Key result
Lead aVR ST elevation ≥ V1 distinguishes acute LMCA from LAD obstruction with ~81% sensitivity.
Why the study?
Predicting acute left main coronary artery obstruction is important for selecting treatment strategies because it causes severe hemodynamic deterioration and worse prognosis, but associated ECG features needed evaluation.
Does 12-lead electrocardiography predict acute left main coronary artery obstruction in patients with acute coronary obstruction?
Observational (n=86)
Does 12-lead electrocardiography predict acute left main coronary artery obstruction in patients with acute coronary obstruction?
Absolute Event Rate: 88% vs 43%
Lead aVR ST segment elevation with less ST segment elevation in lead V1 is a strong predictor of acute LMCA obstruction and is associated with higher mortality.
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May aid early risk stratification in ACS; leaves open whether aVR-guided strategies improve outcomes without prospective validation.
Yamaji et al. (2001) conducted an observational in Acute coronary artery obstruction (n=86). Acute left main coronary artery (LMCA) obstruction vs. Acute left anterior descending (LAD) coronary artery obstruction was evaluated on Lead aVR ST segment elevation (>0.05 mV). Lead aVR ST segment elevation greater than or equal to lead V1 ST segment elevation distinguished acute LMCA obstruction from LAD obstruction with 81% sensitivity and 80% specificity.
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