Approach to ECGs - Syncope Syndromes Electrolytes • ↑K - brady, peak T, wide QRS, no P, sine wave, "the great imitator" • ↓ K - ST dep, T inv, U wave, long P • ↑ Ca - short QT, Osborn J (see below) • ↓ Ca - long QT via long ST • ↑ Mg - assoc with 1K, AV block • ↓ Mg - long QT, assoc withlK Brugada 1 - Coved STE >2mm in >1 of V1-V3 + negative T WPW - delta wave and short PR HOCM- dagger Q lat>inf leads, LVH, LAE, giant T inversion precordial ARVD - epsilon wave, T wave inversion, QRS widening/prolonged S wave V1-V3 Trifascicular block - RBBB, LAFB/LPFB (see below), 1st degree heart block Long QT (>480-500ms) Short QT (<360ms) PE: RBBB, S1Q3T3, tall R in V1, RAE, RV strain (neg TV 1-V4) - Dr. Michael Wong @mchlwng #Syncope #Syndromes #ECG #EKG #Checklist #diagnosis #cardiology #electrocardiogram #differential
