When a client questions the nurse as to the purpose of exercise electrocardiography (ECG) in the diagnosis of cardiovascular disorders, the nurse’s response should be based on the fact that:

When a client questions the nurse as to the purpose of exercise electrocardiography (ECG) in the diagnosis of cardiovascular disorders, the nurse’s response should be based on the fact that:
A . The test provides a baseline for further tests
B . The procedure simulates usual daily activity and myocardial performance
C . The client can be monitored while cardiac conditioning and heart toning are done
D . Ischemia can be diagnosed because exercise increases O2 consumption and demand

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Answer: D

Explanation:

(A) The purpose of the study is not to provide a baseline for further tests.

(B) The test causes an increase in O2 demand beyond that required to perform usual daily activities.

(C) Monitoring does occur, but the test is not for the purpose of cardiac toning and conditioning.

(D) Exercise ECG, or stress testing, is designed to elevate the peripheral and myocardial needs for O2 to evaluate the ability of the myocardium and coronary arteries to meet the additional demands.