Which of the following statements is correct ?

Options

A. The T-wave in an ECF represent excitation of ventricles
B. The sum of P and T waves in a given time period can determine that heart beat rate of an individual
C. The end of the P-wave marks the end of the systole
D. In a standard ECG, a person is connected to the machine with three electrical leads.

Answer

D

Explanation

In a standard ECG, a patient is connected to the machine with three electrical leads, one to each wrist and one to the left ankle.