Which blood test detects proteins released when heart muscle is damaged?

Which blood test detects proteins released when heart muscle is damaged?

• A. Troponin test
• B. CK-MB test
• C. ESR
• D. Lipase test

Answer: (A)

Troponin is the marker used to detect proteins released when heart muscle is damaged. When cardiac injury occurs, troponin I and troponin T leak into the bloodstream and remain elevated for days, making the troponin test highly sensitive and specific for myocardial injury. Timing matters: levels rise a few hours after injury, peak around 12–24 hours, and can stay elevated for several days. CK-MB is another marker of heart damage but is less specific, since it can rise with skeletal muscle injury as well. ESR is a general inflammation marker, not specific to the heart, and lipase is used for pancreatic issues. So the troponin test is the best choice for detecting heart muscle damage.

Troponin is the marker used to detect proteins released when heart muscle is damaged. When cardiac injury occurs, troponin I and troponin T leak into the bloodstream and remain elevated for days, making the troponin test highly sensitive and specific for myocardial injury. Timing matters: levels rise a few hours after injury, peak around 12–24 hours, and can stay elevated for several days. CK-MB is another marker of heart damage but is less specific, since it can rise with skeletal muscle injury as well. ESR is a general inflammation marker, not specific to the heart, and lipase is used for pancreatic issues. So the troponin test is the best choice for detecting heart muscle damage.