Which diagnostic test records the electrical activity of the heart and helps identify conduction abnormalities, cardiac arrhythmias, and myocardial ischemia?

Which diagnostic test records the electrical activity of the heart and helps identify conduction abnormalities, cardiac arrhythmias, and myocardial ischemia?

• A. Fluoroscopy
• B. Electromyography
• C. Electrocardiography
• D. Electroencephalography

Answer: (C)

Recording the heart’s electrical activity is what electrocardiography does. By using surface electrodes, it captures the impulses that coordinate the heartbeat, producing a tracing of atrial and ventricular depolarization and repolarization. This pattern helps identify conduction abnormalities (like blocks or delays), cardiac arrhythmias (irregular rhythms or extra beats), and myocardial ischemia (ST-segment changes and T-wave alterations). Among the options, this test specifically measures the heart’s electrical activity, unlike fluoroscopy (imaging anatomy with X-rays), electromyography (muscle electrical activity), or electroencephalography (brain electrical activity).

Recording the heart’s electrical activity is what electrocardiography does. By using surface electrodes, it captures the impulses that coordinate the heartbeat, producing a tracing of atrial and ventricular depolarization and repolarization. This pattern helps identify conduction abnormalities (like blocks or delays), cardiac arrhythmias (irregular rhythms or extra beats), and myocardial ischemia (ST-segment changes and T-wave alterations). Among the options, this test specifically measures the heart’s electrical activity, unlike fluoroscopy (imaging anatomy with X-rays), electromyography (muscle electrical activity), or electroencephalography (brain electrical activity).