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Resumen Los trabajadores agrícolas se exponen frecuentemente a los pesticidas, los cuales pueden afectar el sistema cardiovascular. El objetivo de la investigación fue revisar la asociación entre la exposición ocupacional a pesticidas, el desarrollo de enfermedades cardiovasculares y los biomarcadores utilizados en la vigilancia de la salud de los trabajadores. Para ello se realizó una revisión no sistemática de la literatura en tres bases de datos: Pubmed, Embase y Scopus, con ecuaciones de búsqueda elaboradas con los términos "agrochemicals", "myocardial infarction", "occupational exposure" y "farmers", y se incluyeron artículos publicados entre 2007 y 2022. Se encontró que los pesticidas causan elevación de las cifras de presión arterial en trabajadores expuestos y en mujeres embarazadas se relaciona con hipertensión gestacional y preeclampsia. Respecto al infarto agudo de miocardio (IAM), el contacto con los pesticidas clorpirifós, coumafós, carbofurano, pendimetalina, trifluralina y acilalanina aumentan el riesgo de IAM en mujeres, y entre los trabajadores masculinos la exposición a dibromuro de etileno, maneb/mancozeb y dimetil-ditiocarbamato de zinc se asoció con mayor mortalidad. La vigilancia epidemiológica se realiza principalmente con la medición de la actividad de la acetilcolinesterasa eritrocitaria (AChE). Se puede concluir que la exposición a pesticidas puede desencadenar enfermedades cardiovasculares agudas y crónicas, como elevación de las cifras de presión arterial, IAM fatal y no fatal. Los pesticidas dimetil ditiocarbamato de zinc, clorpirifós, coumafós, carbofurano, paratión y malatión son las sustancias que tienen mayor relación con el desarrollo de enfermedad cardiovascular.
Abstract Farmworkers are frequently exposed to pesticides, which can affect the cardiovascular system. The objective of the research was to review the association between occupational exposure to pesticides and the development of cardiovascular diseases, and the biomarkers used in monitoring the health of workers. For this, a non-systematic review of the literature was carried out in three databases: Pubmed, Embase and Scopus, with search equations prepared with the terms "agrochemicals", "myocardial infarction", "occupational exposure" and "farmers". Articles published between 2007 and 2022 were included. Pesticides were found to cause elevated blood pressure levels in exposed workers, and in pregnant women it is related to gestational hypertension and preeclampsia. Regarding acute myocardial infarction (AMI), contact the pesticides chlorpyrifos, coumaphos, carbofuran, pendimethalin, trifluralin, and acylalanine increased the risk of AMI in women, and among male workers exposure to ethylene dibromide, maneb/mancozeb, and zinc dimethyldithiocarbamate was associated with increased mortality. Epidemiological surveillance is mainly carried out by measuring erythrocyte acetylcholinesterase (AChE) activity. It can be concluded that exposure to pesticides can trigger acute and chronic cardiovascular diseases, such as elevated blood pressure, fatal and non-fatal AMI. Zinc dimethyl dithiocarbamate, chlorpyrifos, coumafos, carbofuran, parathion and malathion pesticides are the substances most closely related to the development of cardiovascular disease.
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INTRODUCTION: The development of depression after myocardial infarction is associated with a 2- to 2.5-fold increased risk of all-cause mortality, cardiovascular mortality, and cardiovascular events. The objective of this study was to investigate, through a broad search of the literature, whether major depression is associated with worse psychiatric outcomes in middle-aged patients with myocardial ischemia. METHODS: An extensive search for studies on the association between major depression and myocardial ischemia was conducted in the PubMed, Embase, PsycINFO, and Web of Science databases. Randomized clinical trials of middle-aged patients with myocardial ischemia and concomitant depressive symptoms were included. RESULTS: The 14 articles included in this systematic review did not confirm an association between myocardial ischemia and depression with worse psychiatric outcomes in middle-aged patients. However, worse cardiovascular outcomes have been observed in patients with depression after myocardial infarction. CONCLUSIONS: The findings of this study suggest that major depression increases cardiovascular risk in patients after acute myocardial infarction, possibly because of a more pronounced increase in inflammatory markers. REGISTRATION: This systematic review was registered in the International Prospective Registry of Systematic Reviews (PROSPERO) under the number CRD: 511650.
