PMC4322402_01
PMC4322402_02
Narrow complex tachycardia with left bundle branch block
APC-8-50-g001.jpg
PMC4322402_02_APC-8-50-g001.jpg
F1
An initial diagnosis of SVT with left bundle branch block was made [Figure 1].
Normal sinus rhythm following treatment.. ECMO: Extracorporeal membrane oxygenation, IV: Intravenous, PALS: Pediatric advanced life support, SVT: Supraventricular tachycardia
APC-8-50-g002.jpg
PMC4322402_02_APC-8-50-g002.jpg
F2
The presence of P waves suggested that it was likely due to a concealed accessory pathway [Figure 2].