Cardiac cycle

• Atrial diastole


  The atria relax and fill with blood
• Ventricular diastole

  The ventricles relax and blood passively enters
• Atrial systole


  Atria contract, forcing blood into ventricles
• ventricular systole


  Ventricles contract forcing blood to the body and lungs
• Memory hook


  Fill, fill , Impulse, Empty, Impulse, Impulse, Impulse, Empty