A client scheduled for cardiac catheterization is anxious and asks the nurse the reason for this test. What is the nurse's best response?

Cardiac catheterization is usually done to assess how blocked or open a client's coronary arteries are.

Cardiac catheterization is most commonly done to detect how efficiently a client's heart muscle contracts.

Cardiac catheterization is most commonly done to evaluate cardiac electrical activity.

Cardiac catheterization is usually done to evaluate cardiovascular response to stress.