A 65-year-old male is transported to the ER for chest pain. An electrocardiogram reveals a prolonged QRS interval. This result indicates:
A) increased ejection time.
B) increased isovolumetric contraction time.
C) mitral valve opening.
D) aortic valve closing.

Question

Quizplus · Accepted Answer

A prolonged QRS interval on an electrocardiogram indicates an increased isovolumetric contraction time, which may be indicative of a conduction abnormality within the heart's electrical system. This can lead to impaired ventricular function and decreased cardiac output.

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