Question

Which of the following is a record of the waves of electrical impulses responsible for the cardiac cycle?

1) Electrocardiogram (ECG)
2) Echocardiogram
3) Cardiac catheterization
4) Cardiac MRI

Answer 1

An electrocardiogram (ECG) is a record of the waves of electrical impulses responsible for the cardiac cycle.

Step-by-step explanation:

An electrocardiogram (ECG) is a record of the waves of electrical impulses responsible for the cardiac cycle.

The ECG is obtained by placing electrodes on the skin, which detect and record the electrical activity of the heart. It shows the depolarization and repolarization of the atria and ventricles, represented by the P wave, QRS complex, and T wave.

Therefore, the correct answer is 1) Electrocardiogram (ECG).