Abstract
The observation of a left sided accessory pathway with decremental properties is rare. We describe the behaviour of one of these pathways which was characterized by the presence of retrograde conduction (not previously reported) and thus inducibility of atrio-ventricular orthodromic reentrant tachycardia.
Highlights
A 52 year-old male was admitted to our cardiology department complaining recurrent episodes of palpitation
We describe the behaviour of one of these pathways which was characterized by the presence of retrograde conduction and inducibility of atrio-ventricular orthodromic reentrant tachycardia
During programmed right atrial stimulation, antegrade long conduction times were detected, along with a progressive leghtening of the A-H interval, a contemporary shortening of the H-V interval and a progressive pre-excitation of QRS complexes with right bundle branch block (RBBB) morphology (Figures 1(a)-(b))
Summary
The observation of a left sided accessory pathway with decremental properties is rare. We describe the behaviour of one of these pathways which was characterized by the presence of retrograde conduction (not previously reported) and inducibility of atrio-ventricular orthodromic reentrant tachycardia.
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