Which of the following are differences between cardioversion and defibrillation?
I. In cardioversion, the countershock is synchronized with the R wave.
II. In defibrillation, more energy is applied.
III. In cardioversion, the countershock is synchronized with the R wave.
IV. In defibrillation, more energy is applied.

Question

Which of the following are differences between cardioversion and defibrillation?
I.	In cardioversion, the countershock is synchronized with the R wave.
II.	In defibrillation, more energy is applied.
III.	In cardioversion, the countershock is synchronized with the R wave.
IV.	In defibrillation, more energy is applied.

Quizplus · Accepted Answer

Cardioversion and defibrillation both involve the delivery of an electric shock to the heart but they differ in their technique and purpose. In cardioversion, the shock is synchronized with the R wave of the heart's electrical activity to restore a normal heart rhythm in a patient with an abnormal rhythm such as atrial fibrillation. In defibrillation, the shock is delivered without synchronization to restore the heart's rhythm in a patient with a life-threatening arrhythmia such as ventricular fibrillation. More energy is typically required in defibrillation than in cardioversion to achieve a successful restoration of rhythm. Therefore, statements I and II are true for cardioversion and defibrillation, respectively.

Which of the Following Are Differences Between Cardioversion and Defibrillation