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Effect of physical training on corrected QT dispersion in patients with nonischemic heart failure
Yasuhiro Nishiyama1, Hirofumi Maeda, Masafumi Tanaka
1Division of Cardiology, Kurume University Medical Center, Japan.
Background:
The effect of physical training (PT) on QTc dispersion and ventricular tachycardia (VT) remains unclear in patients with nonischemic heart failure.
Methods And Results:
Eight patients with nonischemic heart failure performed PT using a bicycle ergometer and their exercise tolerance increased (4.9+/-1.8 to 7.0+/-2.5 METs, p<0.05) and QTc dispersion decreased (71+/-22 to 48+/-24 ms, p<0.05). However, PT did not change the frequency of VT.
Conclusion:
Physical training could improve QTc dispersion in patients with nonischemic heart failure, possibly by improving the autonomic nerve system.
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Exercise Stress Test
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
