Diastole (noun)

1. The relaxation of the heart muscle between beats, during which the heart fills with blood.
2. The phase of the cardiac cycle during which the heart's chambers relax and fill with blood.

Origin:

Diastole comes from the greek word "diastole" meaning "expansion" or "dilation".

Examples:

1. During diastole, the heart's chambers fill with blood.
2. The normal range of heart rate during diastole is between 60 and 100 beats per minute.
3. The sound of the blood flow during diastole can be heard through a stethoscope.
4. Diastole is the phase of the cardiac cycle that occurs between systole and the next systole.
5. Drugs that affect diastole can be used to treat hypertension or heart failure.