Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

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

Cardiac Output I:Effect of Heart Rate on Cardiac Output

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 rate...
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

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...
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Electroenzymatic CO<sub>2</sub> Fixation.

Angewandte Chemie (International ed. in English)·2026
Same author

A well-powered test of task difficulty effects on cardiovascular indicators of mental effort.

International journal of psychophysiology : official journal of the International Organization of Psychophysiology·2026
Same author

Approach Motivation and Reward Sensitivity: Effects of High-Definition Transcranial Direct Current Stimulation (HD-tDCS) to Brain Hemispheres on Effort-Related Cardiovascular Response.

The European journal of neuroscience·2026
Same author

Do people really avoid effort? A cost - benefit perspective on the principle of least effort.

Neuroscience and biobehavioral reviews·2026
Same author

siRNA Features-Automated Machine Learning of 3D Molecular Fingerprints and Structures for Therapeutic Off-Target Data.

International journal of molecular sciences·2025
Same author

Lipid-lowering therapy (LLT) in 1,100 cardiac rehabilitation patients with coronary heart disease: the LLT-R(ehabilitation) registry.

Frontiers in cardiovascular medicine·2025

Related Experiment Video

Updated: Jul 3, 2026

Estimate the Cognitive Load Using Electrocardiographic Measure: A Human-AI Collaborative Task
07:08

Estimate the Cognitive Load Using Electrocardiographic Measure: A Human-AI Collaborative Task

Published on: December 5, 2025

Task difficulty effects on cardiac activity.

Michael Richter1, Antonia Friedrich, Guido H E Gendolla

  • 1Department of Psychology, University of Geneva, Geneva, Switzerland. Michael.Richter@pse.unige.ch

Psychophysiology
|July 31, 2008
PubMed
Summary
This summary is machine-generated.

Cardiac reactivity during active coping increases with task difficulty, but only when success is possible. This study supports Wright's model of energy mobilization mediated by beta-adrenergic heart activity.

More Related Videos

Cardiac Catheterization in Mice to Measure the Pressure Volume Relationship: Investigating the Bowditch Effect
07:38

Cardiac Catheterization in Mice to Measure the Pressure Volume Relationship: Investigating the Bowditch Effect

Published on: June 14, 2015

Cardiac Stress Test Induced by Dobutamine and Monitored by Cardiac Catheterization in Mice
15:45

Cardiac Stress Test Induced by Dobutamine and Monitored by Cardiac Catheterization in Mice

Published on: February 10, 2013

Related Experiment Videos

Last Updated: Jul 3, 2026

Estimate the Cognitive Load Using Electrocardiographic Measure: A Human-AI Collaborative Task
07:08

Estimate the Cognitive Load Using Electrocardiographic Measure: A Human-AI Collaborative Task

Published on: December 5, 2025

Cardiac Catheterization in Mice to Measure the Pressure Volume Relationship: Investigating the Bowditch Effect
07:38

Cardiac Catheterization in Mice to Measure the Pressure Volume Relationship: Investigating the Bowditch Effect

Published on: June 14, 2015

Cardiac Stress Test Induced by Dobutamine and Monitored by Cardiac Catheterization in Mice
15:45

Cardiac Stress Test Induced by Dobutamine and Monitored by Cardiac Catheterization in Mice

Published on: February 10, 2013

Area of Science:

  • Psychophysiology
  • Cardiovascular Research
  • Motivational Psychology

Background:

  • Motivational Intensity Theory (MIT) and Obrist's active coping model explain how individuals mobilize energy.
  • Wright's integrative model proposes that beta-adrenergic activity mediates energy mobilization in active coping.

Purpose of the Study:

  • To test Wright's integrative model by examining cardiac reactivity under varying task difficulty.
  • To investigate the relationship between task difficulty, active coping, and cardiovascular responses.

Main Methods:

  • 64 participants performed a memory task across four difficulty levels.
  • Cardiac reactivity was assessed using preejection period (PEP), heart rate (HR), and blood pressure (BP).

Main Results:

  • PEP and systolic BP reactivity increased with task difficulty at levels 1-3.
  • At difficulty level 4 (impossible success), PEP and systolic BP reactivity decreased.
  • Findings support the hypothesis that energy mobilization is linked to perceived possibility of success.

Conclusions:

  • The study provides evidence for Wright's integrative model, demonstrating beta-adrenergic mediation of energy mobilization in active coping.
  • Cardiac reactivity patterns indicate a shift in physiological response when tasks become insurmountable.