Related Experiment Video
Updated: Sep 28, 2026

Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology
Published on: September 21, 2018
[Complex of factors affecting heart rate dispersion in survivors of myocardial infarction]
Insights
Heart rate variability reduction after myocardial infarction is associated with patient age, heart remodeling, and heart failure severity. These factors impact cardiac health in post-MI patients.
Area of Science:
- Cardiology
- Clinical Investigation
- Physiology
Context:
- Post-myocardial infarction (MI) patients exhibit altered autonomic function.
- Heart rate variability (HRV) is a key indicator of cardiac autonomic control.
- Understanding factors influencing HRV is crucial for managing post-MI patients.
Purpose:
- To identify independent variables associated with heart rate variability parameters in patients with postinfarction cardiosclerosis.
- To explore the relationship between clinical and instrumental data and HRV in myocardial infarction survivors.
Summary:
- This study investigated 74 patients 6+ months post-MI, analyzing temporal and spectral HRV from ECGs.
- Multiple linear regression identified predictors of HRV, including age, cardiac remodeling, and left ventricular dysfunction.
- Reduced HRV in MI survivors correlates with advanced age, cardiac remodeling, and heart failure severity.
Impact:
- Provides insights into the multifactorial nature of autonomic dysfunction post-MI.
- Highlights the importance of assessing cardiac structure and function for HRV evaluation.
- Informs clinical strategies for risk stratification and management of heart failure in post-MI populations.
Aim:
To establish complex of independent variables related to parameters of heart rate variability in patients with postinfarction cardiosclerosis.
Material:
Seventy four patients (age 49-/+0.8 years) were studied in 6 months or later after myocardial infarction. Temporal and spectral characteristics of heart rate variability from 5 min ECG strips were sequentially included in a multiple linear regression model as dependent variables while data of clinical and instrumental investigation were considered as independent parameters.
Results And Conclusion:
Depression of heart rate variability in survivors of myocardial infarction was linked to age, late postinfarction remodeling of the heart, development of systolic and diastolic left ventricular dysfunction and clinical severity of heart failure.
Related Concept Videos
Factors Influencing Heart Rate
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Pathophysiology of Cardiac Performance
Pathophysiology of Heart Failure
Cardiac Output I:Effect of Heart Rate on Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...
Regulation of Heart Rates
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
Cardiomyopathy III: Hypertrophic Cardiomyopathy
