Abstract
Background: The deceleration in heart rate immediately after exercise is an index of parasympathetic tone that is known to be associated with clinical outcomes in coronary heart disease populations. Decreased parasympathetic tone is thought to be associated with increased mortality risk in heart failure, but there are few existing data on post-exercise heart rate recovery in patients with chronic heart failure. Methods: We measured post-exercise heart rate recovery after maximal symptom-limited treadmill exercise in 205 subjects with NYHA class I-III chronic heart failure (age range 17–79 years).
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