ST-segment elevation indicates?

ST-segment elevation indicates?

• A. Injury (infarction)
• B. Normal variant
• C. Pericarditis
• D. Early repolarization

Answer: (A)

ST-segment elevation signals acute myocardial injury to the region of the heart being measured—most often due to transmural ischemia from a coronary artery infarction. When heart muscle is injured, the injury currents shift the baseline, producing an elevated ST segment in the leads facing the affected area. New ST elevations in two or more contiguous leads define a STEMI and require rapid reperfusion because this pattern reflects ongoing, potentially life-threatening myocardial necrosis. This is distinct from benign patterns: early repolarization typically shows mild, concave elevations in younger patients without symptoms; pericarditis often causes diffuse ST elevations with PR-segment depression and may present with peculiar chest pain and possibly a pericardial rub; a normal variant would not show new, regionally concordant ST elevations with clinical symptoms.

ST-segment elevation signals acute myocardial injury to the region of the heart being measured—most often due to transmural ischemia from a coronary artery infarction. When heart muscle is injured, the injury currents shift the baseline, producing an elevated ST segment in the leads facing the affected area. New ST elevations in two or more contiguous leads define a STEMI and require rapid reperfusion because this pattern reflects ongoing, potentially life-threatening myocardial necrosis.

This is distinct from benign patterns: early repolarization typically shows mild, concave elevations in younger patients without symptoms; pericarditis often causes diffuse ST elevations with PR-segment depression and may present with peculiar chest pain and possibly a pericardial rub; a normal variant would not show new, regionally concordant ST elevations with clinical symptoms.