A successful RFCA procedure was defined as achieving successful endpoints of ablation; loss of pre-excitation in cases of accessory pathways
or non-inducibility of tachycardia at the end of ablation.
In some cases, Accessory pathway
is ablated prior to valve surgery.
This ECG showed fusion of anter-grade conduction from both the left sided accessory pathway
(AP) and AV node (Figure 4).
Catheter ablation performed at the University of Oklahoma Health Sciences Centre in patients with accessory pathways
, the success frequency was 98.8%.14 In a study by Calkin et al a total of 1136 ablation procedures were performed with success frequency of 95%.13 Complication rate was very low in our study, it was only 2%.
Keywords: Arrhythmias, Accessory pathways
A wide QRS can also be due to aberrancy, medication effect, pre-existing conduction abnormalities, an antegrade conducting accessory pathway
or a paced rhythm with tracking of a supraventricular arrhythmia.
In an editorial, Eckardt, (2002), referring to this study, discussed mapping of the CS to seek out evidence of intrinsic automaticity, which he believes is related to an accessory pathway
such as the bundle of the ligament of Marshall.
(b) AVNRT, AV nodal reentry tachycardia; AP, accessory pathway
; AFI, atrial flutter; AF, atrial fibrillation; VT, ventricular tachycardia.
Objective: To evaluate and compare the accuracy of two ECG algorithms in predicting accessory pathway
location by comparing the final accessory pathway
location after radiofrequency catheter ablation.
AVJRT can be due to atrioventricular nodal re-entrant tachycardia (AVNRT), where the antegrade limb is the slow pathway of the atrioventricular (AV) node and the retrograde limb the fast pathway, or atrioventricular re-entrant tachycardia (AVRT), where the antegrade limb is the AV node and the retrograde limb is the accessory pathway
(2002) found myocardial sleeves or cords that could serve as a connection between the ventricle and the CS myocardial coat forming a Coronary Sinus Accessory Pathway
Based on the presumable location of the left accessory pathway
from the electrocardiogram and presence of the LV thrombus, emergent catheter ablation was not considered.