What does the term "defibrillation" refer to?

• A. Monitoring heart rate
• B. Administering CPR
• C. Delivering an electrical shock to restore normal heart rhythm
• D. Injecting epinephrine

Answer: (C)

Defibrillation refers to the process of delivering an electrical shock to the heart in order to restore a normal heart rhythm. This intervention is crucial in cases of severe cardiac arrhythmias, such as ventricular fibrillation or pulseless ventricular tachycardia, where the heart is not effectively pumping blood. The electrical shock interrupts the chaotic electrical activity of the heart, allowing it to reset and resume a normal rhythm.

Other options presented do not align with the definition of defibrillation. Monitoring heart rate involves tracking how fast the heart beats, which is not a therapeutic intervention. Administering CPR, while critical in emergencies involving cardiac arrest, is a manual technique that involves chest compressions and rescue breaths rather than electrical shocks. Injecting epinephrine is a medication used in various medical emergencies, including cardiac arrest, but it is not related to the act of defibrillation. Therefore, the correct definition of defibrillation centers around the application of an electrical shock to correct abnormal heart rhythms.