VT versus SVT with Aberration - Interpretation Cheat Sheet Features favouring VT ● Absence of typical RBBB or LBBB morphology ● AV dissociation (P and QRS complexes occur independantly of each other) ● Presence of captured beats (normal sinus beat that is captured between a VT run) and fusion beats (hybrid complex of normal sinus beat and a ventricular beat colision) ● Positive or negative concordance in all precordial leads, i.e. leads V1-6 show entirely positive (R) or entirely negative (QS) complexes. Brugada algorithm 1. Positive or negative concordance 2. Onset of R to nadir (lowest point) of S > 100 ms in any V lead 3. AV dissociation 4. Morphology criteria: both V1,V6 suggest VT Usama Nasir MD @usamanasirmd - Visualmed #VT #VTach #VentricularTachycardia #SVT #Aberration #Aberrancy #Comparison #Diagnosis #Cardiology
