What is the diastole phase?
diastole, in the cardiac cycle, period of relaxation of the heart muscle, accompanied by the filling of the chambers with blood. Diastole is followed in the cardiac cycle by a period of contraction, or systole (q.v.), of the heart muscle.
What is diastole in simple terms?
Diastole: The time period when the heart is in a state of relaxation and dilatation (expansion). The diastolic pressure is specifically the minimum arterial pressure during relaxation and dilatation of the ventricles of the heart.
How long is the diastole phase?
Atrial diastole: lasting about 0.7 seconds – relaxation of the atria, during which the atria fill with blood from the large veins (the vena cavae). Ventricular diastole: lasts about 0.5 seconds – begins before atrial systole, allowing the ventricles to fill passively with blood from the atria.
What does the diastole do?
Diastole — this period of time when your heart relaxes between beats — is also the time that your coronary artery is able to supply blood to your heart.
What is diastolic and systolic?
Blood pressure is measured using two numbers: The first number, called systolic blood pressure, measures the pressure in your arteries when your heart beats. The second number, called diastolic blood pressure, measures the pressure in your arteries when your heart rests between beats.
Why is it called diastole?
Diastole (pronounced /daɪˈæstəliː/) is the time during a heart beat when the heart fills with blood after a contraction. The term diastole comes from the Greek word διαστολη. This means expanding or opening.
Is diastole a contraction?
The heartbeat is caused by the heart muscles relaxing and contracting. During this cycle, the period of relaxation is called diastole and the period of contraction is called systole.
Why is diastole longer than systole?
Heart rate is the major determinant affecting diastole and systole duration. Systole is linearly related to heart rate, with the ejection time inversely related to heart rate. Diastole has a more complex relation to heart rate and is longer at low heart rates [6].