Difficulty: Medium
Average Score: 62%
Full-length
Which of the following ECG changes would be seen as a positive myocardial stress test response?
Correct answer
C
Rationale
Hyperacute T waves occur with hyperkalemia. Prolongation of the PR interval occurs with first-degree AV block. Horizontal ST-segment depression of >1 mm during exercise is definitely a positive criterion on the exercise ECG test. Pathological Q waves occur with MI.