Normal ECG and Heart Rate calculation
ECG cycle components Atrial depolarization (P) axis : it is the general direction in which atrial depolarization conducts PR segments : From the end point of P wave to the start point QRS complex PR interval : Summation of P wave and PR segment , From the start point of P wave to the start point of QRS complex Ventricular depolarization (QRS) axis : it is the general direction in which depolarization conducts ST segment : from the end point of S wave to the start point of T wave Ventricular repolarization (T) axis : it is the general