Modifications in arruda’s localization method in left ventricle analysis

Sándor Miklós Szilágyi, L. Szilágyi, L. K. Görög, Zs Máthé, Z. Benyó

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The Wolff-Parkinson-White (WPW) syndrome is characterized by an accessory pathway (by-pass tract) between the atria and ventricles, that conducts parallel with the atrioventricular (AV) node - His bundle, but faster. Usually the WPW analysis is focused to develop and validate an accessory pathway (AcP) localization method. In this paper we present a sensibility analysis of Arruda’s stepwise method, and a decomposition algorithm to improve the performance of AcP localization. Our main purpose is to detect more accurately the location of the ventricular insertion, because that can enlighten the necessary RF catheter ablation of cardiac tissue (shorter intervention due to correct localization of AcP), which is highly effective in the invasive treatment of WPW syndrome. We developed a modified Arruda localization method, which was tested and evaluated through our measurements. Although it has been statistically concluded, that the performance of the Arruda algorithm is about 90%, our study revealed that some modifications in this localization method could be beneficial. The Arruda method was tested on a total of 79 patients, and 91.1% correct localization performance was reached. With modifications in the left ventricle region, this performance reaches 94.9%. After a deeper analysis of each decision point of Arruda localization method, we considered that the lead aVF is not as relevant as other used leads (I, II, III, V1). Despite lower decision performance of aVF sign tests in the right and septal region, they cannot be wisely replaced within the scope of the 12 lead ECG. The modified algorithm significantly improves the localization performance in the left ventricle. Finally we can conclude the followings: (1) Arruda’s leads used for the detection of septal and right regions seem to give optimal solution in the scope of 12-lead ECG; (2) Significant improvements are achieved in the left ventricle; (3) A more accurate analysis requires further studies and a significantly larger database. A high localization performance of non-invasive methods is relevant because it leads to easier invasive interventions, and also reduces the discomfort caused to the patient.

Original languageEnglish
Title of host publicationIFMBE Proceedings
PublisherSpringer Verlag
Number of pages5
Publication statusPublished - 2007
Event10th World Congress on Medical Physics and Biomedical Engineering, WC 2006 - Seoul, Korea, Republic of
Duration: Aug 27 2006Sep 1 2006


Other10th World Congress on Medical Physics and Biomedical Engineering, WC 2006
CountryKorea, Republic of



  • Accessory pathway localization
  • Non-invasive method
  • WPW syndrome

ASJC Scopus subject areas

  • Biomedical Engineering
  • Bioengineering

Cite this

Szilágyi, S. M., Szilágyi, L., Görög, L. K., Máthé, Z., & Benyó, Z. (2007). Modifications in arruda’s localization method in left ventricle analysis. In IFMBE Proceedings (1 ed., Vol. 14, pp. 118-122). Springer Verlag.