This four-minute video can make you understand the difficult concept of cardiac cycle. Animated version of the graphical representation of cardiac cycle will definitely help you memorize it. Timeline 0:00 Introduction 0:04 Definition 0:11 Phases of cardiac cycle 0:29 Basic principles 1:02 Atrial contraction 2:02 Isovolumetric contraction 2:30 Rapid ejection 2:43 Reduced ejection 3:12 Isovolumetric relaxation 3:32 Ventricular filling