Fig. 1From: Optimization of pressure settings during adaptive servo-ventilation support using real-time heart rate variability assessment: initial case reportTime course of haemodynamics and autonomic nerve activity during the PEEP ramp test. PEEP, peak end-expiratory pressure; ASV, adaptive servo-ventilation; PCWP, pulmonary capillary wedge pressure; CI, cardiac index; LF, low-frequency; HF, high-frequency; NOR, noradrenalinBack to article page