MDCAT Biology MCQ #2121

A person's electrocardiogram (ECG) shows a prolonged PR interval. What does this indicate?

MDCAT Biology MCQ #2121

  1. Question 1

    Q1. A person's electrocardiogram (ECG) shows a prolonged PR interval. What does this indicate?

    • A) First-degree AV block
    • B) Second-degree AV block
    • C) Bundle branch block
    • D) Ventricular tachycardia

    Answer: First-degree AV block

    Explanation: Prolonged PR interval indicates delayed AV conduction, characteristic of first-degree AV block.