What does an ECG measure?

The electrical activity of the heart

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The blood pressure

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The pumping action of the heart

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The blood volume

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Solution

The correct option is A
The electrical activity of the heart

ECG or an electrocardiogram is used to obtain a graphical record of the electrical current that is produced by the electrical activity and excitation of the heart. An ECG is obtained by leads or electrodes placed on the body that detect electrical impulses passing through the skin, but originate from the heart.

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