Question

lo 3.4. what does the electrocardiogram measure?
kidneys
lungs
liver
heart
intestines

Explanation:

An electrocardiogram (ECG or EKG) is a medical test that measures the electrical activity of the heart. It records the heart's rhythm and any abnormalities in its electrical conduction system. The other options (kidneys, lungs, liver, intestines) are organs whose functions are not directly measured by an electrocardiogram.

Answer:

Heart