Pitfalls in diagnosing ST elevation among patients with acute myocardial infarction.

Objectives: Patients with ST elevation (STE) in ≥ 2 leads or ST depression (STD) confined to V₁-V₄ are defined as potential STE myocardial infarction (STEMI). We evaluated the incidence of missed STEMI over an 11-month period.

Methods: Consecutive patients with a discharge diagnosis of non STEMI were retrospectively evaluated.