The most reliable indicator that a person is experiencing an acute myocardial infarction (MI)is
A) severe, crushing chest pain.
B) ST-segment elevation.
C) dysrhythmias.
D) pain radiating to the lower legs.

Question

Quizplus · Accepted Answer

Injuries to cardiac tissue caused by myocardial ischemia and infarction are indicated on the ECG by ST-segment changes.ST-segment elevation on the ECG indicates that ischemic injury is ongoing and that efforts to improve perfusion or reduce oxygen demand may be effective in preserving myocardial muscle.In some instances,an MI is entirely asymptomatic.Dysrhythmias that accompany MI are attributed to injured and ischemic cells that have not yet become necrotic.Pain radiating to the jaw and neck,not the lower legs,is symptomatic of an MI.

The Most Reliable Indicator That a Person Is Experiencing an Acute