20.07.2010 · Introduction. Accessory atrioventricular pathway ablation has become a common occurrence in the field of electrophysiology. Septal accessory pathways APs are, however, known to be difficult to ablate as compared to those in other locations [].Because of the difficulty, it becomes clinically relevant for the practicing electrophysiologist to understand the anatomy, development, and. The delta wave in Lead II is a small notch. A short PR interval is also seen. The accessory pathway can, along with the normal pathway through the AV node, form a circle or circuit, making the heart vulnerable to re-entrant tachycardia. This ECG is from a four-year-old girl who had not been previously diagnosed. Type A – tall R in V1, LAD left posterior septal path Type B – deep S in V1, LAD right lateral or postero-septal path Type C – tall R in V1, inferior axis – 90º left lateral path Symptomatic ECG. AV re-entrant tachycardia or AF. Some ECG algorithms have been published predicting locations of left-sided or right-sided accessory pathway by positive of negative delta wave [1-3,9]. A study showed that diagnosis of left or right-side accessory pathway by other ECG parameters such as D’.

Background: Left lateral accessory pathway AP location along the mitral annulus MA can influence ablation strategy, including choice of a transseptal or retrograde aortic approach and the use of deflectable sheaths and/or bidirectional catheters.We aimed to develop electrocardiographic ECG criteria to accurately localize a left lateral AP, hypothesizing that the relationship of QRS. 04.05.2018 · Look carefully at relationship of signal of accessory pathway in ablation catheter and unipolar catheter. Skip navigation Sign in. Search. Loading. Close. This video is unavailable.