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Related Concept Videos

Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

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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.
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Pulse rhythm01:30

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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.
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Regulation of Heart Rates01:31

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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).
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Correlation between ECG and Cardiac Cycle01:25

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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...
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

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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...
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Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

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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...
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Updated: May 31, 2025

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
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Examining Insula-Default Mode Network Functional Connectivity and Its Relationship with Heart Rate Variability.

Marlene Nogueira1, Juliana da Silva Magalhães1, Adriana Sampaio1

  • 1Psychological Neuroscience Laboratory, Psychology Research Centre (CIPsi), School of Psychology, University of Minho, 4710-057 Braga, Portugal.

Brain Sciences
|January 24, 2025
PubMed
Summary
This summary is machine-generated.

Brain connectivity between the insula and the Default Mode Network (DMN) is not directly linked to Heart Rate Variability (HRV). However, left insula volume positively correlates with HRV in healthy adults.

Keywords:
default mode networkfunctional connectivityheart rate variabilityinsula

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Area of Science:

  • Neuroscience
  • Psychophysiology
  • Autonomic Function

Background:

  • The Default Mode Network (DMN) is crucial for self-referential and emotional processing.
  • The insula integrates emotional and interoceptive signals, linking bodily states to cognition.
  • Functional connectivity between the insula and DMN may enhance emotional regulation.
  • Heart Rate Variability (HRV) reflects parasympathetic nervous system activity and autonomic arousal regulation.

Purpose of the Study:

  • To investigate the relationship between insula-DMN functional connectivity and HRV.
  • To test if insula volume and activity correlate with HRV.
  • To determine if insula-DMN connectivity is associated with HRV in healthy adults.

Main Methods:

  • Structural and functional MRI scans were performed on 43 healthy adults during resting state.
  • Insula-DMN functional connectivity was assessed using resting-state fMRI.
  • Heart Rate Variability (HRV) was measured using the BIOPAC system at rest.

Main Results:

  • A significant positive correlation was observed between left insula volume and HRV.
  • Functional connectivity between the insula and DMN was found.
  • No significant correlation was identified between insula-DMN connectivity and HRV.

Conclusions:

  • Insula-DMN functional connectivity is present but not directly associated with HRV.
  • Left insula volume is positively related to HRV, suggesting a link between insula structure and autonomic function.
  • The complex relationship between brain connectivity and autonomic regulation indicates that other factors likely influence HRV.