[Intracardiac nervous regulation of the systolic and diastolic activity of isolated heart ventricle].

In isolated hearts of cats and frogs, sistolic and diastolic pressure in the ventricle, volume speed, speed of contraction and relaxation, and indexes of contractability and elasticity, were estimated during stretching of the venous receptacle. The data showed that the stretching increased both the sistolic and diastolic activities of the ventricle. Shunting off of the intracardial nervous apparatus prevented these interrelationships. The increase in the ventricle sistolic and diastolic activities due to stimulation of mechanoreceptors of the heart venous receptacles can be regarded as the display of a regulatory activity of intracardial nervous system related to changes of the blood volume coming to the venous receptacles.