The first myocardial marker to elevate following the onset of MI symptoms is ______.The concern with this marker is ______.

Question

Quizplus · Accepted Answer

Myoglobin is the first marker to elevate following a myocardial infarction.A rise in myoglobin is detectable in blood as early as 1 to 2 hours after onset of symptoms; it is highly sensitive for MI diagnosis and effective for rule-out in the 2- to 6-hour timeframe after onset of symptoms.Myoglobin is located in both cardiac and skeletal muscle, limiting its diagnostic specificity.

The First Myocardial Marker to Elevate Following the Onset of MI