OMI Pattern

Weekly Workout June 22, 2026

Four ECGs Hiding a High-Risk Coronary Pattern

A 56-year-old man presents with 1 week of concerning chest pain and shortness of breath. His ECG does not meet conventional STEMI criteria, but it shows subtle ST-segment abnormalities in…

ECG STAT June 7, 2026

Aslanger Pattern: OMI Pattern

Key Points: Aslanger pattern is an OMI pattern that can identify acute inferior occlusion despite not meeting traditional STEMI criteria. The key finding is ST segment elevation isolated to lead…

ECG STAT April 17, 2026

New RBBB + LAFB (Bifascicular Block) in ACS: OMI Pattern

Key Points: In a patient with ischemic symptoms, new RBBB + LAFB should raise concern for proximal LAD or septal ischemia until proven otherwise, especially if the patient has ongoing…

ECG STAT April 1, 2026

ST Elevation in aVR with Diffuse ST Segment Depression: OMI Pattern

Key Points: Pattern, not a STEMI equivalent. ST elevation in aVR (≥1 mm), often with ST elevation in V1 and diffuse ST depression (≥1 mm in ≥6 leads), represents high-risk…

ECG STAT March 20, 2026

South African Flag Sign: OMI Pattern

Key Points: Pattern: The South African Flag sign is the combination of ST elevation in I, aVL, and V2 with reciprocal ST depression in III. It is a subtle but…

ECG STAT January 11, 2026

Occlusion MI: STEMI Criteria & Beyond

Key Points: The ECG’s primary role in ACS is detecting acute coronary occlusion. Acute coronary occlusion myocardial infarction (OMI) is a time-critical diagnosis that requires immediate reperfusion. Time is myocardium….

ECG STAT January 11, 2026

STEMI (-) Occlusion MI: OMI Patterns

Key Points: Traditional STEMI criteria miss many acute coronary occlusions. A substantial proportion of true OMIs do not meet classic millimetric STEMI thresholds. OMI is a pathophysiologic diagnosis, not an…

ECG STAT January 1, 2026

ST Depression V1-V4: OMI Pattern

Key Points: Most missed occlusion MI. Isolated posterior occlusion MI is frequently missed because the standard 12-lead ECG often lacks ST elevation. Instead, posterior injury appears as reciprocal anterior ST…

ECG STAT December 17, 2025

Earliest Evidence of Occlusion MI

Key Points: ACS is dynamic. Coronary arteries can occlude, partially reperfuse, and re-occlude over minutes to hours, and the ECG can show these shifts before biomarkers do. The earliest actionable…

ECG STAT December 17, 2025

Early Reciprocal Changes: OMI Pattern

Key Points: STEMI criteria alone miss some acute coronary occlusions, so look for subtle “occlusion clues,” not just traditional STEMI criteria cutoffs. Minor ST elevation under 1 mm paired with…

ECG STAT September 1, 2025

Hyperacute T Waves: OMI Pattern

Key Points: Complexity of ACS: Arteries can spontaneously reperfuse or re-occlude. Understanding early ECG patterns of early acute ischemia can help detect dynamic changes and prompt rapid interventions. ECG Pattern…

ECG STAT July 17, 2025

Terminal QRS Distortion: OMI Pattern

Key Points: What it is: In V2 or V3, there is no S wave (the R does not descend below the PQ baseline) and no J wave (no notch/slur at…

Weekly Workout April 28, 2025

Aslanger’s Pattern and the Limits of Traditional STEMI Criteria

A 76-year-old man presents to the emergency department with shortness of breath, severe weakness, diaphoresis, and confusion. The following ECG is obtained on arrival:

ECG STAT April 20, 2025

Precordial Swirl: OMI Pattern

Key Points Definition: The precordial swirl sign refers to a rotational pattern of ST-segment abnormalities across the precordial leads, suggesting a dynamic and evolving occlusion myocardial infarction (OMI). It is…

ECG STAT January 17, 2025

Subtle ST Segment Elevation: OMI Pattern

Key Points: ACS Dynamics: Occluded arteries in ACS can spontaneously reperfuse and reocclude, making ECG findings variable. Limitations of Computer Interpretation: Subtle STE is often missed by computerized ECG interpretation;…

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