Viser at HRV er størst ved 5-6 pust i minuttet.

http://www.sciencedirect.com/science/article/pii/S1566070201002673

Respiration is a powerful modulator of heart rate variability, and of baro- and chemoreflex sensitivity. Abnormal respiratory modulation of heart rate is often an early sign of autonomic dysfunction in a number of diseases.

This review examines the possibility that manipulation of breathing pattern may provide beneficial effects in terms not only of ventilatory efficiency, but also of cardiovascular and respiratory control in physiologic and pathologic conditions, such as chronic heart failure.

Fig. 2. Heart rate variability is maximal when respiration slows down in the low-frequency range, and particularly at 0.1 Hz (equivalent to 6 breaths/min).