In the precordial leads,V1's QRS complex
A)Should be a primarily negative deflection.
B)Should be a primarily positive deflection.
C)Should be isoelectric.
D)Represents atrial depolarization.

Question

Quizplus · Accepted Answer

V1's QRS complex should be a primarily negative deflection. This is because the electrode for V1 is placed at the 4th intercostal space, just to the right of the sternum, which is close to the right ventricle. Therefore, the initial electrical activity of the right ventricle is directed away from this electrode and results in a predominantly negative QRS complex in V1.

In the Precordial Leads,V1's QRS Complex