Which diagnostic test records the electrical activity of the heart?

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Multiple Choice

Which diagnostic test records the electrical activity of the heart?

Explanation:
Recording the heart’s electrical activity is done with electrocardiography. Surface electrodes placed on the chest and limbs detect the electrical impulses generated as the heart depolarizes and repolarizes, producing an ECG trace with the P wave, QRS complex, and T wave. This tracing provides information on heart rate, rhythm, and conduction, helping identify arrhythmias and other cardiac issues. The other tests measure different things: EEG records brain activity, arteriography visualizes blood vessels with contrast, and Doppler ultrasonography assesses blood flow, not electrical activity.

Recording the heart’s electrical activity is done with electrocardiography. Surface electrodes placed on the chest and limbs detect the electrical impulses generated as the heart depolarizes and repolarizes, producing an ECG trace with the P wave, QRS complex, and T wave. This tracing provides information on heart rate, rhythm, and conduction, helping identify arrhythmias and other cardiac issues. The other tests measure different things: EEG records brain activity, arteriography visualizes blood vessels with contrast, and Doppler ultrasonography assesses blood flow, not electrical activity.

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