cardiac cycle

• The diastole is the phase of the cardiac cycle where the heart relaxes and fills with blood.
• Ventricular relaxation begins when the ventricles start to fill again, causing the pressure inside them to decrease.
• Atrial contraction occurs during ventricular systole, pushing any remaining blood from the atria into the ventricles.
• Atrial contraction occurs during systole, pushing more blood into the ventricles.