Which finding is most characteristic of STEMI?

Which finding is most characteristic of STEMI?

• A. Serial ECG indicates elevation of ST segment
• B. Prolonged Chest Pain
• C. Bibasilar rales
• D. S4 heart sound

Answer: (A)

STEMI is defined by acute transmural myocardial infarction, and the hallmark finding is new ST-segment elevation on the ECG, often best seen and confirmed when you obtain serial ECGs during the acute event. Seeing evolving ST elevations across contiguous leads is what signals that a full-thickness myocardial injury is occurring, guiding urgent reperfusion treatment. Other findings like chest pain that lasts a long time can occur in many conditions, bibasilar rales point to fluid overload or heart failure rather than the infarct itself, and an S4 heart sound reflects diastolic dysfunction or chronic pressure overload rather than the acute electrical pattern of STEMI.

STEMI is defined by acute transmural myocardial infarction, and the hallmark finding is new ST-segment elevation on the ECG, often best seen and confirmed when you obtain serial ECGs during the acute event. Seeing evolving ST elevations across contiguous leads is what signals that a full-thickness myocardial injury is occurring, guiding urgent reperfusion treatment. Other findings like chest pain that lasts a long time can occur in many conditions, bibasilar rales point to fluid overload or heart failure rather than the infarct itself, and an S4 heart sound reflects diastolic dysfunction or chronic pressure overload rather than the acute electrical pattern of STEMI.