Calculation used to distinguish early repolarization from subtle anterior MI.

Excluded EKG findings:

 

 

Using score of 23.4 as cutoff: Sensitivity 86%, Specificity 91%, Positive LR 9.2, Negative LR 0.1.

Using score of 22 as cutoff: Sensitivity 96%, Specificity 81%.

This formula has not been prospectively or externally validated.

Formula = (1.196*STE) + (0.059*QTc) - (0.326*R wave)

 

Smith SW et al. Electrocardiographic Differentiation of Early Repolarization From Subtle Anterior ST-Segment Elevation Myocardial Infarction. Ann Emerg Med. 2012; 60(1): 45-56.