Which of the following ECG changes would be seen as a positive myocardial stress test response?

Which of the following ECG changes would be seen as a positive myocardial stress test response?
A . Hyperacute T wave
B . Prolongation of the PR interval
C . ST-segment depression
D . Pathological Q wave

View Answer

Answer: C

Explanation:

(A) Hyperacute T waves occur with hyperkalemia.

(B) Prolongation of the P R interval occurs with first-degree AV block.

(C) Horizontal ST-segment depression of>1 mm during exercise isdefinitely a positive criterion on the exercise ECG test.

(D) Patho-logical Q waves occur with MI.