What device is a machine that records the electrical activity of the heart?

What device is a machine that records the electrical activity of the heart?

• A. Electrocardiograph
• B. Electrocardiogram
• C. Electrodes
• D. Interval

Answer: (A)

The question tests understanding of what instrument records the heart’s electrical signals. The device used to capture and print or display that activity is the electrocardiograph. The tracing it produces is called an electrocardiogram (often abbreviated ECG or EKG). Electrodes are the sensors placed on the skin to pick up the signals, and an interval refers to a specific time span on the ECG tracing, not the measuring device. So the machine itself is the electrocardiograph, making it the best answer.

The question tests understanding of what instrument records the heart’s electrical signals. The device used to capture and print or display that activity is the electrocardiograph. The tracing it produces is called an electrocardiogram (often abbreviated ECG or EKG). Electrodes are the sensors placed on the skin to pick up the signals, and an interval refers to a specific time span on the ECG tracing, not the measuring device. So the machine itself is the electrocardiograph, making it the best answer.