The QRS complex in a standard ECG represents:

Step-by-step solution

An electrocardiogram (ECG), is a graphical representation of the electrical activity of the heart during a cardiac cycle. The machine used to obtain an electrocardiogram is known as electrocardiography and this technique is called electrocardiography. The interpretation of ECG is as follows: • The P wave is a small upward wave that represents electrical excitation (or depolarization) of the atria which leads to contraction of both the atria. • The QRS (wave) complex represents the depolarization of the ve