MICROANATOMY

Detailed explanation-1: -Diastole (/daɪˈæstəli/ dy-AST-ə-lee) is the relaxed phase of the cardiac cycle when the chambers of the heart are re-filling with blood. The contrasting phase is systole when the heart chambers are contracting. Atrial diastole is the relaxing of the atria, and ventricular diastole the relaxing of the ventricles.

Detailed explanation-2: -Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase. At a normal heart rate, one cardiac cycle lasts for 0.8 second.

Detailed explanation-3: -The cardiac cycle is essentially split into two phases, systole (the contraction phase) and diastole (the relaxation phase).

Detailed explanation-4: -Every time a healthy heart pumps oxygen-rich blood from the lungs into the rest of the body, it goes through two phases-a contracting or pumping phase (called systolic function) and a relaxing phase (called diastolic function).

Detailed explanation-5: -Cardiac muscle relaxation is an essential step in the cardiac cycle. Even when the contraction of the heart is normal and forceful, a relaxation phase that is too slow will limit proper filling of the ventricles. Relaxation is too often thought of as a mere passive process that follows contraction.