Case report: orthodromic atrioventricular re-entrant tachycardia with left lateral accessory pathway—smart diagnosis with a smart device

Aberrant ventricular conduction due to functional bundle branch block is an important finding during SVT. In the presented case, a wearable smart device was able to document two episodes of tachycardia with two distinct ECG morphologies, one with broad QRS complexes at a slower heart rate and the other with a faster episode of narrow QRS complexes. Therefore, the wearable device was not only able to document an episode of symptomatic tachycardia, but it also additionally offered important keys to the correct diagnosis.