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Body Surface Potential Mapping during Ventricular Depolarization in Rats after Acute Exhaustive Exercise
Alexey G Ivonin1, Svetlana L Smirnova1, Irina M Roshchevskaya1,2
1Department of Comparative Cardiology - Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences , Syktyvkar - Federação Russa.
Arquivos Brasileiros De Cardiologia
|September 14, 2022
Summary
Acute exhaustive exercise in rats temporarily alters heart electrical activity during ventricular depolarization. These changes in body surface potential maps (BSPMs) are reversible within 10 minutes post-exercise.
Area of Science:
- Cardiology
- Exercise Physiology
- Electrophysiology
Background:
- Exhaustive physical exercise can significantly impact myocardial electrical properties.
- Understanding these effects is crucial for assessing cardiac health in athletes.
Purpose of the Study:
- To investigate the effects of acute exhaustive exercise on cardiac electrical activity during ventricular depolarization in rats.
- To utilize body surface potential mapping (BSPM) for detailed analysis.
Main Methods:
- Male rats underwent treadmill exercise until exhaustion.
- Unipolar electrocardiograms (ECGs) and BSPMs were recorded before and after exercise.
- Analysis focused on ventricular depolarization phases and potential distribution.
Main Results:
- Post-exercise, rats showed earlier ventricular depolarization completion and altered BSPM patterns.
- Specific changes included decreased depolarization duration and modified potential amplitudes.
- These alterations were not present 10 minutes after exercise, indicating reversibility.
Conclusions:
- Acute exhaustive exercise induces transient, reversible changes in cardiac electrical activity during ventricular depolarization in rats.
- These findings suggest exercise-induced alterations in myocardial excitation patterns.
