Evaluation of QT interval and QT dynamics in healthy male adults following isotonic and isometric exercise

International Journal of Biomedical Research

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Field Value
 
Title Evaluation of QT interval and QT dynamics in healthy male adults following isotonic and isometric exercise
 
Creator Bhattacharjee, Manasi
S, Ramkumar
Kapoor, Raj
 
Subject ECG, QTc interval, QT-RR relationship
 
Description Introduction: Electrocardiogram can be used an objective tool to assess cardiovascular response to physical exercise. The QT interval in ECG denoting ventricular depolarization and repolarization is particularly important in this regard as any change in its duration is known to be associated with arrhythmia. Studies reporting a change in QT duration in the post exercise period have variable results. Cardiac repolarization normally adapts to heart rate; therefore, various rate correction formulas have been used to calculate the corrected QT interval or QTc. Of these Bazzet’s formula and Fridericia formula are commonly used. These correction formulas are best suited for steady state conditions only. Hence, QT dynamics may be a better measure of QT dependence on heart rate in the post exercise period.
Objectives: The aim of the study was to assess changes in QT interval and QT dynamics in healthy male adults following isotonic and isometric exercise.
Materials and Methods: The study was conducted in 30 healthy male subjects. Temporal sequence of QT interval and QT dynamics before and after both isotonic and isometric exercise were measured. QT dynamics was assessed by linear regression analysis method.
Results: The QTc calculated with standard rate correction formulae showed inconsistent values in the post exercise period. The slope of QT-RR relationship increased especially following isotonic exercise.
Conclusion: QT interval duration increases following exercise, although, the degree of change is different for isotonic and isometric exercise.
 
Publisher Scholar Science Journals
 
Date 2020-05-30
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://ssjournals.com/index.php/ijbr/article/view/5394
10.7439/ijbr.v11i5.5394
 
Source International Journal of Biomedical Research; Vol. 11 No. 5 (2020): May; e5394
0976-9633
2455-0566
 
Language eng
 
Relation http://ssjournals.com/index.php/ijbr/article/view/5394/3663
 
Rights Copyright (c) 2020 International Journal of Biomedical Research
http://creativecommons.org/licenses/by/4.0
 

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