that do not affect the cost of treatment. Conclusion: The financing of the public health system is deficient, as it corresponds to half of the lowest level of hemodynamic treatment cost evidenced. (AU)

Objetivo: Analizar los factores predictivos del incremento del coste directo del tratamiento hemodinámico en pacientes con infarto agudo de miocardio. Métodos: Estudio transversal, con análisis documental de 124 historias clínicas de pacientes con infarto agudo de miocardio sometidos a procedimientos hemodinámicos subvencionados por el SUS, en el período de 2016 a 2017. Se consideraron características sociales y clínicas, integridad de la historia clínica y costo. como variables del tratamiento. Resultados: El costo promedio del tratamiento hemodinámico es de R$ 6.141,94 reales; y la mayoría de los pacientes tuvo un costo de tratamiento entre R$ 3 a 5 mil reales. Se evidenció que los factores predictivos del costo son: nivel de educación; duración de la estancia; e integridad del expediente médico. El tipo de procedimiento y el diagnóstico del paciente son condiciones clínicas que no afectan el costo del tratamiento. Conclusión: El financiamiento del sistema público de salud es deficiente, ya que corresponde a la mitad del nivel más bajo de costo de tratamiento hemodinámico evidenciado. (AU)

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BACKGROUND: The prognosis of patients with ST-segment elevation myocardial infarction (STEMI) and previous percutaneous coronary intervention (PCI) is uncertain. OBJECTIVE: To evaluate if previous PCI in patients with STEMI increases the risk of major cardiovascular events, and if final epicardial blood flow differs according to the reperfusion strategy. MATERIAL AND METHODS: Observational, longitudinal, comparative sub-study of the PHASE-MX trial that included patients with STEMI and reperfusion within 12 hours of symptom onset, who were classified according to their history of PCI. The occurrence of the composite primary endpoint (cardiovascular death, re-infarction, congestive heart failure and cardiogenic shock) within 30 days was evaluated using Kaplan-Meier estimates, log-rank test and Cox proportional hazards model. Epicardial blood flow was assessed using the TIMI grading system after reperfusion. RESULTS: A total of 935 patients were included; 85.6% were males and 6.9% had a history of PCI; 53% underwent pharmacoinvasive therapy, and 47%, primary PCI. The incidence of the composite primary endpoint at 30 days in patients with a history of PCI was 9.8% vs 13.3% in those with no previous PCI (p = 0.06). Among the patients with previous PCI, 87.1% reached a final TIMI grade 3 flow after primary PCI vs. 75% in the group with pharmacoinvasive strategy (p = 0.235). CONCLUSIONS: A history of PCI does not increase the risk of major cardiovascular events at 30 days; however, it impacted negatively on the final angiographic blood flow of patients that received pharmacoinvasive therapy (compared to primary PCI).

ANTECEDENTES: El pronóstico de los pacientes con infarto agudo de miocardio con elevación del segmento ST (IAMCEST) y antecedente de intervención coronaria percutánea (ICP) es incierto. Objetivos: Evaluar si la ICP previa en pacientes con IAMCEST incrementa el riesgo de eventos cardiovasculares mayores y si el flujo final epicárdico varía según la estrategia de reperfusión. MATERIAL Y MÉTODOS: Subestudio de PHASE-MX, observacional, longitudinal y comparativo, de pacientes con IAMCEST reperfundidos en menos de 12 horas de iniciados los síntomas, divididos conforme el antecedente de ICP. El acaecimiento del criterio de valoración principal (muerte cardiovascular, reinfarto, insuficiencia cardíaca y choque cardiogénico) dentro de los 30 días se comparó con estimaciones de Kaplan-Meier, prueba de rangos logarítmicos y modelo de riesgos proporcionales de Cox. El flujo epicárdico final se evaluó con el sistema de clasificación del flujo TIMI después de la reperfusión. RESULTADOS: Se incluyeron 935 pacientes, 85.6 % del sexo masculino, 6.9 % de los cuales tenía antecedente de ICP; 53 % recibió terapia farmacoinvasiva y 47 %, ICP primaria. La incidencia del criterio de valoración principal en pacientes con ICP previa fue de 9.8 % versus 13.3 % en aquellos sin ese antecedente (p = 0.06); 87.1 % de los pacientes con ICP previa obtuvo flujo final de grado TIMI 3 versus 75 % del grupo con estrategia farmacoinvasiva (p = 0.235). CONCLUSIONES: El antecedente de ICP no incrementa el riesgo de eventos cardiovasculares mayores a los 30 días en pacientes con IAMCEST; sin embargo, impacta negativamente en el flujo sanguíneo angiográfico final de los pacientes que recibieron terapia farmacoinvasiva (en comparación con ICP primaria).

