Recovery of heart rate variability and ventricular repolarization indices following exercise.

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Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc, ISSN: 1542-474X, Vol: 17, Issue: 4, Page: 349-60

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PMC3481193; 3481193
Lahiri, Marc K; Chicos, Alexandru; Bergner, Dan; Ng, Jason; Banthia, Smirti; Wang, Norman C; Subačius, Haris; Kadish, Alan H; Goldberger, Jeffrey J
Wiley-Blackwell; Futura Pub. Co.; Touro Scholar
Medicine; Age Distribution; Arrhythmias; Cardiac; Body Mass Index; Coronary Artery Disease; Electrocardiography; Exercise; Exercise Test; Female; Heart Conduction System; Heart Rate; Humans; Male; Middle Aged; Risk Factors; Sex Distribution; Stroke Volume; Arrhythmias, Cardiac; Cardiology
article description
There is a heightened risk of sudden cardiac death related to exercise and the postexercise recovery period, but the precise mechanism is unknown. We have demonstrated that sympathoexcitation persists for ≥45 minutes after exercise in normals and subjects with coronary artery disease (CAD). The purpose of this study is to determine whether this persistent sympathoexcitation is associated with persistent heart rate variability (HRV) and ventricular repolarization changes in the postexercise recovery period.