What test records the electrical activity of the heart?

• A. Troponin
• B. EKG (Electrocardiogram)
• C. Pan Scan
• D. GCS (Glasgow Coma Scale)

Answer: (B)

The test that records the heart’s electrical activity is the electrocardiogram. It tracks the electrical impulses that coordinate each heartbeat, providing a graph of the heart’s rhythm and rate. By looking at the waveform, you can see when the atria and ventricles depolarize and repolarize, which helps detect arrhythmias, conduction problems, and signs of ischemia or injury.

Troponin measures a protein released when heart muscle is damaged, so it indicates injury rather than electrical activity. A Pan Scan is a body imaging CT scan used to visualize anatomy, not electrical signals. The Glasgow Coma Scale assesses consciousness level, not heart electrical activity.