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Resumo Fundamento: O no-reflow (NR) é caracterizado por uma redução aguda no fluxo coronário que não é acompanhada por espasmo coronário, trombose ou dissecção. O índice prognóstico inflamatório (IPI) é um novo marcador que foi relatado como tendo um papel prognóstico em pacientes com câncer e é calculado pela razão neutrófilos/linfócitos (NLR) multiplicada pela razão proteína C reativa/albumina. Objetivo: Nosso objetivo foi investigar a relação entre IPI e NR em pacientes com infarto do miocárdio com supradesnivelamento do segmento ST (IAMCSST) submetidos a intervenção coronária percutânea primária (ICPp). Métodos: Um total de 1.541 pacientes foram incluídos neste estudo (178 com NR e 1.363 com refluxo). A regressão penalizada LASSO (Least Absolute Shrinkage and Select Operator) foi usada para seleção de variáveis. Foi criado um nomograma baseado no IPI para detecção do risco de desenvolvimento de NR. A validação interna com reamostragem Bootstrap foi utilizada para reprodutibilidade do modelo. Um valor de p bilateral <0,05 foi aceito como nível de significância para análises estatísticas. Resultados: O IPI foi maior em pacientes com NR do que em pacientes com refluxo. O IPI esteve associado de forma não linear com a NR. O IPI apresentou maior capacidade discriminativa do que o índice de imunoinflamação sistêmica, NLR e relação PCR/albumina. A adição do IPI ao modelo de regressão logística multivariável de base melhorou a discriminação e o efeito do benefício clínico líquido do modelo para detecção de pacientes com NR, e o IPI foi a variável mais proeminente no modelo completo. Foi criado um nomograma baseado no IPI para prever o risco de NR. A validação interna do nomograma Bootstrap mostrou uma boa capacidade de calibração e discriminação. Conclusão: Este é o primeiro estudo que mostra a associação de IPI com NR em pacientes com IAMCSST submetidos a ICPp.

Abstract Background: No-reflow (NR) is characterized by an acute reduction in coronary flow that is not accompanied by coronary spasm, thrombosis, or dissection. Inflammatory prognostic index (IPI) is a novel marker that was reported to have a prognostic role in cancer patients and is calculated by neutrophil/lymphocyte ratio (NLR) multiplied by C-reactive protein/albumin ratio. Objective: We aimed to investigate the relationship between IPI and NR in ST-segment elevation myocardial infarction (STEMI) patients undergoing primary percutaneous coronary intervention (pPCI). Methods: A total of 1541 patients were enrolled in this study (178 with NR and 1363 with reflow). Lasso panelized shrinkage was used for variable selection. A nomogram was created based on IPI for detecting the risk of NR development. Internal validation with Bootstrap resampling was used for model reproducibility. A two-sided p-value <0.05 was accepted as a significance level for statistical analyses. Results: IPI was higher in patients with NR than in patients with reflow. IPI was non-linearly associated with NR. IPI had a higher discriminative ability than the systemic immune-inflammation index, NLR, and CRP/albumin ratio. Adding IPI to the baseline multivariable logistic regression model improved the discrimination and net-clinical benefit effect of the model for detecting NR patients, and IPI was the most prominent variable in the full model. A nomogram was created based on IPI to predict the risk of NR. Bootstrap internal validation of nomogram showed a good calibration and discrimination ability. Conclusion: This is the first study that shows the association of IPI with NR in STEMI patients who undergo pPCI.

