Why the study?
Does the Valsalva maneuver increase QT dispersion in patients with ischemic heart diseases compared to those with normal coronary arteries?
Does the Valsalva maneuver increase QT dispersion in patients with ischemic heart diseases compared to those with normal coronary arteries?
The Valsalva maneuver significantly increases QT dispersion in patients with ischemic heart disease, suggesting that activities increasing intrathoracic pressure should be minimized in this population to reduce arrhythmia risk.
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Valsalva was associated with increased QT dispersion in angina; hypothesis-generating for arrhythmia risk and requires prospective validation before any practice implications.
Balbay et al. (2001) studied this question.
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