Question

A patient present to the emergency room with Left sided chest pain, that radiates to the neck and left arm, diaphoresis, feeling of impending doom and anxiety. Patient tells you that a week ago he was hospitalized for having an infarction and he is very scared he might be having another one. Which of the following cardiac enzymes would be more accurate in diagnosing a RE-infarction in this patient? A) Troponin I B) LDH C) CK-MB D) B-HCG

Answer 1

A) Troponin I

Cardiac markers are clinically important as providing information about cardiac functioning. Although most of the cardiac markers are enzymes, non-enzymatic cardiac markers such as “troponin” are also used.

The three cardiac enzyme markers are,

• Troponin T
• Creatinine-kinase (CK-MB) test
• Troponin I

Troponin T and troponin I are the important cardiac marker in myocardial damage. The cardiac troponin I (cTnI) is most useful in the diagnosis of cardiac re-infarction.