The cardiac cycle refers to the sequence of mechanical and electrical events that repeats with every heartbeat. It includes the phase of relaxation diastole and the phase of contraction systole. #cardiaccycle #heart #cardiology #physiology #ecg #ekg #pathology #usmle #usmlestep1 #usmlestep2 #doctor #doctordconline #nhs #nurse #nursing #mbbs #md #medlife @doctordconline #amc #plab #hospital














