To indicate myocardial ischemia, two anatomically contiguous leads must show the ST segment to be ________.
A)Elevated by at least 1 mm
B)Elevated by at least 3 mm
C)Depressed by at least 1 mm
D)Depressed by at least 3 mm

Question

Quizplus · Accepted Answer

Myocardial ischemia is indicated by ST segment depression of at least 1 mm in two anatomically contiguous leads. ST segment elevation is typically indicative of myocardial infarction, rather than ischemia. Therefore, choices A and B are incorrect. A depression of at least 3 mm is more indicative of ST segment depression associated with a myocardial infarction, rather than ischemia. Therefore, choice D is also incorrect.

To Indicate Myocardial Ischemia, Two Anatomically Contiguous Leads Must Show