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Related Concept Videos

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,...
Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
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 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.
Regulation of Heart Rates01:31

Regulation of Heart Rates

The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
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...
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...

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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

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[Heart rate variability. Applications in psychiatry].

D Servant1, R Logier, Y Mouster

  • 1Service de Psychiatrie Générale, Hôpital Fontan, CHRU de Lille, rue Verhaeghe, 59037 Lille Cedex, France. d-servant@chru-lille.fr

L'Encephale
|October 27, 2009
PubMed
Summary
This summary is machine-generated.

Heart rate variability (HRV) reflects autonomic nervous system balance. Low HRV is linked to cardiovascular issues and mental health disorders, but biofeedback may improve it.

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Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology
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Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology

Published on: September 21, 2018

Area of Science:

  • Physiology
  • Neuroscience
  • Cardiology

Context:

  • The autonomic nervous system (ANS), comprising sympathetic and parasympathetic branches, regulates vital functions antagonistically.
  • Heart rate variability (HRV) measures the interplay between these ANS branches, reflecting the heart's adaptability to stress.
  • HRV analysis, often using electrocardiography (ECG), assesses interbeat interval variations to gauge ANS regulation.

Purpose:

  • To review the role of HRV as an indicator of autonomic nervous system function and its clinical implications.
  • To explore the association between reduced HRV and adverse cardiovascular events and psychological disorders.
  • To examine the potential of biofeedback techniques in modulating HRV.

Summary:

  • Reduced HRV is associated with increased cardiovascular risk post-myocardial infarction and is observed in patients with depression and anxiety disorders.
  • This reduction suggests decreased vagal tone and heightened sympathetic activity, indicating impaired emotional-physiological flexibility.
  • Biofeedback interventions, incorporating respiratory control, relaxation, and meditation, show promise in increasing HRV and parasympathetic activity.

Impact:

  • Understanding HRV's link to health outcomes can inform risk stratification and personalized treatment strategies.
  • Biofeedback interventions may offer a non-invasive approach to enhance autonomic regulation and improve patient prognosis.
  • Further research is needed to establish optimal biofeedback protocols for maximizing HRV enhancement.