EKG

Sgarbossa Criteria (STEMI in presence of LBBB)

1. ST elevation ≥ 1 mm concordant with QRS complex (most predictive of AMI of the 3 criteria)

2. ST depression ≥ 1 mm in lead V1, V2, or V3

3. ST elevation ≥ 5 mm where discordant with QRS complex

Modified 3rd rule: ST elevation ≥ 0.25 x S-wave (Ann Emerg Med. 2012 Dec;60(6):766-76)

SVT vs VT

Left Ventricular Hypertrophy

The Sokolow-Lyon index:

The Cornell voltage criteria:

Romhilt-Estes point score system ("diagnostic" >5 points; "probable" 4 points):

Other voltage-based criteria for LVH include:

Echo: normal LV myocardial thickness (end-diastole) 0.6-1.1cm