Independent ablation of retrograde and anterograde accessory connection conduction at the atrial and ventricular insertion sites: evidence supporting the impedance mismatch hypothesis for unidirectional block.


INTRODUCTION The impedance mismatch hypothesis has been proposed as one of the mechanisms responsible for accessory connection conduction block. METHODS AND RESULTS We describe a case in which retrograde conduction across a posteroseptal accessory connection was ablated at the atrial insertion site in the coronary sinus os, whereas anterograde conduction… (More)


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