Abstract
In this study, the left ventricle and artery were modelled on timevaring elastance and windkessel model respectively. In copulsation mode of left ventricle and left ventricular assist device (LVAD), the sum of the arterial capacitance and the reciprocal of left ventricular elastance which is equivalent to capacitance can be estimated by the time-series analysis of the pneumatic drive pressure and blood output from LVAD, based on the on-line identification method of adaptive control of the pneumatic driver. In animal experiments, it was shown that reciprocal value of the estimated capacitance were correlated with actual Emax, provided that heart rate was stable and less than 120/min.