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RESUMEN Objetivo: Identificar factores de riesgo, basados en los parámetros clínicos, ecocardiográficos y terapéuticos, para predecir complicaciones cardiacas en pacientes diabéticos con infarto agudo de miocardio (IAM). Materiales y métodos: Se realizó un estudio observacional, analítico, de casos y controles en el Centro de Cirugía Cardiovascular y Cardiología Santiago de Cuba, adjunto al Hospital Provincial Saturnino Lora, durante el periodo comprendido entre los años 2019 y 2021. La muestra quedó constituida por 266 pacientes, elegidos por muestreo aleatorio simple 1:2. Las variables de estudio se agruparon en demográficas, clínico-ecocardiográficas y terapéuticas. Se realizó el análisis multivariado con todas las variables que constituyeron factores de riesgo; se empleó el análisis de la varianza unidireccional y la regresión logística binaria. Resultados: Las complicaciones más frecuentes fueron la fibrilación auricular y la insuficiencia cardiaca en un 12 %, aproximadamente. Las cifras de control metabólico mostraron alteración al ingreso (OR = 6,92; LI: 2,61; LS: 18,32; p = 0,001). El análisis univariado demostró que diez factores incrementaron el riesgo de presentar complicaciones, entre ellos, el diagnóstico de diabetes mellitus ≥10 años (OR = 2,50; LI: 1,14; LS: 5,45; p = 0,020); además, el análisis multivariado reveló que la edad ≥60 años (OR = 5,624; IC = 1,607-19,686; p = 0,007), el control metabólico al ingreso alterado (OR = 5,245; IC = 1,491-18,447; p = 0,010), la no aplicación de terapia trombolítica (OR = 5,74; IC = 1,46-22,586; p = 0,012), la FEVI ≤ 40 % (OR = 5,245; IC = 1,17-23,433; p = 0,030), la presión de la aurícula izquierda ≥15 mmHg (OR = 12,335; IC = 3,45-44,08; p = 0,001) y la motilidad ≥1,5 puntos (OR = 4,702; IC = 1,258-17,575; p = 0,021) incrementaron el riesgo de forma independiente. Conclusiones: El estudio demostró el valor de seis factores de riesgo de complicaciones cardiacas en el paciente diabético con IAM, donde sobresale el control glucémico al ingreso, la fracción de eyección disminuida del ventrículo izquierdo, la presión de la aurícula izquierda aumentada y la no terapia de reperfusión coronaria.

ABSTRACT Objective: To identify the risk factors based on clinical, echocardiographic and therapeutic parameters which predict the development of cardiac complications among patients with diabetes and acute myocardial infarction (AMI). Materials and methods: An observational, analytical, case-control study was conducted at Centro de Cardiología y Cirugía Cardiovascular de Santiago de Cuba, attached to Hospital Provincial Saturnino Lora, from 2019 to 2021. The sample consisted of 266 patients, chosen by simple random sampling 1:2. The study included demographic, clinical- echocardiographic and therapeutic variables. A multivariate analysis was performed with all the variables considered as risk factors; one-way analysis of variance and binary logistic regression were used. Results: The most frequent cardiac complications were atrial fibrillation and heart failure (approximately 12 %). A metabolic control analysis on admission yielded altered results (OR = 6.92; LI: 2.61; LS: 18.32; p = 0.001). The univariate analysis showed that ten factors increased the risk of complications, including the diagnosis of diabetes mellitus ≥ 10 years (OR = 2.50; LI: 1.14; LS: 5.45; p = 0.020). On the other hand, the multivariate analysis revealed six factors that predict the development of cardiac complications: age ≥ 60 years (OR = 5.624; CI = 1.607-19.686; p = 0.007), altered metabolic control on admission (OR = 5.245; CI = 1.491-18.447; p = 0.010), lack of use of thrombolytic therapy (OR = 5.74; CI = 1.46-22.586; p = 0.012), left ventricular ejection fraction (LVEF) ≤ 40 % (OR = 5.245; CI = 1.17-23.433; p = 0.030), left atrial pressure ≥ 15 mmHg (OR = 12.335; CI = 3.45-44.08; p = 0.001) and motility ≥ 1.5 points (OR = 4.702; CI = 1.258-17.575; p = 0.021). Conclusions: The study demonstrated the value of six risk factors of cardiac complications among patients with diabetes and AMI, where glycemic control on admission, decreased LVEF, increased left atrial pressure and no reperfusion therapy stand out.

