RESUMEN
RESUMEN El shock cardiogénico puede complicar la evolución del infarto agudo de miocardio con elevación del segmento ST en aproximadamente el 10 % de los casos, y se asocia a elevada mortalidad. Las guías de práctica recomiendan en este contexto el empleo de dispositivos de soporte circulatorio mecánico con base en opinión de expertos o estudios no aleatorizados. Entre 2023 y 2024 se han publicado 3 ensayos clínicos aleatorizados con el empleo de ECMO o Impella, cuyos resultados y posible influencia en las guías de práctica se discuten en la presente revisión.
ABSTRACT Cardiogenic shock can complicate the course of ST-segment elevation myocardial infarction in approximately 10% of cases and is associated with high mortality. In this context, practice guidelines recommend the use of mechanical circulatory support devices based on expert opinion or non-randomized studies. Between 2023 and 2024, three randomized clinical trials using ECMO or Impella have been published. The results of these trials and their potential impact on practice guidelines are discussed in the present review.
RESUMEN
RESUMEN Introducción: La enfermedad de Chagas afecta aproximadamente a 6 millones de personas en América Latina. El 25 a 35% evoluciona hacia la Miocardiopatía Chagásica (MCh). Una opción terapéutica en sus estadios avanzados es el trasplante cardíaco (TxC). Objetivos: Comparar la supervivencia de pacientes con TxC por MCh frente a otras etiologías. Analizar la incidencia de la reactivación (Ra) de enfermedad de Chagas y su impacto en la supervivencia en este subgrupo de pacientes. Material y métodos: Se evaluaron retrospectivamente pacientes con TxC entre agosto 1998 y marzo 2021. Se analizó la supervivencia mediante curvas de Kaplan-Meier y log rank test. El diagnóstico de Ra se realizó mediante métodos moleculares, prueba de Strout en sangre periférica, tejido miocárdico y/o cutáneo. Resultados: De 606 pacientes con TxC, 39 (6,4%) presentaban MCh. Seguimiento medio 4,4 años (Rango Intercuartilo 1,2-8,6). Edad subgrupo MCh 51 años (RIC 45-60). Hombres 28 (72%). Se documentó Ra en el 38,5% de los pacientes. Supervivencia a 1, 5 y 10 años en TxC por MCh con Ra versus no Ra: 85%, 76% y 61% versus 72%, 55% y 44% (p = 0,3). Supervivencia a 1, 5 y 10 años en TxC por MCh versus TxC por otras causas: 79%, 65% y 50% versus 79%, 62% y 47% (p = 0,5). Conclusión: En nuestra serie no se encontró diferencia estadísticamente significativa en la supervivencia de los pacientes trasplantados cardíacos por MCh en comparación con aquellos trasplantados por otras causas; así como tampoco entre los pacientes que reactivaron la enfermedad de Chagas y los que no lo hicieron.
ABSTRACT Background: Chagas disease affects about 6 million people in Latin America, and 25 to 35% progress to Chagas cardiomyopathy (ChCM). Heart transplantation (HTx) is a therapeutic option in advanced stages. Objectives: The aim of this study is to compare survival of patients with HTx due to ChCM versus those transplanted for other etiologies and to analyze the incidence of Chagas disease reactivation (Ra) and its impact on survival in this group of patients. Methods: Patients undergoing HTx between August 1998 and March 2021 were retrospectively evaluated. Survival was analyzed using Kaplan-Meier curves and the log-rank test. The diagnosis of Ra was performed by molecular methods, Strout's test in peripheral blood, myocardial tissue or skin tissue. Results: Of 606 patients with Htx, 39(6,4%) presented ChCM. Median follow up was 4.4 years (interquartile range 1.2-8.6). Median age of the subgroup with ChCM was 51 years (IQR 45-60) and 28 were men (72%). Reactivation was documented in 38.5% of the patients. Survival at 1, 5 and 10 years in HTx recipients due to ChCM and Ra versus no Ra was 85%, 76% and 61% versus 72%, 55% and 44%, respectively (p = 0.3). Survival at 1, 5 and 10 years in HTx recipients due to ChCM versus HTx for other causes was 79%, 65% and 50% versus 79%, 62% and 47%, respectively (p = 0.5). Conclusion: In our series we did not find statistically significant differences in survival of heart transplant recipients due to ChCM versus those transplanted due to other reasons. Survival in patients with Chagas disease reactivation and those without reactivation was also similar.
