A 65-year-old male is transported to the ER for chest pain.An electrocardiogram reveals a prolonged QRS interval.What is the nurse monitoring when the nurse observes the QRS complex on the electrocardiogram? The QRS complex reflects:
A) Ventricular activity
B) Pulmonary artery closure
C) Mitral valve opening
D) Aortic valve closing

Question

Quizplus · Accepted Answer

The QRS complex represents the sum of all ventricular muscle cell depolarizations.
The QRS complex represents the sum of all ventricular muscle cell depolarizations,not the pulmonary artery.
The QRS complex represents the sum of all ventricular muscle cell depolarizations; it does not reflect mitral opening.
The QRS complex represents the sum of all ventricular muscle cell depolarizations; it does not reflect activity of the aortic valve.

A 65-Year-Old Male Is Transported to the ER for Chest