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Resumo Neoplasias cardíacas são raras, tendo como principal representante o mixoma atrial (MA), que corresponde a cerca de metade de todos os casos. O MA tem incidência estimada entre 0.001% e 0.3% na população em geral, no entanto apenas aproximadamente 0,06% desses cursam com eventos embólicos coronarianos. Homem de 33 anos, tabagista, admitido com quadro de precordialgia intensa e irradiação para membro superior esquerdo com duração de uma hora. O eletrocardiograma evidenciou elevação de segmento ST nas derivações D2, D3 e aVF troponina sérica elevada, confirmando infarto com supra desnivelamento do segmento ST (IAMCSST). Foi realizada cineangiocoronariografia, a qual revelou oclusão em terço proximal de artéria coronária direita por trombo. Realizada tentativa de aspiração do trombo, sem sucesso, seguido por angioplastia primária com balão sem colocação de stent. Durante a investigação do quadro, paciente realizou ecocardiograma transtorácico o qual demonstrou massa homogênea de superfície regular, de 5.2 cm x 2.3 cm, aderida ao septo interatrial, com lobulações de características emboligênicas prolapsando para valva mitral e ventrículo esquerdo na diástole, compatível com MA. Foi realizada ressecção cirúrgica com paciente evoluindo assintomático, recebendo alta para seguimento ambulatorial. O caso relatado difere em idade e sexo do perfil epidemiológico típico sendo um dos poucos descritos com acometimento da parede inferior apresentando a artéria coronária direita como culpada. Este relato ratifica a importância do diagnóstico diferencial frente às apresentações de IAMCSST em jovens.

Abstract Cardiac tumors are rare entities, among which atrial myxoma (AM) stands as the most frequent, accounting for approximately half of all reported cases. The incidence of AM is estimated to range from 0.001% to 0.3% within the general population, yet only about 0.06% of these cases present with coronary embolic events. We report on a 33-year-old male smoker who experienced acute, severe precordial pain radiating to the left upper limb, lasting for one hour. The electrocardiographic evaluation demonstrated ST-segment elevation in leads D2, D3, and aVF, alongside significantly elevated serum troponin levels, confirming a diagnosis of ST-segment elevation myocardial infarction (STEMI). Subsequent coronary angiography revealed proximal occlusion of the right coronary artery due to thrombus. An initial attempt of thrombus aspiration was unsuccessful, followed by primary angioplasty with balloon inflation without stent placement. Further diagnostic exploration through transthoracic echocardiography identified a homogenous, smooth-surfaced mass measuring 5.2 cm x 2.3 cm attached to the interatrial septum. This mass, characterized by lobulations, prolapsed into the mitral valve and left ventricle during diastole, consistent with AM. Surgical resection of the mass was successfully performed, with the patient being discharged asymptomatic. In the reported case, the patient's profile, notably his age, and gender, diverges from the typical epidemiological characteristics associated with AM. This case adds to the limited number of reports where the inferior wall is affected by the right coronary artery being occluded. This report emphasizes the significance of differential diagnoses in younger patients presenting with STEMI.

