Question

For the healthy adult patient, which of the following describes the pattern of the anticipated QRS complex in lead V4?

a) Upright and rounded
b) Inverted and peaked
c) Absent
d) Flat and irregular

Answer 1

The anticipated QRS complex in lead V4 for a healthy adult is upright and rounded, reflecting normal ventricular depolarization during heart function.

Step-by-step explanation:

For a healthy adult patient, the pattern of the anticipated QRS complex in lead V4 is generally upright and rounded. The QRS complex represents ventricular depolarization, which is the electrical activity associated with the contraction of the ventricles as they pump blood to the lungs and body. The typical shape and time span of the QRS complex are due to the complex shape of the heart and the pathway of the depolarization wave. It is important to note that ECG abnormalities such as atrial fibrillation or third-degree block cause alterations in the QRS complex's appearance or its correlation with other electrical activity in the heart.