Abstract
Effects of balloon inflation pressure, volume, and inflation duration on the hemodynamics were studied in vitro using a mock circulator and in vivo with 7 mongrel dogs. The results obtained are: (1) Excessive inflation pressure greater than 40mmHg above the mean aortic pressure is not necessary for the improvement of the hemodynamics; (2) In vitro study showed that the increase in balloon volume was effective to improve the hemodynamics, although the endocardial viability ratio was not increased in the animal experiments; (3) The increase of the inflation duration induced a greater augmentative effect.
