Which of the following are characteristics of the normal ST segment?
I.The ST segment is normally flat, lying on the baseline.
II.This segment may be elevated as much as 2 mm above the baseline.
III.This segment may be depressed as much as 2 mm below the baseline.
IV.An ST segment that becomes depressed more than 0.5 mm is abnormal.

Question

Quizplus · Accepted Answer

The ST segment is normally flat, lying on the baseline. However, this segment may be elevated as much as 2 mm above the baseline or depressed as much as 0.5 mm below the baseline and still be considered normal. An ST segment that becomes depressed more than 0.5 mm during a stress exercise test signals myocardial ischemia.

Which of the Following Are Characteristics of the Normal ST