Publications by authors named "Ricardo Stein"

Introduction And Aim: Long COVID, characterized by persistent symptoms after acute infection, poses a major public health challenge. Understanding its long-term effects is crucial, particularly in relation to cardiorespiratory recovery. This study aimed to assess changes in cardiorespiratory fitness (CRF) and pulmonary function (PF) over 12 months following acute COVID-19, addressing a significant gap in current knowledge about the disease's lasting impact.

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Over the past four years, pivotal discoveries have deepened the understanding of the relationship between genetic factors and SARS-CoV-2 infection. Numerous genes associated with severe COVID-19 suggest a potential genetic predisposition, which may help explain why some individuals develop more serious illnesses. Emerging evidence highlights the role of genes involved in pulmonary immunity, such as Forkhead box Protein P4 (FOXP4), whose increased expression in lung tissue has been linked to more severe disease.

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Background: Early repolarisation (ER) is commonly observed during cardiovascular screenings of young athletes and can present with various morphologies. However, its prevalence and clinical significance in male Brazilian soccer players have not been characterised. This study aimed to compare the prevalence of different ER patterns and assess their potential clinical significance in this population.

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While there is ongoing debate about the role of the 12‑lead Electrocardiogram (ECG) in the routine screening of young athletes during pre-participation evaluations, studies continue to support the use of ECG within properly organized settings. This paper aims to offer considerations for enhancing the International ECG recommendations for the interpretation of the ECGs of young athletes through an emphasis on 1) percentile outliers, 2) computerized ECG technology and 3) clarification of terminology. We specifically highlight criteria for early repolarization, left atrial abnormality, right bundle branch block, ST shifts, and high and low voltage QRS.

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Objectives: To compare the prevalence of training-related ECG findings in white, mixed-race, and black male Brazilian soccer players.

Design: Multicenter observational study.

Methods: This study involved athletes aged 15 to 35 years from 82 professional clubs across Brazil's five regions.

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: (I) to verify if there are sex differences in respiratory function, respiratory muscle strength, and effort limitation in individuals recovered from severe acute COVID-19 30 months after the initial infection, and (II) to evaluate the influence of length of stay on cardiorespiratory capacity among men and women. : Cross-sectional observational multicentric study with participants from five Brazilian states (São Paulo, Amazonas, Minas Gerais, Bahia, and Brasília). We assessed lung function and respiratory muscle strength by maximum inspiratory pressure (MIP), maximum expiratory pressure (MEP), and cardiorespiratory fitness by cardiopulmonary exercise test (CPET).

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Despite significant advances in the management of coronary artery disease (CAD) and reductions in annual mortality rates in recent decades, this disease remains the leading cause of death worldwide. Consequently, there is an ongoing need for efforts to address this situation. Current clinical algorithms to identify at-risk patients are particularly inaccurate in moderate-risk individuals.

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Background: Exercise-induced complete atrioventricular block (EIAVB) is a rare cardiac conduction abnormality presenting challenges in diagnosis due to non-specific symptoms such as exertional dyspnoea, dizziness, and syncope.

Case Summary: We present a case of a 76-year-old female with recurrent exercise-associated syncope. Non-invasive exercise testing played a crucial role in diagnosing her condition, revealing EIAVB and underscoring its importance in patients with cardiovascular risk factors.

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Type 2 diabetes (T2D) is a multifaceted and heterogeneous syndrome associated with complications such as hypertension, coronary artery disease, and notably, breast cancer (BC). The connection between T2D and BC is established through processes that involve insulin resistance, inflammation and other factors. Despite this comprehension the specific cellular and molecular mechanisms linking T2D to BC, especially through microRNAs (miRNAs), remain elusive.

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Purpose: The objective of this study was to evaluate the independent and added value of a cardiopulmonary exercise test (CPX) to New York Heart Association (NYHA) functional analysis in patients with heart failure (HF) and ejection fraction (EF) <50%.

Methods: Patients (n = 613) with HF and EF < 50% underwent CPX and were followed for 28 ± 17 mo with respect to primary outcomes (death or heart transplantation).

Results: Mean patient age was 56 ± 12 yr, and 64% were male.

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Objectives: To evaluate the prevalence of abnormal ECG findings and their association with imaging results in male Brazilian football players.

Methods: The 'B-Pro Foot ECG' is a multicentre observational study conducted in 82 Brazilian professional clubs. It analysed 6125 players aged 15-35 years (2496 white, 2004 mixed-race and 1625 black individuals) who underwent cardiovascular screening from 2002 to 2023.

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Background: Physical exercise (PE) may improve plasma concentration of interleukin- 6 (IL-6), tumor necrosis factor-alpha (TNF-alpha), and adiponectin (adpN) in heart transplant (HT) patients. However, no consistent data is available on this population.

Aim: Thus, we aimed to conduct a systematic review and meta-analysis on the effects of PE over these pro- and anti-inflammatory biomarkers in HT patients.

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Background: Central Illustration: Non-Invasive Assessment of Cardiodynamics by Impedance Cardiography during the Six-Minute Walk Test in Patients with Heart Failure. The six-minute walk test (6MWT) is commonly used to evaluate heart failure (HF) patients. However, several clinical factors can influence the distance walked in the test.

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Background: Decreased walking ability in patients with peripheral arterial disease is often a clinical problem and limits the quality of life and daily activities of these subjects. physical exercise is important in this scenario, as it improves both the daily walking distance and the ability to withstand intermittent claudication related to the limitations of the peripheral disease.

Objectives: Our aim was to compare the effects of two types of exercise training (aerobic training and aerobic training combined with resistance exercises) on pain-free walking distance (PFWD) and health-related quality of life (HRQoL) in a sample composed of patients with peripheral artery disease (PAD).

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To determine the effects of intense training on aortic pulse wave variables and hemodynamic parameters at baseline and at recovery from maximal exercise testing (MaxET) in triathletes compared with sedentary individuals. In this prospective and experimental study, 21 triathletes and 21 sedentary individuals were recruited and evaluated prior and two minutes after the MaxET using the Mobil-O-Graph®, which estimates the aortic pulse wave from the brachial artery pressure. The augmentation index (AIx@75) was lower in triathletes after the MaxET compared to control group (16.

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