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Trastorno Depresivo Mayor , Infarto del Miocardio , Isquemia Miocárdica , Ensayos Clínicos Controlados Aleatorios como Asunto , Humanos , Infarto del Miocardio/psicología , Infarto del Miocardio/epidemiología , Isquemia Miocárdica/psicología , Isquemia Miocárdica/epidemiología , Persona de Mediana Edad , Enfermedades Cardiovasculares/psicologíaRESUMEN
Lung ultrasound is a tool that is increasingly gaining strength in the initial evaluation of the patient in the emergency department and in critical care areas, making it particularly useful for cardiologists. In patients with ST elevation and acute myocardial infarction it has been observed that 25-45% of patients are wrongly classified as Class I in the Killip and Kimball classification after lung ultrasound (subclinical congestion). The clinical relevance of this finding lies in the fact that the greater the number of B lines, the greater short- and long-term the mortality is. An important advantage is that no prolonged time for learning the technique is required. More studies are needed to evaluate the role and importance of subclinical congestion in patients with acute myocardial infarction. Unfortunately, ultrasound is not widely available in developing countries, so the physical examination will continue to play an important role in the initial evaluation of patients with acute myocardial infraction.
El ultrasonido pulmonar es una herramienta que va cobrando más fuerza en la evaluación inicial del paciente en urgencias y en áreas de cuidados críticos, siendo de especial utilidad para el cardiólogo. Se ha observado que entre el 25 y el 45% de los pacientes con infarto agudo de miocardio con elevación del segmento ST se clasifican erróneamente como Clase 1 en la escala de Killip y Kimball después del ultrasonido pulmonar (congestión subclínica). La relevancia clínica de este hallazgo radica en que cuanto mayor es el número de líneas B, mayor es la mortalidad a corto y largo plazo. Una ventaja importante de esta herramienta es que no se requiere un tiempo prolongado para aprender la técnica. Se necesitan más estudios para evaluar el papel y la importancia de la congestión subclínica en pacientes con infarto agudo de miocardio. Desafortunadamente, el ultrasonido no está ampliamente disponible en los países en desarrollo, por lo que el examen físico seguirá desempeñando un papel importante para la evaluación inicial en pacientes con infarto agudo de miocardio.
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BACKGROUND: Nuts consumption is related to cardioprotective effects on primary cardiovascular prevention, but studies conducted in secondary prevention are small, scarce and controversial. The objective of this trial was to evaluate the effects of a regional and sustainable cardioprotective diet added or not with an affordable mixed nuts on cardiometabolic features in patients with previous myocardial infarction. METHODS: DICA-NUTS study is a national, multi-center, and superiority-parallel randomized clinical trial. Males and females over 40 years old diagnosed with previous myocardial infarction in the last 2 to 6 months were included. Patients were allocated into two groups: the Brazilian Cardioprotective diet (DICA Br) supplemented with 30 g/day of mixed nuts (10 g of peanuts; 10 g of cashew; 10 g of Brazil nuts) (intervention group, n = 193); or only DICA Br prescription (control group, n = 195). The primary outcome was low-density lipoprotein cholesterol means (in mg/dL) after 16 weeks. Secondary outcomes were other lipid biomarkers, glycemic and anthropometric data and diet quality. RESULTS: After adjustment for baseline values, participating study site, time since myocardial infarction and statin treatment regimen (high potency, moderate and low potency/no statins), no significant difference was found between the groups in low-density lipoprotein cholesterol concentrations (intervention-control difference: 3.48 mg/dL [-3.45 to 10.41], P = 0.32). Both groups improved their overall diet quality at the end of the study without differences between them after 16 weeks (intervention-control difference: 1.05 (-0.9 to 2.99); P = 0.29). Other lipids, glycemic profile and anthropometrics were also not different between study groups at the end of the study. CONCLUSION: Adding 30 g/day of mixed nuts to the DICA Br for 16 weeks did not change lipid, glycemic and anthropometric features in the post-myocardial infarction setting. TRIAL REGISTRATION: This study is registered on ClinicalTrials.gov website under number NCT03728127 and its World Health Organization Universal Trial Number (WHO-UTN) is U1111-1259-8105.