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RESUMEN Introducción: La cardiopatía isquémica es la principal causa de muerte en la República Argentina. La forma de presentación que prevalece es el infarto de miocardio (IM), caracterizado por insuficiente perfusión sanguínea, muerte celular y pérdida de masa contráctil. La evolución del remodelado ventricular provoca dilatación ventricular, deterioro hemodinámico, insuficiencia cardíaca y disminución de la sobrevida. Durante este proceso existe un estrés oxidativo miocárdico que podría ser atenuado mediante la administración de N-acetil cisteína (NAC), a través de un aumento de los niveles de glutatión. Objetivos: Evaluar el efecto de la NAC sobre el remodelado post IM. Material y métodos: Se estudiaron durante 28 días conejos neozelandeses en tres grupos experimentales: Control, IM e IM+NAC. Bajo anestesia general se realizó una toracotomía izquierda y, en los grupos con IM, ligadura de una rama de la coronaria izquierda. Al finalizar el período de seguimiento posterior al infarto, se realizaron estudios ecocardiográficos, hemodinámicos y morfológicos del ventrículo izquierdo (VI). Resultados: En los grupos IM e IM+NAC los infartos estaban ubicados en la pared libre del VI y tuvieron tamaños similares. La administración de NAC evitó el adelgazamiento de la zona no infartada y disminuyó la dilatación provocada por el infarto. También pudo observarse que preservó las funciones sistólica y diastólica del VI, con atenuación del deterioro que las mismas sufrieron como consecuencia del infarto. Conclusión: Estos resultados sugieren que la administración de NAC es una terapéutica promisoria para mitigar los efectos desfavorables del remodelado post IM.

ABSTRACT Background: Ischemic heart disease is the main cause of death in Argentina. The prevailing form of presentation is myocardial infarction (MI), characterized by insufficient blood perfusion, cell death and loss of contractile mass. The evolution of ventricular remodeling causes ventricular dilation, hemodynamic impairment, heart failure, and decreased survival. The oxidative stress occurring during this process could be attenuated by the administration of N-acetyl cysteine (NAC) through increased glutathione levels. Objectives: The aim of this study was to evaluate the effect of NAC administration on post-MI remodeling. Methods: New Zealand rabbits were divided into three experimental groups: Control, MI and MI+NAC. A left thoracotomy was performed under general anesthesia, and in the MI groups a branch of the left coronary artery was ligated. Echocardiographic, hemodynamic and morphological studies of the left ventricle were performed at the end of the 28-day post infarction follow-up period. Results: In the MI and MI+NAC groups, the infarcts were located in the left ventricular free wall and had similar sizes. The administration of NAC prevented non-infarcted area thinning and decreased the dilation caused by the infarction. It also preserved left ventricular systolic and diastolic functions, attenuating the impairment that they suffered as a consequence of the infarction. Conclusion: These results suggest that NAC administration is a promising therapy to mitigate the unfavorable effects of post-MI remodeling.

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Fundamento: Pese a la importancia del primer evento de fibrilación auricular como una de las urgencias médicas más tratadas, en Cienfuegos, son insuficientes los estudios en los que se describan las características clínico-epidemiológicas de estos pacientes. Objetivo: Caracterizar clínica y epidemiológicamente los pacientes con primer evento de fibrilación auricular en Cienfuegos entre los años 2020-2022. Método: Se realizó un estudio descriptivo y transversal. El universo estuvo conformado por 54 pacientes con diagnóstico de primer evento de fibrilación auricular ingresados en el Servicio de Cardiología del Hospital General Universitario Dr. Gustavo Aldereguía Lima de Cienfuegos entre los años 2020-2022. Las variables estudiadas fueron: edad, sexo, color de la piel, hábitos tóxicos, antecedentes patológicos personales, manifestaciones clínicas, parámetros ecocardiográficos y tratamiento. Se calcularon la frecuencia absoluta y relativa de las variables. Los resultados se presentaron en tablas. Resultados: Predominó el sexo masculino, el grupo etáreo de 36-55 años, el color de piel blanca, y el tabaquismo. Los antecedentes patológicos personales más frecuentes fueron: la hipertensión arterial (74,1 %), la diabetes mellitus tipo 2 (16,7 %) y las valvulopatías (11,1 %). Las manifestaciones clínicas más frecuentes fueron: las palpitaciones (77,8 %), seguidas de la disnea (12,9 %). Los parámetros ecocardiográficos estuvieron en el rango de la normalidad. El tratamiento farmacológico se aplicó al 68,5 % seguido de cardioversión farmacológica y eléctrica en el 16,7 %. Conclusiones: El mayor número de pacientes con primer evento de fibrilación auricular, tienen un corazón estructuralmente sano, por lo que se considera de vital importancia la prevención de recurrencias, esto evitará la creación de condiciones eléctricas y anatómicas que perpetúen la arritmia.

