Abstract
It has been reported that the index maxVCE Which represents myocardial contractility, can be measured in clinical cases from the pressure patterns recorded by catheter-tip pressure transducers. In this study the values of maxVCE Were calculated from the recordings obtained through a metal cannula inserted directly into the left ventricle and those obtained through an usual catheter connected directly to a pressure transducer on animal experiments. A high significance of correlation (r = 0.98) was observed between these values obtained by two different methods, and it was concluded that intraventricular pressure and dp/dt patterns accurate enough to allow the calculation of maxVCE could be obtained by usual catheters connected to pressure transducers directly.