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LDL-Colesterol , Infarto del Miocardio , Nueces , Humanos , Masculino , Femenino , LDL-Colesterol/sangre , Persona de Mediana Edad , Brasil , Dieta/métodos , Dieta/estadística & datos numéricos , Adulto , AncianoRESUMEN
This study aimed to validate an inflammation-based risk score in patients with ST-segment elevation myocardial infarction (STEMI) by examining their cytokine profiles. Upon admission, patients were evaluated for systemic inflammation using a risk score that assigned points based on specific biomarkers: 1 point for leukocyte count ≥9.3 × 10³ cells/µL, 2 points for high-sensitivity C-reactive protein (hsCRP) ≥13.0 mg/L, and 3 points for serum albumin ≤3.6 g/dL. Patients were categorized into three groups: no inflammation (0 points, n = 13), mild inflammation (1-2 points, n = 35), and severe inflammation (3-6 points, n = 26). Serum levels of 16 key cytokines were measured. Patients with higher risk scores showed elevated interleukin (IL)-6 levels (19.6 vs. 8.5 vs. 6.8 pg/mL; P = 0.021) and decreased interferon-γ-induced protein-10 (IP-10) levels (73.4 vs. 68.8 vs. 112.2 pg/mL; P = 0.011). IL-6 was positively correlated with hsCRP (ρ 0.307) and negatively correlated with albumin (ρ -0.298), while IP-10 was negatively correlated with leukocyte count (ρ -0.301). No other cytokines showed significant association with the risk score. Higher inflammation scores were also associated with an increased incidence of major adverse cardiovascular events, particularly acute heart failure. This study underscores the association between the inflammation-based risk score and cytokine levels, specifically IL-6 and IP-10, in patients with STEMI.
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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.
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A 42-year-old male with ischemic cardiomyopathy presented with acute bilateral femoral artery embolization. After management with embolectomy and fasciotomy in both femoral arteries, transthoracic echocardiography revealed two pedunculated highly mobile left ventricle (LV) thrombi. Given the procedural risk, anticoagulation therapy was recommended over surgery. However, the bleeding risk impeded the continuation of anticoagulation, which increased the thrombus size. Multiorgan failure and disseminated intravascular coagulopathy followed and the patient died. We also systematically reviewed the PubMed and Scopus databases for pedunculated LV thrombi cases and retrieved 74 and 63 reports respectively. Of these, 37 relevant reports (45 cases) plus 11 reports from the manual search were included for data extraction, a total of 56 cases besides our case. Based on the etiologies and risks, LV thrombi are predictable and preventable, especially after ischemic events. A clear diagnostic algorithm and vigilant follow-up are needed as well as multidisciplinary management once a diagnosis is confirmed.
Relatamos o caso de um homem de 42 anos com cardiomiopatia isquêmica que apresentou embolização aguda bilateral das artérias femorais. Embolectomia das artérias femorais e fasciotomia foram realizadas bilateralmente e, posteriormente, o ecocardiograma transtorácico revelou a presença de dois trombos pedunculados altamente móveis no ventrículo esquerdo (VE). Diante do risco associado à abordagem cirúrgica, recomendou-se terapia anticoagulante. No entanto, o risco de sangramento impediu a continuação da anticoagulação, o que levou ao aumento dos trombos. Posteriormente, o paciente evoluiu com falência de múltiplos órgãos e coagulação intravascular disseminada, vindo a óbito. Além do relato de caso, realizamos buscas sistemáticas nas bases de dados PubMed e Scopus por casos de trombos pedunculados no VE. Foram recuperados 74 e 63 relatos, respectivamente, dos quais 37 relatos relevantes (45 casos) e 11 da busca manual foram selecionados para extração de dados, totalizando 56 casos além do nosso. Com base nas etiologias e nos riscos, os trombos no VE são previsíveis e evitáveis, especialmente após eventos isquêmicos. Isso requer um algoritmo diagnóstico claro e acompanhamento vigilante, bem como manejo multidisciplinar após confirmação do diagnóstico.