Foundation: Despite the importance of the first event of atrial fibrillation as one of the most treated medical emergencies, in Cienfuegos, there are insufficient studies describing the clinical-epidemiological characteristics of these patients. Objective: To clinically and epidemiologically characterize patients with the first event of atrial fibrillation in Cienfuegos between the years 2020-2022. Method: A descriptive and cross-sectional study was carried out. The universe was made up of 54 patients diagnosed with a first event of atrial fibrillation admitted to the Cardiology Service of the Dr. Gustavo Aldereguía Lima General University Hospital in Cienfuegos between the years 2020-2022. The variables studied were: age, sex, skin color, toxic habits, personal pathological history, clinical manifestations, echocardiographic parameters and treatment. The absolute and relative frequencies of the variables were calculated. The results were presented in tables. Results: The male sex, the age group of 36-55 years, white skin color, and smoking predominated. The most common personal pathological history was: high blood pressure (74.1%), type 2 diabetes mellitus (16.7%) and valvular heart disease (11.1%). The most frequent clinical manifestations were: palpitations (77.8%), followed by dyspnea (12.9%). Echocardiographic parameters were within the normal range. Pharmacological treatment was applied to 68.5% followed by pharmacological and electrical cardioversion in 16.7%. Conclusions: The largest number of patients with a first event of atrial fibrillation have a structurally healthy heart, so the prevention of recurrences is considered of vital importance, this will avoid the creation of electrical and anatomical conditions that perpetuate the arrhythmia.

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In Brazil and around the world, cardiovascular diseases are responsible for thousands of deaths every year. Among these, those related to ischemic heart disease stand out. From this perspective, to assist in the development of effective and timely health strategies and policies, this study aimed to analyze deaths from Acute Myocardial Infarction (AMI) reported in municipalities belonging to the I Regional Health Management (GERES) of Pernambuco in the years 2018 to 2021. This is a retrospective ecological study, carried out using data from the Mortality Information System. The variables used to describe deaths from AMI were: municipality of coverage, sex, age, color/race, education, marital status and place of death. The results showed a reduction in deaths due to heart attacks in the municipalities and years investigated. The variables studied showed a statistically significant association with the rates of deaths from AMI. The predominant profile of deaths from heart attacks was among residents of the reef, male, mixed race, with one to three years of education, aged 75 and over and married. This study makes important contributions by describing the profile of deaths due to AMI in the I GERES municipalities of Pernambuco and can help guide public health strategies. (AU)

No Brasil e no Mundo, as doenças cardiovasculares são responsáveis por milhares de mortes todos os anos. Entre tais, destacam-se aqueles relacionados à doença isquêmica do coração. Nesta perspectiva, para auxiliar na elaboração de estratégias e políticas de saúde eficazes e oportunas, este estudo teve como objetivo analisar as mortes por Infarto Agudo do Miocárdio notificadas nos municípios pertencentes à I Gerência Regional de Saúde (GERES) de Pernambuco nos anos de 2018 a 2021. Trata-se de um estudo ecológico retrospectivo, realizado através de dados do Sistema de Informação de Mortalidade. A variáveis utilizadas para a descrição das mortes por IAM foram: município de abrangência, sexo, idade, cor/raça, escolaridade, estado civil e local de ocorrência do óbito. Os resultados mostraram redução dos óbitos por Infarto nos municípios e anos investigados. As variáveis estudadas apresentaram associação estatisticamente significativa com as taxas de mortes por IAM. O perfil predominante das mortes por infarto foi entre os residentes do recife, sexo masculino, pardos, escolaridade de um a três anos, com faixa etária de 75 anos e mais e com estado civil casado. Este estudo traz contribuições importantes ao descrever o perfil dos óbitos por IAM nos municípios da I GERES de Pernambuco, podendo auxiliar no direcionamento de estratégias em saúde pública. (AU)

