Question

Which instrument is used to measure the electrical activity of the heart?

• A. ECG
• B. EMG
• C. EEG
• D. Thermometer

Hint:

To remember: C in ECG stands for Cardio (Heart). M in EMG stands for Muscle. E in EEG stands for Encephalo (Brain).

Answer 1

The Correct Option is A

Biomedical instrumentation uses various specialized sensors and electrodes to monitor the physiological signals of the human body. 1. Identifying the Heart's Signal: The heart operates via electrical impulses that trigger the contraction of cardiac muscle. The recording of this electrical activity over a period of time using electrodes placed on the skin is known as Electrocardiography.

2. Analyzing the Options:

• ECG (Electrocardiogram): Specifically designed to detect and amplify the tiny electrical changes on the skin that arise from the heart muscle's electrophysiologic pattern of depolarizing and repolarizing during each heartbeat.

• EMG (Electromyogram): Used to measure the electrical activity of skeletal muscles.

• EEG (Electroencephalogram): Used to record electrical activity of the brain (brain waves).

• Thermometer: A device used to measure temperature, not electrical activity.

3. Conclusion: The ECG is the primary diagnostic tool used in cardiology to assess the heart's rate, rhythm, and the presence of any damage or abnormalities in the cardiac conduction system.