Can anyone give detailed explanation of joint diastole !!!
Joint diastole is a condition when all the four chambers of the heart are at rest or in relaxation. It is also called complete cardiac diastole or early diastole. It takes 0.4 seconds in each cardiac cycle. It is followed by ventricular systole. Atria are already in diastole at this phase, so all the chambers of heart enter the diastolic phase.
Due to the ventricular diastole, ventricles relax and the pressure in the ventricles decreases than that in the great arteries. To prevent the back flow of blood from great arteries to ventricles, the semilunar valves close rapidly.
During complete cardiac diastole, blood from the superior and inferior vena cava flows into the artria. Gradually, the pressure in the ventricles decreases and finally become lower than atrial pressure. The the auriculoventricular valves open and blood from atria starts entering into relaxing ventricles.
The Heart is controlled by the action potential or electrical impulse generated in the Sinoatrial node ( SAN), also called as the pace maker. Cardiac cycle is the sequence of events which occur from the beginning of one heart beat to the beginning of the next heart beat. In the beginning, all the 4 chambers of the heart are in a state of joint diastole...
Joint diastole is experienced & the entire cycle is repeated.
i hope this answer works out