Related Experiment Video

Updated: Jun 19, 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

Heart rate variability and heart rate recovery in patients with coronary artery ectasia

Yasin Turker1, Mehmet Ozaydin, Habil Yucel

  • 1Gulkent State Hospital, Isparta Turkey.

Coronary Artery Disease
|October 20, 2009
PubMed

Insights

Patients with coronary artery ectasia (CAE) exhibit reduced heart rate variability (HRV) and impaired heart rate recovery (HRR). These findings suggest autonomic dysfunction may play a role in CAE development and progression.

Area of Science:

  • Cardiology
  • Autonomic Nervous System Function
  • Heart Rate Variability Analysis

Background:

  • Coronary artery ectasia (CAE) is a dilatation of coronary arteries, a variant of coronary artery disease (CAD).
  • Autonomic dysfunction, indicated by altered heart rate variability (HRV) and heart rate recovery (HRR), is linked to increased cardiovascular risk.
  • No prior studies have investigated the relationship between HRV, HRR, and CAE.

Purpose of the Study:

  • To investigate heart rate recovery (HRR) and heart rate variability (HRV) in patients with coronary artery ectasia (CAE).

Main Methods:

  • The study included 50 patients with CAE and 35 healthy controls.
  • Evaluated time-domain HRV parameters (e.g., SDNN, RMSSD, pNN50) and HRR during exercise stress tests.
  • Utilized electrocardiography, echocardiography, Holter monitoring, and biochemical tests.

Main Results:

  • Patients with CAE showed significantly lower HRV parameters, including standard deviations of all N-N intervals and averages of N-N intervals.
  • Heart rate recovery (HRR) was significantly reduced in the CAE group compared to controls.
  • The incidence of abnormal HRR was significantly higher in patients with CAE (44%) versus controls (14%).

Conclusions:

  • Time-domain heart rate variability (HRV) parameters are reduced in patients with coronary artery ectasia (CAE).
  • Heart rate recovery (HRR) is impaired in individuals with CAE, suggesting potential autonomic dysfunction.
Abstract

More Related Videos

Evaluation of Coronary Flow Reserve After Myocardial Ischemia Reperfusion in Rats06:32

Evaluation of Coronary Flow Reserve After Myocardial Ischemia Reperfusion in Rats

Published on: June 28, 2019

Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and the T...
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...