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Background: Concerns have been raised about cardiac inflammation in patients with long COVID-19, particularly those with myocardial injury during the acute phase of the disease. This study was conducted to examine myopericardial involvement, detected by cardiac magnetic resonance (CMR) imaging in patients hospitalized for COVID-19. Methods: Adult patients hospitalized with COVID-19 who presented myocardial injury or increased D-dimers were enrolled in this prospective study. All patients were invited to undergo CMR imaging examination after discharge. During follow-up, patients with nonischemic myocardial or pericardial involvement detected on the first CMR imaging examination underwent second examinations. CMR imaging findings were compared with those of a control group of healthy patients with no comorbidity. Results: Of 180 included patients, 53 underwent CMR imaging examination. The mean age was 58.4 ± 18.3 years, and 73.6 % were male. Myocardial and pericardial LGE was reported in 43.4 % and 35.8 % of patients, respectively. Nonischemic myocardial or pericardial involvement was reported in 26 (49.1 %) patients. The prevalence of pericardial LGE was associated inversely with the interval between hospital discharge and CMR. COVID-19 survivors had higher end-systolic volume indices (ESVis) and lower left-ventricular ejection fractions than did healthy controls. Seventeen patients underwent follow-up CMR imaging; the end-diastolic volume index, ESVi, and prevalence of pericardial LGE, but not that of nonischemic LGE, were reduced. Conclusion: Among COVID-19 survivors with myocardial injury during the acute phase of the disease, the incidences of nonischemic myocardial and pericardial LGE and CMR imaging-detected signs of cardiac remodeling, partially reversed during follow-up, were high.
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Cardiovascular diseases remain the leading cause of death in the world, and that is why finding an effective and multi-functional treatment alternative to combat these diseases has become more important. Fibrates and thiazolidinediones, peroxisome proliferator-activated receptors alpha and gamma are the pharmacological therapies used to treat dyslipidemia and type 2 diabetes, respectively. New mechanisms of action of these drugs have been found, demonstrating their pleiotropic effects, which contribute to preserving the heart by reducing or even preventing myocardial damage. Here, we review the mechanisms underlying the cardioprotective effects of PPAR agonists and regulating morphological and physiological heart alterations (metabolic flexibility, mitochondrial damage, apoptosis, structural remodeling, and inflammation). Moreover, clinical evidence regarding the cardioprotective effect of PPAR agonists is also addressed.
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Miocardio , PPAR alfa , PPAR gamma , Humanos , PPAR gamma/agonistas , PPAR gamma/metabolismo , PPAR alfa/agonistas , PPAR alfa/metabolismo , Miocardio/patología , Miocardio/metabolismo , Animales , Cardiotónicos/farmacología , Cardiotónicos/uso terapéuticoRESUMEN
Acute myocardial infarction (AMI) results from vulnerable plaque rupture, causing ischemic cardiomyocyte necrosis and intense inflammation. Paradoxically, this inflammation releases factors that aid heart repair. Recent findings suggest a role for extracellular vesicles (EVs) in intercellular communication during post-AMI cardiac repair. However, EVs' tissue origin and chemokine profile in the blood of patients with AMI remains unclear. This study characterized the tissue origin and chemokine receptor profile of EVs in the coronary and peripheral blood of patients with AMI. The results reveal that vesicles isolated from coronary and peripheral blood plasma are enriched in tetraspanin (CD9) and express CD81+, CD90+, and CD144+. The vesicle size ranged between 145 and 162 nm, with the control group exhibiting smaller vesicles (D10) than the AMI group. Furthermore, all vesicles expressed CCR6 and CXCR3, whereas a small percentage expressed CCR4. In addition, a decrease in CXCR3 and CCR6 expression was observed in coronary and peripheral AMI blood vesicles compared with the control; however, no difference was found between AMI coronary and AMI peripheral blood vesicles. In conclusion, our study demonstrates, for the first time, changes in the number of extracellular vesicles expressing CD144+, CXCR3, and CCR6 in the peripheral circulation of patients with AMI. Extracellular vesicles present in the circulation of patients with AMI hold excellent promise as a potential diagnostic tool.
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Aims: Cardiogenic shock (CS) and cardiac arrest (CA) are serious complications in ST-elevation myocardial infarction (STEMI) patients, with lack of long-term data according to their timing of occurrence. This study sought to determine the incidence and relationship between the timing of occurrence and prognostic impact of CS and CA complicating STEMI in the long-term follow-up. Methods and results: We conducted a retrospective analysis of consecutive STEMI patients treated between 2004 and 2017. Patients were divided into four groups based on the occurrence of neither CA nor CS, CA only, CS only, and both CA and CS (CA-CS-, CA+, CS+, and CA+CS+, respectively). Adjusted Cox regression analysis was used to assess the independent association between the CS and CA categories and mortality. A total of 1603 STEMI patients were followed for a median of 3.6 years. CA and CS occurred in the 12.2% and 15.9% of patients, and both impacted long-term mortality [adjusted hazard ratio (HR) = 2.59, 95% confidence interval (CI): 1.53-4.41, P < 0.001; HR = 3.16, 95% CI: 2.21-4.53, P < 0.001, respectively). CA+CS+ occurred in 7.3%, with the strongest association with higher mortality (adjusted HR = 5.36; 95% CI: 3.80-7.55, P < 0.001). Using flexible parametric models with B-splines, the increased mortality was restricted to the first â¼10 months. In addition, overall mortality rates were higher at all timings (all with P < 0.001), except for CA during initial cardiac catheterization (P < 0.183). Conclusion: CS and CA complicating patients presenting with STEMI were associated with higher long-term mortality rate, especially in the first 10 months. Both CS+ and CA+ at any timeframe impacted outcomes, except for CA+ during the initial cardiac catheterization, although this will have to be confirmed in larger future studies, given the relatively small number of patients.
