What happens to the heart's pressure during diastole?

During diastole, the heart undergoes a phase of relaxation after the contraction of the myocardium during systole. As the heart relaxes, the pressure within the chambers of the heart decreases significantly. This decrease in pressure occurs because the heart is filling with blood from the body and the lungs, allowing the atria and ventricles to accommodate the incoming blood volume.

As blood flows into the heart, the ventricles experience a drop in pressure, making this phase crucial for the proper filling of the heart and efficient blood flow. This pressure decline also prevents the heart from overexpanding, maintaining a balance that is vital for effective cardiac function.

Thus, during diastole, the heart's pressure indeed decreases, supporting optimal filling and preparing the heart for the subsequent contraction phase.