Question

Which of the following are true about ECG machines? Check all of the boxes that apply.

They use electrodes.

They are used to assist doctors in the diagnosis of possible heart problems.

They use magnets to produce images of soft tissues.

They are never used while a patient is exercising.

Answer 1

Select the true statements:

- ✅ They use electrodes.
(ECGs record the heart’s electrical activity via surface electrodes.)

- ✅ They are used to assist doctors in the diagnosis of possible heart problems.
(ECGs help detect arrhythmias, heart attack, conduction problems, etc.)

- ⬜ They use magnets to produce images of soft tissues. — False.
(MRI uses magnets; ECG records electrical signals.)

- ⬜ They are never used while a patient is exercising. — False.
(ECGs are commonly used during exercise stress tests to evaluate exercise‑induced changes.)