抄録
The experimental studies on left ventricular assist circulation (LVAC) using a pulsatile roller pump were carried out to relieve the strain on the failing left ventricle. This pump was attached between the left atrium and descending thoracic aorta in mongrel dogs weighing 14 to 20 kg. Left ventricular bypass pumping was instituted synchronously or asynchronously and hemodynamic changes were detected. The left atrial pressure decreased but was kept not to be in negative pressure. The left ventricular pressure decreased to zero and the systemic pressure was well maintained. But the pulmonary artery pressure increased slightly. Po2 decreased, Pco2 increased gradually and pH of blood decreased during LV bypass pumping.
