A Fast and Reliable Algorithm to Localize Accessory Pathways Based on the Polarity of the QRS Complex on the Surface ECG During Sinus Rhythm

Abstract

Analysis of the polarity of the QRS complex on five electrocardiographic leads provides an easy, fast and reliable way to localize accessory pathways during sinus rhythm.

Accuracy of the new electrocardiogram algorithm in predicting localization of accessory pathways in patients with typical Wolff-Parkinson-White syndrome

“…Almost studies do not distinguish between these two regions (LAL and LL region) [4,5,7,9,10]. The problem is that we were a need to predict the difference between the LAL and LL region.…”

“…Furthermore, difference between RAL/RL and RPL region by positive or negatie QRS complex was significantly higher; Therefore, the doctors had two methods in predicting between RL and RPL region before RCFA. Almost studies have not clearly defined between three regions of the right free wall, especially between the right lateral and posterolateral [4,5,7,9,10]. Muhammad studied many parameters and showed that the value of localizing in right side with Se of 92% and Sp of 100%; but right free wall pathways were only two locations (right antero and right posterolateral pathways) [10].…”

“…This "Qrs pattern" in at least 1/3 inferior lead (DII, DIII, aVF) was significantly higher with Se of 75% and Sp of 91.9% for a midsepta1 region ( Figure 5). D'avila was only studied on DIII lead [5].…”

“…However, some ECG algorithms had difficult parameters, some studies known that difficulty between other regions, and some algorithms were only focus on some locations [1,[3][4][5][6][7]; In fact, we were enrolled to build a new ECG algorithm propectively for the locate to APs. Therefore, the purpose of this study was to test the accuracy of our new ECG algorithm for APs localization before intervention.…”

Effect of Radiofrequency Catheter Ablation on Doppler Echocardiographic Parameters in Patients With Wolff-Parkinson-White Syndrome

“…Delta wave polarity or QRS polarity on a 12 lead ECG has been widely used to determine accessory pathway location. [1][2][3][4][5] Related to echocardiography, M-mode echocardiography, [6][7][8] phase analysis of echocardiographic images, 9,10) Doppler tissue imaging, 11,12) and Doppler myocardial imaging 13) have also been employed to detect the accessory pathway side. These methods have focused mainly on abnormal ventricular motion.…”