Right Ventricular Function and Exercise Tolerance in Patients with ST-Elevation Myocardial Infarction
Denisse Guzman-Ramirez1, Anival Trujillo-Garcia1, Meredith Lopez-Rincon1
1Instituto Mexicano del Seguro Social Delegacion Nuevo Leon - Hospital de Cardiologia UMAE - Departamento de Ecocardiografía, Monterrey, Nuevo Leon - México.
Arquivos Brasileiros De Cardiologia
|September 13, 2023
Summary
Right ventricular dysfunction in ST-segment elevation myocardial infarction patients limits exercise capacity. Cardiac rehabilitation programs may need adjustments for these individuals to improve functional outcomes.
Area of Science:
- Cardiology
- Exercise Physiology
- Rehabilitation Medicine
Background:
- ST-segment elevation myocardial infarction (STEMI) survivors with cardiac dysfunction experience physical activity limitations.
- Right ventricular (RV) function is crucial for enhancing functional capacity post-STEMI.
- Cardiac rehabilitation (CR) is a vital component of recovery for these patients.
Purpose of the Study:
- To investigate the relationship between RV function and exercise tolerance in STEMI patients undergoing CR.
- To determine if pre-CR RV function predicts exercise capacity improvements after CR.
Main Methods:
- Retrospective cohort study of 109 STEMI patients (2019).
- Echocardiographic assessment of RV function prior to a 16-session CR program.
- Cardiopulmonary exercise (CPX) testing performed pre- and post-CR to measure exercise tolerance (peak VO2equivalents).
Main Results:
- 3.7% global, 10.1% radial, and 11% longitudinal RV dysfunction identified.
- Radial and longitudinal RV dysfunction correlated with a lack of cardiorespiratory fitness improvement (p=0.028, p=0.008).
- RV dysfunction (global, longitudinal) was significantly associated with lower initial, final, and improved peak VO2equivalents (p<0.05).
Conclusions:
- Right ventricular dysfunction is linked to reduced exercise capacity in STEMI patients.
- Tailoring or extending CR programs may be beneficial for patients with RV dysfunction.
Related Concept Videos
01:26Exercise Stress Test
271
Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
271
01:22Mitral Stenosis I: Introduction
15
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
15
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
16
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
16
01:23Mitral Stenosis II: Clinical features and Diagnostic Tests
22
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
22
01:26Imbalances in Cardiac Output
1.4K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
1.4K
01:20Exercise and Cardiovascular Response
856
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
856