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Related Concept Videos

Regulation of Stroke Volume01:27

Regulation of Stroke Volume

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The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
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Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

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Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
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Cardiac Output and Stroke Volume01:11

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Cardiac output (CO) is an integral aspect of human physiology, reflecting the heart's efficiency and responsiveness to the body's needs. It represents the volume of blood that the left or right ventricle ejects into the aorta or pulmonary trunk each minute. The CO is calculated by multiplying the heart rate (HR)—the number of heartbeats per minute—by the stroke volume (SV)—the amount of blood pumped out with each heartbeat.
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

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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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Pulse01:05

Pulse

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The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
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Pathophysiology of Cardiac Performance01:29

Pathophysiology of Cardiac Performance

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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...
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Related Experiment Video

Updated: Oct 23, 2025

Rodent Working Heart Model for the Study of Myocardial Performance and Oxygen Consumption
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Does stroke volume influence heartbeat evoked responses?

Anne Buot1, Damiano Azzalini1, Maximilien Chaumon2

  • 1Laboratoire de Neurosciences Cognitives, Département d'études Cognitives, École normale supérieure, INSERM, PSL Research University, 75005 Paris, France.

Biological Psychology
|August 20, 2021
PubMed
Summary
This summary is machine-generated.

Heartbeat-evoked responses (HERs) fluctuate with stroke volume, but only without cardiac artifact correction. Simple cardiac measures can serve as proxies for stroke volume in magnetoencephalography studies.

Keywords:
BaroreceptorsHeartbeat-evoked responseInteroceptionStroke volume

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Area of Science:

  • Neuroscience
  • Cardiology
  • Biomedical Engineering

Background:

  • Heartbeat-evoked responses (HERs) are neural signals influenced by cardiac activity.
  • Understanding the relationship between cardiac parameters and HERs is crucial for accurate neuroimaging analysis.
  • Current knowledge on how stroke volume affects HERs is limited.

Purpose of the Study:

  • To investigate the relationship between stroke volume and HER amplitude.
  • To assess the impact of cardiac artifact correction on HERs.
  • To identify reliable proxies for stroke volume in magnetoencephalography (MEG) studies.

Main Methods:

  • Simultaneous measurement of stroke volume using impedance cardiography and HER amplitude using magnetoencephalography (MEG) in 21 participants.
  • Analysis of beat-to-beat fluctuations in HER amplitude in relation to stroke volume.
  • Evaluation of the necessity and effectiveness of Independent Component Analysis (ICA) for cardiac artifact correction.
  • Assessment of interbeat intervals and ECG amplitude as potential stroke volume proxies.

Main Results:

  • HER amplitude co-fluctuated with stroke volume on a beat-to-beat basis when cardiac artifacts were not corrected.
  • ICA correction tailored to cardiac artifacts is essential for accurate HER analysis.
  • Interbeat intervals and ECG amplitude were found to be sensitive to stroke volume fluctuations, serving as potential proxies.
  • Interindividual differences in stroke volume were detectable in MEG data, though their heartbeat-locked nature remains uncertain.

Conclusions:

  • The study demonstrates a beat-to-beat link between stroke volume and HERs, contingent on proper artifact correction.
  • Simple cardiac parameters can be utilized as effective proxies for stroke volume in MEG.
  • The findings challenge existing assumptions regarding the direct relationship between stroke volume and HERs, emphasizing the need for artifact-aware analysis.