Which labs are checked to diagnose MI?

Which labs are checked to diagnose MI?

• A. Hemoglobin and hematocrit
• B. Blood glucose and lipid panel
• C. D-dimer and CRP
• D. Troponin and CK-MB

Answer: (D)

Diagnosing an MI hinges on proving myocardial injury with cardiac biomarkers. Troponin levels rise specifically in heart muscle injury and are highly sensitive and specific for myocardial damage, making them the primary marker used to diagnose an MI. CK-MB is another heart-specific enzyme that rises with injury and helps confirm the diagnosis and, in some cases, distinguish a new event from a previously injured heart tissue since it returns to baseline sooner than troponin. The other labs don’t directly diagnose an acute MI. Hemoglobin and hematocrit assess blood’s oxygen-carrying capacity and anemia, not myocardial injury. A blood glucose level and lipid panel reflect metabolic risk factors rather than an acute injury event. D-dimer and CRP indicate clotting activity or inflammation but are not specific or definitive for diagnosing an MI. So the combination of troponin and CK-MB directly reflects cardiac muscle injury and is used to diagnose myocardial infarction.

Diagnosing an MI hinges on proving myocardial injury with cardiac biomarkers. Troponin levels rise specifically in heart muscle injury and are highly sensitive and specific for myocardial damage, making them the primary marker used to diagnose an MI. CK-MB is another heart-specific enzyme that rises with injury and helps confirm the diagnosis and, in some cases, distinguish a new event from a previously injured heart tissue since it returns to baseline sooner than troponin.

The other labs don’t directly diagnose an acute MI. Hemoglobin and hematocrit assess blood’s oxygen-carrying capacity and anemia, not myocardial injury. A blood glucose level and lipid panel reflect metabolic risk factors rather than an acute injury event. D-dimer and CRP indicate clotting activity or inflammation but are not specific or definitive for diagnosing an MI.

So the combination of troponin and CK-MB directly reflects cardiac muscle injury and is used to diagnose myocardial infarction.