MDCAT Physics MCQ #724

A patient with a faulty pacemaker is experiencing cardiac arrest. What would be the primary effect of an electrical defibrillator?

MDCAT Physics MCQ #724

  1. Question 1

    Q1. A patient with a faulty pacemaker is experiencing cardiac arrest. What would be the primary effect of an electrical defibrillator?

    • A) Increased atrial pressure
    • B) Cardiac muscle depolarization
    • C) Increased heart rate variability
    • D) Blockage of cardiac sodium channels

    Answer: Cardiac muscle depolarization

    Explanation: Defibrillator shock causes depolarization of cardiac muscle fibers to interrupt abnormal heart rhythms.