Related Experiment Video

Updated: Jul 24, 2026

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
08:12

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions

Published on: June 5, 2019

[Autonomic function and severity of hypertrophic cardiomyopathy by power spectrum analysis on heart rate variability]

S Inoue1, S Nezuo, T Sawayama

  • 1Department of Medicine, Kawasaki Medical School.

Kokyu to Junkan. Respiration & Circulation
|December 1, 1992
PubMed

Insights

Autonomic function, assessed by heart rate variability (HRV), is altered in hypertrophic cardiomyopathy (HCM). HRV analysis can help assess HCM severity, particularly in patients with ventricular tachycardia (VT) or poor exercise blood pressure response.

Area of Science:

  • Cardiology
  • Autonomic Neuroscience
  • Biomedical Engineering

Context:

  • Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
  • Autonomic dysfunction is increasingly recognized in HCM.
  • Assessing autonomic function aids in understanding disease severity and prognosis.

Purpose:

  • To investigate the relationship between autonomic function and the severity of hypertrophic cardiomyopathy (HCM).
  • To determine if heart rate variability (HRV) parameters can differentiate HCM severity, including presence of ventricular tachycardia (VT) and poor exercise blood pressure response.

Summary:

  • Autonomic function was assessed using 24-hour Holter monitoring and power spectrum analysis of HRV in 30 HCM patients and 10 controls.
  • HCM patients exhibited decreased nighttime high-frequency (HF) and low-frequency (LF) components and an increased LF/HF ratio compared to controls.
  • Further reductions in HF were observed in HCM with VT, and decreased LF/HF ratio in those with poor exercise blood pressure response.

Impact:

  • Findings suggest HRV power spectrum analysis is a viable tool for assessing autonomic dysfunction and disease severity in HCM.
  • This approach may improve risk stratification and management strategies for HCM patients.
  • Highlights the role of autonomic alterations in HCM pathophysiology.

More Related Videos

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation08:10

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

Published on: July 20, 2022

A Pacing-Controlled Procedure for the Assessment of Heart Rate-Dependent Diastolic Functions in Murine Heart Failure Models07:49

A Pacing-Controlled Procedure for the Assessment of Heart Rate-Dependent Diastolic Functions in Murine Heart Failure Models

Published on: July 21, 2023

Related Concept Videos

Pathophysiology of Cardiac Performance01:29

Pathophysiology of Cardiac Performance

Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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...
Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...