Penumbral role of beta blockade on heart rate recovery in heart failure

Summary We would agree that Heart Rate Variability ( HRR ) is a measure of parasympathetic activity, which may need to be augmented in chronic management of Heart Failure ( HF ). A viable next step would be the determination of the relative strength of the sympathetic response versus the decrease of parasympathetic tone in HF , while taking into consideration the suppression of the sympathetic nervous system by virtue of Beta Blockade, which constitutes standard therapy.