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Related Concept Videos

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...
Exercise and Muscle Performance01:27

Exercise and Muscle Performance

Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
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...
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...

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Related Experiment Video

Updated: Jul 10, 2026

Exercise Test for Evaluation of the Functional Efficacy of the Pig Cardiovascular System
02:47

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Published on: May 12, 2023

Exercise Capacity, Endothelial Function, Muscle Mass, and Strength in Pediatric Patients With Fontan Circulation.

Mavis C Lui1, Latha Palaniappan2, Mary B Leonard3

  • 1Department of Pediatrics, Division of Pediatric Cardiology, Stanford University School of Medicine, Stanford, California, USA.

CJC Pediatric and Congenital Heart Disease
|July 9, 2026
PubMed
Summary

In youth with Fontan circulation, reduced aerobic capacity is linked to poorer endothelial function, muscle mass, strength, and mobility. These findings highlight the interconnectedness of cardiovascular, vascular, and musculoskeletal health in this population.

Keywords:
Fontanendothelial functionexercisesingle-ventricle

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Wireless Telemetry Device Implantation in a Fontan Ovine Model for Continuous and Long-Term Hemodynamic Monitoring
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Related Experiment Videos

Last Updated: Jul 10, 2026

Exercise Test for Evaluation of the Functional Efficacy of the Pig Cardiovascular System
02:47

Exercise Test for Evaluation of the Functional Efficacy of the Pig Cardiovascular System

Published on: May 12, 2023

Wireless Telemetry Device Implantation in a Fontan Ovine Model for Continuous and Long-Term Hemodynamic Monitoring
06:29

Wireless Telemetry Device Implantation in a Fontan Ovine Model for Continuous and Long-Term Hemodynamic Monitoring

Published on: May 2, 2025

Area of Science:

  • Pediatric Cardiology
  • Exercise Physiology
  • Vascular Biology

Background:

  • Fontan circulation is associated with significant morbidity and mortality.
  • Impaired exercise capacity, muscle deficits, and endothelial dysfunction contribute to poor outcomes.

Purpose of the Study:

  • To examine the associations between exercise capacity, endothelial function, and muscle parameters in pediatric patients with Fontan circulation.
  • To establish baseline data before a randomized exercise intervention.

Main Methods:

  • 137 participants aged 8-19 years with Fontan circulation underwent assessments.
  • Evaluated cardiopulmonary exercise testing (peak VO2), endothelial function (RHI), body composition (DXA), muscle strength (dynamometry), and functional movement (FMS).

Main Results:

  • Lower peak VO2 correlated significantly with reduced RHI (r=0.50), FMS (r=0.30), and leg lean mass z-score (r=0.25).
  • Aerobic capacity also showed correlations with functional movement and HDL levels.
  • Participants exhibited deficits in muscle mass, strength, and functional mobility.

Conclusions:

  • In youth with Fontan circulation, reduced aerobic capacity is associated with poorer endothelial function, muscle mass, strength, and mobility.
  • These findings underscore the interdependence of cardiovascular, vascular, and musculoskeletal health in this population.