Question

What cardiac biomarker is most sensitive for dx of MI?

a) Troponin I
b) Creatine kinase (CK)
c) Myoglobin
d) Brain natriuretic peptide (BNP)

Answer 1

The most sensitive cardiac biomarker for the diagnosis of MI is Troponin I.

Step-by-step explanation:

The most sensitive cardiac biomarker for the diagnosis of myocardial infarction (MI) is Troponin I. Troponin I is a protein that is released into the blood when there is damage to the heart muscle. It is specific to the heart, making it an excellent indicator of a heart attack. Troponin I levels begin to rise within 3-4 hours after an MI and remain elevated for several days. Other cardiac biomarkers such as creatine kinase (CK), myoglobin, and brain natriuretic peptide (BNP) are also used in the diagnosis of MI, but Troponin I is the most sensitive and widely accepted biomarker.