What is a likely interpretation when there is ST elevation on an ECG in a patient with chest pain?

• A. Myocardial infarction
• B. Pulmonary embolism
• C. Pericarditis
• D. Atrial flutter

Answer: (A)

When a patient with chest pain shows ST elevation on the ECG, it most strongly indicates acute transmural injury from a blocked coronary artery—essentially a myocardial infarction in its STEMI form. The ST segments rise in the leads over the area of the heart that’s affected, often with reciprocal ST depression in opposite leads, signaling that the injury involves the full thickness of the heart wall. This pattern is an emergency requiring urgent evaluation for reperfusion.

Other conditions can cause chest pain or ECG changes, but the classic diffused or concave-upward ST elevations with PR-segment depression across many leads point more toward pericarditis, not STEMI. Pulmonary embolism can produce chest pain and tachycardia and may cause nonspecific ECG changes, but ST elevation is not typical. Atrial flutter is a rhythm disturbance and does not produce ST elevations as a defining feature.

So the interpretation of ST elevation in this context is myocardial infarction due to acute coronary occlusion.