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Background: Myocardial revascularization surgery (MRV) is a revascularization therapy for coronary artery disease aimed at improving survival conditions. Elderly patients with increased comorbidities undergoing MRV face challenges in preventing postoperative complications, including atrial fibrillation (AF), a common arrhythmia occurring in 40% of cases or even in 80% of cases if the procedure is combined with valve surgery. This study aimed to determine the risk factors associated with the appearance of postoperative AF (POAF) in patients undergoing isolated MRV. Methods: This is an epidemiological, retrospective, and analytical case-control study (90 cases and 360 controls). Results: Mortality within the group of patients who presented with POAF in the study population was 15.5%, and 9.44% in the control group. Logistic regression showed an association of AF with the presurgical variables age >60 years and urgent/emergency surgery and the postsurgical variables cardiogenic shock, blood transfusion, pulmonary edema, pleural effusion, orotracheal reintubation, and mechanical ventilation time. Conclusions: Strategies should be proposed for the timely identification of risk factors and postoperative complications related to AF onset to avoid the increased morbidity and mortality associated with this type of arrhythmia during the postoperative period.
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Background: The impact of COVID-19 goes beyond its acute form and can lead to the persistence of symptoms and the emergence of systemic disorders, defined as long-term COVID. Methods: We performed a cross-sectional study that included patients over 18 years of age who recovered from the severe form of COVID-19 at least 60 days after their discharge. Patients and controls were enrolled to undergo transthoracic echocardiography (TTE) using a more sensitive tool, myocardial work, in combination with cardiopulmonary exercise testing (CPET). Results: A total of 52 patients and 31 controls were enrolled. Significant differences were observed in ejection fraction (LVEF; 62 ± 7 vs. 66 ± 6 %; p = 0.007), global longitudinal strain (LVGLS; -18.7 ± 2.6 vs. -20.4 ± 1.4 %; p = 0.001), myocardial wasted work (GWW; 152 ± 81 vs. 101 ± 54 mmHg; p = 0.003), and myocardial work efficiency (GWE; 93 ± 3 vs. 95 ± 2 %; p = 0.002). We found a significant difference in peak VO2 (24.4 ± 5.4 vs. 33.4 ± 8.8 mL/kg/min; p < 0.001), heart rate (160 ± 14 vs. 176 ± 11 bpm; p < 0.001), ventilation (84.6 ± 22.6 vs. 104.9 ± 27.0 L/min; p < 0.001), OUES% (89 ± 16 vs. 102 ± 22 %; p = 0.002), T ½ (120.3 ± 32 vs. 97.6 ± 27 s; p = 0.002) and HRR at 2 min (-36 ± 11 vs. -43 ± 13 bpm; p = 0.010). Conclusion: Our findings revealed an increased wasted work, with lower myocardial efficiency, significantly reduced aerobic exercise capacity, and abnormal heart rate response during recovery, which may be related to previously described late symptoms. The reduction in functional capacity during physical exercise is partly associated with a decrease in resting myocardial work efficiency. These findings strongly indicate the need to determine whether these manifestations persist in the long term and their impact on cardiovascular health and quality of life in COVID-19 survivors.
