Acute Coronary Occlusion

Acute coronary occlusion (ACO) requires a shift from traditional STEMI/NSTEMI categorization toward an OMI (Occlusion MI) versus NOMI (Non-occlusion MI) paradigm to improve diagnostic sensitivity. Approximately 25-30% of high-risk patients with acute coronary occlusion fail to meet traditional STEMI criteria, necessitating a broader clinical approach. Key diagnostic tools include the Smith-modified Scarbosa criteria, identification of hyperacute T waves, posterior STEMI patterns, and the De Winter sign. Clinicians should utilize repeat EKGs, monitor for harbingers like AVR elevation and Wellen’s syndrome, and employ point-of-care ultrasound to detect regional wall motion abnormalities. Management hinges on early aspirin administration, oxygen therapy restricted to hypoxic patients, and timely reperfusion via PCI or thrombolytics when transfer times exceed 120 minutes. This approach empowers providers to identify occlusions that standard guidelines often overlook, ultimately improving patient outcomes in emergency settings.