Definition LV filling occurs during diastole, which has 4 phases: (1) isovolumic relaxation; (2) rapid filling phase; (3) slow filling, or diastasis; and (4) final filling during atrial systole (atrial kick.) Cardiac Cycle Isovolumic relaxation – this phase occurs after the aortic valve closes and the mitral valve is still closed. LV relaxation is energy […]