If the ST segment drops 3 mm during exercise,it is evidence of
A)Old MI.
B)Myocardial ischemia.
C)J-point elevation.
D)Ventricular tachycardia.

Question

Quizplus · Accepted Answer

A drop in the ST segment during exercise is a sign of myocardial ischemia, which occurs when the heart muscle does not receive enough oxygenated blood. This can be an indicator of underlying coronary artery disease. A drop of 1 mm or more is considered significant, and a drop of 3 mm is particularly concerning. Old MI (A) would likely show up as Q waves on an ECG, and J-point elevation (C) is not typically associated with exercise. Ventricular tachycardia (D) would show up as a rapid, abnormal heart rhythm on an ECG, but not necessarily with ST segment changes.

If the ST Segment Drops 3 Mm During Exercise,it Is