We have studied 135 patients with the pre-excitation syndrome and have demonstrated evidence of multiple accessory pathways in 20 patients. Five patients had two distinct accessory atrioventricular (A-V) connections, associated with enhanced A-V node conduction in one patient. Twelve patients had a single accessory A-V connection associated with enhanced A-V conduction. In one of these there wa...

BACKGROUND Manifest nodofascicular/ventricular (NFV) pathways are rare. METHODS AND RESULTS From 2008 to 2013, 4 cases were identified with manifest NFV pathways from 3 centers. The clinical findings and ablation sites are reported. All 4 cases presented with a wide complex tachycardia but with different QRS morphologies. Case 1 showed a left bundle branch block/superior axis, case 2 showed a...

We examined the electrophysiologic effects of verapamil in eight patients with the Wolff-Parkinson-White syndrome. Verapamil shortened the antegrade effective refractory period of the accessory pathway in three patients and abbreviated the shortest cycle length with 1:1 conduction over the accessory pathway in two patients. More significantly, verapamil decreased the shortest RR interval betwee...

Submit Manuscript | http://medcraveonline.com J Cardiol Curr Res 2015, 4(3): 00145 in right-sided pathways, we have previously demonstrated in the study of 55 patients with left-sided AP [12], that 7% of anterograde conduction and 15% of retrograde conduction had decremental conduction over the AP with a maximal decrement of ≥30 ms [12]. Nevertheless, we have found that an additional 27% of the...

The noninvasive localization of the accessory pa thway (AP) responsible for ventricular preexcitation is helpful in the initial evaluation of patients with Wolff-Parkinson-White (WPW) syndrome. Recently, two groups of authors independently published new classifications derived from the correlation of 12-lead ECG with electrophysiologic studies. ~'2 Although these classifications allow a more pr...

The effect of atrial pacing and recording site and ventricular pacing site on assessment of conduction over the accessory pathway (AP) was examined in a group of patients with the Wolff-Parkinson-White syndrome. The importance of initial localization of the AP by recording the sequence of retrograde atrial activation during circus movement tachycardia is demonstrated. Inability to record or pac...

In this retrospective study of 22 patients with the Wolff-Parkinson-White (WPW) syndrome, the cost of catheter ablation in 11 patients was compared with that of surgical ablation in another 11 patients. All patients in the catheter ablation group had a posteroseptal accessory pathway; in the surgical group, 5 patients had a left lateral accessory pathway, 3 had a left lateral and posteroseptal ...

A case of WPW Syndrome due to parahisian accessory pathway was ablated by the catheter inversion technique. The pathway could not be eliminated by direct femoral approach using repeated high radiofrequeny energy ablation. No pathway potential was seen in the aortic cusps. Instead, it was successfully ablated by curving the ablation catheter underneath the septal leaflet of the tricuspid valve t...

pathway and subtle preexcitation, the AH intervals were short. These data pertain to a predominantly adult population. Only 1 of the patients was <12 years old. This patient showed a minimal preexcitation pattern and the pathway was in the left lateral region. These data cannot be extrapolated to the pediatric population, in general, who may have relatively shorter atrioventricular nodal conduc...

Catheter ablation of Wolff-Parkinson-White syndrome is associated with up to 5% of failure. Coronary sinus (CS) abnormalities or connections between CS myocardial coat and left ventricular epicardium are associated with posteroseptal and left posterior accessory pathways (AP). A 41-year-old patient with WPW syndrome was referred to our hospital after three unsuccessful ablations. The 12-lead EC...