Michał Orczykowski, Paweł Derejko, Ewa Szufladowicz, Robert Bodalski, Łukasz Szumowski, Piotr Urbanek, Roman Kepski, Agnieszka Maryniak, Franciszek Walczak
We present a case of a 15-year old girl in whom supraventricular tachycardia (SVT) with rSr' pattern in lead V1 and the QRS width of less than 110 ms, suggesting typical slow-fast AVNRT, was the presenting arrhythmia. During sinus rhythm no preexcitation was observed. Considerable variability of the tachycardia cycle length (240-370 ms), attributable to the presence of the fast and slow nodal pathways, was also observed. However, during the electrophysiological study only orthodromic atrio-ventricular reciprocating tachycardia with the left-sided superior accessory pathway as the retrograde limb was documented...
October 2005: Kardiologia Polska