Fig. 7
The mean pulsatile ratio and external work. a PR of pulmonary artery pressure with constant speed, co-pulse and counter-pulse of LVAD and LVAD with β-blocker; b PR of arterial pressure with constant speed, co-pulse and counter-pulse of LVAD and LVAD with β-blocker; c EW of left ventricular with constant speed, co-pulse and counter-pulse of LVAD and LVAD with β-blocker