RESUMEN
RESUMEN Se presenta el primer implante exitoso de asistencia ventricular izquierda como terapia de destino mediante el dispositivo de flujo continuo centrífugo con levitación magnética intracorpóreo HeartMate 3TM (Abbott) en la Argentina. El dispositivo se implantó en una paciente de 52 años portadora de miocardio no compacto con disfunción ventricular izquierda grave, hipertensión pulmonar, insuficiencia cardíaca avanzada en estadio INTERMACS 3 y contraindicación para trasplante cardíaco debido a títulos elevados de anticuerpos preformados contra el sistema HLA en crossmatch contra panel.
ABSTRACT First case of successful implantation of intracorporeal full magnetically levitated continuous centrifugal flow left ventricular assist device HeartMate 3 Abbott® as destination therapy in Argentina in a female patient, 52-years-old with non compaction cardiomyopathy, severe left ventricular dysfunction, pulmonary hypertension, end-stage heart failure INTERMACS 3 and contraindication for heart transplantation due to high titers of preformed antibodies against the HLA system in panel reactive antibody assay.
RESUMEN
BACKGROUND: Supraventricular arrhythmias (SVAs), commonly managed with radiofrequency ablation (RFA), may occur after orthotopic heart transplantation (OHT). METHODS: We retrospectively assessed 514 consecutive patients (pts.) undergoing OHT between January 1990 and July 2016 in a single-center. Patients with SVAs managed with RFA were included. Mechanisms of genesis of SVAs, association with surgical techniques and outcomes, were analyzed. RESULTS: Of 514 pts undergoing OHT, 53% (272 pts.) were managed with bicaval (BC) technique and 47% (242 pts.) with biatrial (BA) technique. Mean follow-up 10 ± 8.4 years. Nine pts. (1.7%) developed SVA requiring RFA. The BC technique was performed in 4 pts., 3 pts. presented cavotricuspid isthmus-dependent atrial flutter (CTI AFL), and 1 pt. double loop AFL. Five pts. were managed with BA technique, 4 pts. presented CTI AFL, and 1 pt. atrial tachycardia (AT). Mean time between OHT and SVA occurrence was 6.6 ± 5.5 years. The procedure was successful in 89% (8 pts.). Arrhythmia recurrence was seen in 3 pts (37%), all with BA technique. CONCLUSION: Supraventricular arrhythmias in heart transplantation may be associated with the surgical scar. Identifying the mechanism is vital to choose the appropriate treatment with radiofrequency ablation.
Asunto(s)
Ablación por Catéter , Trasplante de Corazón , Ablación por Radiofrecuencia , Arritmias Cardíacas/etiología , Arritmias Cardíacas/cirugía , Estudios de Seguimiento , Trasplante de Corazón/efectos adversos , Humanos , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
BACKGROUND: Patients with cardiogenic shock may require hemodynamic stabilization with short-term mechanical circulatory support devices (ST-MCS) such as extracorporeal membrane oxygenation (ECMO) and centrifugal pump (CP) as bridge to transplantion (BTT). This study aimed to describe ECMO and CP during BTT and after heart transplant. METHODS: A cohort of patients on ECMO or CP as BTT between April 2006 and April 2018 in a single hospital. RESULTS: Thirty-seven consecutive patients with ECMO (n = 14) or CP (n = 23) were included. Acute kidney injury was more prevalent during CP (28.6% vs 69.6%, P = .02). There were no differences in stroke, thrombosis, sepsis, or vasoplegia. Bleeding (0% vs 56.5%, P = .0003) and reoperation (0% vs 47.8%, P = .002) were more frequent in CP group as well as mortality (0 vs 7 [30.4%], P = .03). The remaining 30 patients (81.1%) underwent heart transplantation, without differences in primary graft dysfunction, vasoplegia, reoperation for bleeding, or hospital stay. Mortality was 23.3% at 30 days, similar in both groups, with no further deaths at median follow-up of 44.2 months. CONCLUSIONS: In patients with cardiogenic shock, ST-MCS with ECMO or CP as BTT are a lifesaving approach allowing successful transplantation in the majority of cases, with good short- and long-term survival.
