The Nurse Is Caring for a Patient Admitted with Angina

The nurse is caring for a patient admitted with angina who is scheduled for cardiac catheterization. The patient is anxious and asks the reason for this test. What is the best response?

A) Cardiac catheterization is usually done to assess how blocked or open a patients coronary arteries are.
B) Cardiac catheterization is most commonly done to detect how efficiently a patients heart muscle contracts.
C) Cardiac catheterization is usually done to evaluate cardiovascular response to stress.
D) Cardiac catheterization is most commonly done to evaluate cardiac electrical activity.