Which ECG finding is diagnostic of STEMI?

Prepare for the Emergency Nursing Orientation 3.0 Cardiovascular Emergencies Test. Use interactive flashcards and detailed explanations with multiple choice questions. Enhance your understanding of cardiovascular emergencies and succeed on your exam!

Multiple Choice

Which ECG finding is diagnostic of STEMI?

STEMI is diagnosed on the ECG by acute, persistent ST-segment elevation in two or more contiguous leads, occurring with new ischemic symptoms. The standard thresholds are at least 1 mm of ST elevation in limb leads or at least 2 mm in most precordial leads. The requirement for new onset symptoms helps confirm the event is acute rather than a chronic pattern. While new left bundle branch block can raise concern for a STEMI, the definitive diagnostic criterion remains ST elevation in contiguous leads, not the presence of LBBB alone. T-wave inversions without concurrent ST elevation do not diagnose STEMI. So the statement that matches the diagnostic criteria is ST elevation meeting those thresholds in contiguous leads with new onset symptoms.

STEMI is diagnosed on the ECG by acute, persistent ST-segment elevation in two or more contiguous leads, occurring with new ischemic symptoms. The standard thresholds are at least 1 mm of ST elevation in limb leads or at least 2 mm in most precordial leads. The requirement for new onset symptoms helps confirm the event is acute rather than a chronic pattern. While new left bundle branch block can raise concern for a STEMI, the definitive diagnostic criterion remains ST elevation in contiguous leads, not the presence of LBBB alone. T-wave inversions without concurrent ST elevation do not diagnose STEMI. So the statement that matches the diagnostic criteria is ST elevation meeting those thresholds in contiguous leads with new onset symptoms.

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