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BACKGROUND: Ceramides have recently been identified as novel biomarkers associated with diabetes mellitus (DM) and major adverse cardiac and cerebrovascular events (MACCE). This study aims to explore their utility in diagnosing microvascular disease. METHODS: This study prospectively enrolled 309 patients from 2018 to 2020 into three groups: healthy controls (Group 1, N = 51), DM patients without acute myocardial infarction (AMI) (Group 2, N = 150), and DM patients with AMI (Group 3, N = 108). We assessed outcomes using stress perfusion cardiac magnetic resonance (CMR) imaging for coronary microvascular disease (CMD) (Outcome 1), retinography for retinal microvascular disease (RMD) (Outcome 2), both CMD and RMD (Outcome 3), and absence of microvascular disease (w/o MD) (outcome 4). We evaluated the classification performance of ceramides using receiver operating characteristic (ROC) analysis and multiple logistic regression. 11-ceramide panel previously identified by our research group as related to macrovascular disease were used. RESULTS: Average glycated hemoglobin (HbA1c) values were 5.1% in Group 1, 8.3% in Group 2, and 7.6% in Group 3. Within the cohort, CMD was present in 59.5% of patients, RMD in 25.8%, both CMD and RMD in 18.8%, and w/o MD in 38.5%. The AUC values for the reference ceramide ratios were as follows: CMD at 0.66 (p = 0.012), RMD at 0.61 (p = 0.248), CMD & RMD at 0.64 (p = 0.282), and w/o MD at 0.67 (p = 0.010). In contrast, the AUC values using 11-ceramide panel showed significant improvement in the outcomes prediction: CMD at 0.81 (p = 0.001), RMD at 0.73 (p = 0.010), CMD & RMD at 0.73 (p = 0.04), and w/o MD at 0.83 (p = 0.010). Additionally, the plasma concentration of C14.0 was notably higher in the w/o MD group (p < 0.001). CONCLUSIONS: Plasma ceramides serve as potential predictors for health status and microvascular disease phenotypes in diabetic patients.
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INTRODUCTION: In ST-elevation myocardial infarction (STEMI), inflammation is pivotal, with early senescent CD4+CD28null cells implicated in its pathogenesis. However, the functional phenotype of these cells within the coronary circulation remains unclear. METHODS: We examined CD4+ cell subpopulations in blood samples from the coronary sinus and vena cava of 24 STEMI patients and the cephalic vein of seven healthy controls. RESULTS: Our findings revealed reduced CD4+ cell counts in STEMI patients compared to controls (1,998, 1,275-3,268 vs. 4,278, 3,595-4,449), alongside an increased proportion of CD4+ cells lacking CD28 expression (20.1 vs. 6.1%). These CD4+CD28null cells in STEMI predominantly exhibited a Th1 phenotype (47.8% vs. 6.6%). Intriguingly, no significant differences were detected in CD4+CD28null cells between coronary sinus and vena cava, and cytokine levels in these compartments remained similar. CONCLUSION: CD4+CD28null cells are increased in STEMI, mainly polarized toward a Th1 phenotype, and distributed equally between the different vascular beds.
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Antígenos CD28 , Linfocitos T CD4-Positivos , Circulación Coronaria , Citocinas , Fenotipo , Infarto del Miocardio con Elevación del ST , Células TH1 , Humanos , Infarto del Miocardio con Elevación del ST/sangre , Infarto del Miocardio con Elevación del ST/inmunología , Infarto del Miocardio con Elevación del ST/patología , Masculino , Femenino , Persona de Mediana Edad , Anciano , Estudios de Casos y Controles , Antígenos CD28/metabolismo , Células TH1/inmunología , Citocinas/sangre , Citocinas/metabolismo , Linfocitos T CD4-Positivos/inmunología , Linfocitos T CD4-Positivos/metabolismo , Senescencia Celular , Seno Coronario , Mediadores de Inflamación/sangre , Mediadores de Inflamación/metabolismo , Recuento de Linfocito CD4 , InmunofenotipificaciónRESUMEN
Resumo Fundamento: A Cardiomiopatia Chagásica Crônica (CCC) é causada por um processo inflamatório induzido pelo Trypanosoma cruzi, que leva à miocardite com fibrose reativa e reparativa. A CCC progride com alterações de perfusão miocárdica e eventos histopatológicos que afetam a Aptidão Cardiorrespiratória (ACR). Objetivos: Avaliamos os efeitos do Treinamento Físico Aeróbico (TFA) na perfusão miocárdica e nos comprometimentos morfológicos e funcionais relacionados à inflamação e fibrose em hamsters sírios com CCC. Como objetivo secundário, analisamos as áreas de secção transversa do músculo esquelético. Métodos: Hamsters com CCC e seus respectivos controles foram divididos em quatro grupos: CCC sedentário, CCC-TFA, controle sedentário e controle