STEMI Equivalents & High-Risk Patterns

ECG patterns representing acute coronary occlusion that require emergent cath lab activation even without classic STEMI mm criteria: De Winter sign, Wellens syndrome, posterior MI, hyperacute T waves, Sgarbossa criteria.

CRITICALSTEMI & ACS

When to use this protocol

Chest painAcute MILAD occlusionSTEMI equivalentCath lab activation

These patterns require IMMEDIATE cath lab activation. Even without traditional STEMI mm criteria, these ECG patterns represent acute coronary occlusion requiring emergent intervention.

Last reviewed: February 19, 2026by SymptomDx Medical Team

STEMI Equivalents & High-Risk Patterns

Overview

STEMI Equivalents Overview

Sgarbossa Criteria (LBBB or Paced Rhythms)

Wellens’ Syndrome — Detail

Teaching Points

References

STEMI Equivalents & High-Risk Patterns

Overview

STEMI Equivalents Overview

Sgarbossa Criteria (LBBB or Paced Rhythms)

Wellens’ Syndrome — Detail

Teaching Points

References