抄録
Our institute has started to develop our own heart assist system, which is composed of heart assist device and control-driving unit. The former is air-driven, diaphragm type, and its assist mode is bypass type from left atrium to descending aorta. The latter is computerized and markedly synchronous with electrocardiogram by a use of T-wave trigger mode. This heart assist system proved excellent pump function on the pressure-load test apparatus.
Acute hemodynamic study using goats showed as follows; (1) Left heart bypass for normal heart increased total output while arterial and left atrial pressure remained unchanged. (2) Left heart bypass for severe heart failure lowered left atrial pressure and left ventricular work while total output and arterial pressure were maintained at reasonable level.
Further improvement of our heart assist system was discussed.