TFA. Sete meses após a infecção, os animais foram submetidos à ecocardiografia, à cintilografia de perfusão miocárdica e ao teste de esforço cardiopulmonar. TFA de intensidade moderada foi realizado durante cinquenta minutos, cinco vezes por semana, por oito semanas. Posteriormente, os animais foram reavaliados. A análise histopatológica foi realizada após os procedimentos acima mencionados. O nível de significância foi estabelecido em 5% em todas as análises (p<0,05). Resultados: Animais com CCC sedentários apresentaram piores Defeitos de Perfusão Miocárdica (DPM) ao longo do tempo, Fração de Ejeção do Ventrículo Esquerdo (FEVE) reduzida, e apresentaram mais inflamação e fibrose quando comparados aos demais grupos (análise ANOVA mista). Por outro lado, o TFA foi capaz de mitigar a progressão do DPM, atenuar a inflamação e a fibrose e melhorar a eficiência da ACR em animais CCC-TFA. Conclusão: Nosso estudo demonstrou que o TFA melhorou a disfunção cardíaca, DPM e reduziu a inflamação e a fibrose em modelos de hamster com CCC. Além disso, os animais CCC-SED apresentaram atrofia do músculo esquelético, enquanto os animais CCC-TFA apresentaram a AST do músculo esquelético preservada. Compreender os efeitos da TFA nas dimensões fisiopatológicas da CCC é crucial para futuras pesquisas e intervenções terapêuticas.
Abstract Background: Chronic Chagas cardiomyopathy (CCC) is caused by an inflammatory process induced by Trypanosoma cruzi, which leads to myocarditis with reactive and reparative fibrosis. CCC progresses with myocardial perfusion abnormalities and histopathological events that affect cardiorespiratory fitness (CRF). Objectives: We evaluated the effects of aerobic physical training (APT) on myocardial perfusion and on morphological and functional impairments related with inflammation and fibrosis in Syrian hamsters with CCC. As a secondary objective, we analyzed the cross-sectional areas of the skeletal muscle. Methods: Hamsters with CCC and their respective controls were divided into four groups: CCC sedentary, CCC-APT, sedentary control and APT control. Seven months after infection, the animals underwent echocardiography, myocardial perfusion scintigraphy and cardiopulmonary exercise testing. Moderate-intensity APT was performed for fifty minutes, five times a week, for eight weeks. Subsequently, the animals were reassessed. Histopathological analysis was conducted after the above-mentioned procedures. The level of significance was set at 5% in all analyses (p<0.05). Results: CCC sedentary animals presented worse myocardial perfusion defects (MPD) over time, reduced left ventricle ejection fraction (LVEF) and showed more inflammation and fibrosis when compared to other groups (mixed ANOVA analysis). Conversely, APT was able to mitigate the progression of MPD, ameliorate inflammation and fibrosis and improve CRF efficiency in CCC-APT animals. Conclusions: Our study demonstrated that APT ameliorated cardiac dysfunction, MPD, and reduced inflammation and fibrosis in CCC hamster models. Additionally, CCC-SED animals presented skeletal muscle atrophy while CCC-APT animals showed preserved skeletal muscle CSA. Understanding APT's effects on CCC's pathophysiological dimensions is crucial for future research and therapeutic interventions.
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Resumo A doença cardiovascular é a causa predominante de mortalidade em escala global. A pesquisa indica que as mulheres, em comparação aos homens, apresentam maior probabilidade de apresentar doença arterial coronariana (DAC) não obstrutiva quando têm sintomas de isquemia miocárdica. Além disso, as mulheres tendem a apresentar uma maior carga de sintomas em relação aos homens e, apesar da presença de doença cardíaca isquêmica, são frequentemente tranquilizadas erroneamente devido à ausência de DAC obstrutiva. Nos casos de cardiopatia isquêmica acompanhada de sintomas de isquemia miocárdica, mas sem DAC obstrutiva, é imperativo considerar a disfunção microvascular coronariana como uma potencial causa subjacente. A disfunção microvascular coronariana, caracterizada por reserva de fluxo coronariano prejudicada resultante de anormalidades funcionais e/ou estruturais na microcirculação, está associada a desfechos cardiovasculares adversos. Modificações no estilo de vida e o uso de medicamentos antiateroscleróticos e antianginosos podem oferecer benefícios potenciais, embora sejam necessários mais ensaios clínicos para informar estratégias de tratamento. Esta revisão tem como objetivo explorar a prevalência, mecanismos subjacentes, abordagens diagnósticas e intervenções terapêuticas para disfunção microvascular coronariana.
