Which term is the process of recording the heart's electrical activity?

• A. Endarterectomy
• B. Encephalitis
• C. Electromyogram
• D. Electrocardiography

Answer: (D)

Recording the heart’s electrical activity is described by electrocardiography. This term combines electro- (electric) with cardio- (heart) and -graphy (the process of recording). An electrocardiogram captures the heart’s rhythm and conduction, producing the tracing used to assess heart function. The other terms refer to different things: endarterectomy is surgical removal of plaque from an artery, encephalitis is brain inflammation, and electromyogram records electrical activity of muscles. So electrocardiography is the correct term for the heart’s electrical activity.