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Resumen Antecedentes: El pronóstico de los pacientes con infarto agudo de miocardio con elevación del segmento ST (IAMCEST) y antecedente de intervención coronaria percutánea (ICP) es incierto. Objetivos: Evaluar si la ICP previa en pacientes con IAMCEST incrementa el riesgo de eventos cardiovasculares mayores y si el flujo final epicárdico varía según la estrategia de reperfusión. Material y métodos: Subestudio de PHASE-MX, observacional, longitudinal y comparativo, de pacientes con IAMCEST reperfundidos en menos de 12 horas de iniciados los síntomas, divididos conforme el antecedente de ICP. El acaecimiento del criterio de valoración principal (muerte cardiovascular, reinfarto, insuficiencia cardíaca y choque cardiogénico) dentro de los 30 días se comparó con estimaciones de Kaplan-Meier, prueba de rangos logarítmicos y modelo de riesgos proporcionales de Cox. El flujo epicárdico final se evaluó con el sistema de clasificación del flujo TIMI después de la reperfusión. Resultados: Se incluyeron 935 pacientes, 85.6 % del sexo masculino, 6.9 % de los cuales tenía antecedente de ICP; 53 % recibió terapia farmacoinvasiva y 47 %, ICP primaria. La incidencia del criterio de valoración principal en pacientes con ICP previa fue de 9.8 % versus 13.3 % en aquellos sin ese antecedente (p = 0.06); 87.1 % de los pacientes con ICP previa obtuvo flujo final de grado TIMI 3 versus 75 % del grupo con estrategia farmacoinvasiva (p = 0.235). Conclusiones: El antecedente de ICP no incrementa el riesgo de eventos cardiovasculares mayores a los 30 días en pacientes con IAMCEST; sin embargo, impacta negativamente en el flujo sanguíneo angiográfico final de los pacientes que recibieron terapia farmacoinvasiva (en comparación con ICP primaria).

Abstract Background: The prognosis of patients with ST-segment elevation myocardial infarction (STEMI) and previous percutaneous coronary intervention (PCI) is uncertain. Objectives: To evaluate if previous PCI in patients with STEMI increases the risk of major cardiovascular events, and if final epicardial blood flow differs according to the reperfusion strategy. Material and methods: Observational, longitudinal, comparative sub-study of the PHASE-MX trial that included patients with STEMI and reperfusion within 12 hours of symptom onset, who were divided according to their history of PCI. The occurrence of the composite primary endpoint (cardiovascular death, re-infarction, congestive heart failure and cardiogenic shock) within 30 days was evaluated using Kaplan-Meier estimates, log-rank test and Cox proportional hazards model. Final epicardial blood flow was assessed using the TIMI grading system after reperfusion. Results: A total of 935 patients were included; 85.6% were males, and 6.9% had a history of PCI; 53% underwent pharmacoinvasive therapy, and 47%, primary PCI. The incidence of the composite primary endpoint at 30 days in patients with a history of PCI was 9.8% vs. 13.3% in those with no previous PCI (p = 0.06). Among the patients with previous PCI, 87.1% reached a final TIMI grade 3 flow after primary PCI vs. 75% in the group with pharmacoinvasive strategy (p = 0.235). Conclusions: A history of PCI does not increase the risk of major cardiovascular events at 30 days; however, it impacted negatively on the final angiographic blood flow of patients that received pharmacoinvasive therapy (compared to primary PCI).