Asunto(s)
Trasplante de Corazón , Corazón Auxiliar , Choque Cardiogénico , Argentina/epidemiología , Humanos , Estudios Prospectivos , Estudios Retrospectivos , Choque Cardiogénico/terapia , Resultado del TratamientoRESUMEN
RESUMEN Introducción: Los scores de riesgo se encuentran recomendados para estratificar y predecir mortalidad en el infarto agudo de miocardio con elevación del segmento ST (IAMCEST). Los modelos ProACS y Simple Risk Index (SRI) son scores simples que demostraron una buena capacidad predictiva de mortalidad intrahospitalaria en otros países. Objetivo: Validar y comparar los scores ProACS y SRI como predictores de mortalidad intrahospitalaria en pacientes con IAMCEST. Material y métodos: Análisis retrospectivo de una cohorte compuesta por pacientes ingresados de forma consecutiva con diagnóstico de IAMCEST, en el que se utilizaron datos del registro CONAREC XVII. Se estimó el valor predictivo para muerte intrahospitalaria y se evaluó la validez mediante la discriminación y la calibración. Resultados: Se analizaron 694 pacientes. La mortalidad intrahospitalaria fue del 8,78%. En aquellos que presentaron el evento, la mediana del score ProACS fue de 4 (Pc 25-75, 2,5-5); y una mediana de 2 (Pc 25-75 1-3) en aquellos que no presentaron (p < 0,001). La mediana del score SRI fue de 41,3 (Pc 25-75, 29,8-62,5) y de 20,8 (Pc 25-75 15,4-30) en aquellos que fallecieron y los que no, respectivamente (p < 0,001), y demostró una excelente discriminación (AUC 0,83, IC95% 0,78-0,88, p = 0,001) y el score ProACS presentó una buena discriminación del desenlace (AUC 0,78, IC95% 0,71-0,86, p = 0.001). La prueba de HL aplicada al score Proacs presentó χ2 = 8,6 (p = 0,3), y el score SRi χ2 = 5,4 (p = 0,7). Conclusiones: Los puntajes de riesgo de ProACS y SRI para la predicción de mortalidad intrahospitalaria fueron validados adecuadamente en pacientes con IAMCEST en Argentina. Esto sugiere su idoneidad para el uso clínico en esta población.
ABSTRACT Background: Risk scores are recommended to stratify and predict mortality in ST-segment elevation acute myocardial infarction (STEMI). The ProACS and Simple Risk Index (SRI) models are simple scores that have demonstrated adequate predictive capacity of in-hospital mortality in other countries. Objective: The aim of this study was to validate and compare the ProACS and SRI scores as predictors of in-hospital mortality in patients with STEMI. Methods: This was a retrospective analysis of a cohort composed of consecutive patients from the CONAREC XVII registry hospitalized with STEMI diagnosis. The predictive value for in-hospital mortality was estimated and validity was assessed by discrimination and calibration. Results: The study analyzed 694 patients. In-hospital mortality was 8.78%. The median ProACS score was 4 (IQR 25-75, 2.5-5) in patients who presented the event, and 2 (IQR 25-75 1-3) in those without the event (p<0.001) and the median SRI score was 41.3 (IQR 25-75, 29.8-62.5) and 20.8 (IQR 25-75 15.4-30) in those who died and those who did not, respectively (p<0.001). The SRI score showed excellent discrimination (AUC 0.83, 95% CI 0.78-0.88, p=0.001) and the ProACS score evidenced good discrimination (AUC 0.78, 95% CI 0.71-0.86, p= 0.001) for the outcome. The HL test applied to the ProACS score presented χ2=8.6 (p=0.3), and the SRI score χ2=5.4 (p=0.7). Conclusions: The ProACS and SRI risk scores for the prediction of in-hospital mortality were adequately validated in patients with STEMI in Argentina. This suggests their suitability for clinical use in this population.