Exercise stress testing revealed irregular wide complex tachycardia with right bundle branch morphology, raising concerns for either atrial fibrillation or left ventricular tachycardia.
The differential diagnosis of exercise-induced irregular wide complex tachycardia with RBBB morphology includes AF with aberrancy/pre-excitation and specific left ventricular tachycardias.
Tasa de eventos absoluta: 0% vs 0%
A 29-year-old active woman was referred for evaluation following the development of an irregular wide complex tachycardia with right bundle branch morphology and extreme QRS axis during exercise stress testing. Two main alternative diagnoses are discussed: a) atrial fibrillation with either aberrancy or pre-excitation; b) left ventricular tachycardia originating from the Purkinje system including left posterior fascicle versus posteromedial papillary muscle.
Kalfon et al. (Sun,) reported a other. Exercise stress testing revealed irregular wide complex tachycardia with right bundle branch morphology, raising concerns for either atrial fibrillation or left ventricular tachycardia.