Abstract Cardiovascular disease is the predominant cause of mortality on a global scale. Research indicates that women exhibit a greater likelihood of presenting with non-obstructive coronary artery disease (CAD) when experiencing symptoms of myocardial ischemia in comparison to men. Additionally, women tend to experience a higher burden of symptoms relative to men, and despite the presence of ischemic heart disease, they are frequently reassured erroneously due to the absence of obstructive CAD. In cases of ischemic heart disease accompanied by symptoms of myocardial ischemia but lacking obstructive CAD, it is imperative to consider coronary microvascular dysfunction as a potential underlying cause. Coronary microvascular dysfunction, characterized by impaired coronary flow reserve resulting from functional and/or structural abnormalities in the microcirculation, is linked to adverse cardiovascular outcomes. Lifestyle modifications and the use of anti-atherosclerotic and anti-anginal medications may offer potential benefits, although further clinical trials are necessary to inform treatment strategies. This review aims to explore the prevalence, underlying mechanisms, diagnostic approaches, and therapeutic interventions for coronary microvascular dysfunction.
RESUMEN
Resumen Introducción : Las diferentes modificaciones estructu rales que han sido descritas en el corazón del deportista de alto rendimiento dependen de factores como la edad, el género, el tipo de deporte, la intensidad y el tiempo dedicados al entrenamiento. Objetivos : Evaluación de atletas de élite por medio de la ecocardiografía para la descripción de la estructura y la función cardíacas, y la comparación entre deportistas de resistencia cardiorrespiratoria y el resto de los deportistas. Métodos : Realizamos el examen ecocardiográfico en 224 deportistas de élite, 96 mujeres y 128 varones con edades de 15 a 38 años (21.7±5.3 años) y se dividieron en 2 grupos: "Grupo de Resistencia" (resistencia cardiorres piratoria) y "Grupo de no Resistencia" el cual incluyó al resto de los deportes. Se realizó la comparación univaria da de 14 variables ecocardiográficas entre los dos grupos. Resultados : En los hombres se identificaron valores estadísticamente significativos más altos en el grupo de resistencia para septum interventricular, pared posterior, grosor parietal relativo, índice de masa del ventrículo iz quierdo y aurícula izquierda. En las mujeres, el grupo de resistencia tuvo valores de frecuencia cardíaca más bajos con diámetro diastólico e índice de masa del ventrículo izquierdo, significativamente mayores. Conclusiones : La mayoría de las variables ecocar diográficas mostró valores mayores en los atletas de resistencia. En los hombres del Grupo de Resistencia, predominó la hipertrofia excéntrica con mayor incre mento en el grosor parietal y del diámetro de la aurícula izquierda, mientras que en las mujeres las variables indi caron hipertrofia excéntrica a expensas de un aumento del diámetro del ventrículo izquierdo, sin incremento del grosor parietal.
Abstract Introduction : The different structural modifications that have been described in the heart of the high-per formance athlete depend on factors such as age, gender, type of sport, and the intensity and time dedicated to training. Objectives : Evaluation of elite athletes through echo cardiography for the description of cardiac structure and function, and the comparison between athletes with cardiorespiratory endurance and the rest of the athletes. Methods : We performed the echocardiographic ex amination in 224 elite athletes, 96 women and 128 men aged 15 to 38 years (21.7±5.3 years) and they were di vided into 2 groups: "Endurance Group" (cardiorespira tory endurance) and "Non-Endurance Group" which included the rest of the sports. Univariate comparison between the two groups was performed by measuring 14 echocardiographic variables. Results : In men, statistically significant higher values were identified in the endurance group for interventricu lar septum, left ventricular posterior wall, relative wall thickness (RWT), left ventricular mass index and left atrial dimension. In women, the endurance group had signifi cantly lower heart rate values, and significantly higher left ventricular diastolic dimension with normal RWT. Conclusions : Most of the echocardiographic vari ables showed higher sample means in the endurance athletes. In the subgroup of men from the Endurance Group, eccentric hypertrophy prevailed with a greater increase in wall thickness, as well as in the diameter of the left atrium, while in women the variables indicated eccentric hypertrophy at the expense of an increase in left ventricle diameter, without increased wall thickness.