Automatic QRS Selvester scoring system in patients with left bundle branch block.

Published

Journal Article

The Selvester QRS scoring system uses quantitative criteria from the standard 12-lead electrocardiogram (ECG) to estimate the myocardial scar size of patients, including those with left bundle branch block (LBBB). Automation of the scoring system could facilitate the clinical use of this technique which requires a set of multiple QRS patterns to be identified and measured.We developed a series of algorithms to automatically detect and measure the QRS parameters required for Selvester scoring. The 'QUantitative and Automatic REport of Selvester Score' was designed specifically for the analysis of ECGs from patients meeting new strict criteria for complete LBBB. The algorithms were designed using a training (n = 36) and a validation (n = 180) set of ECGs, consisting of signal-averaged 12-lead ECGs (1000 Hz sampling) recorded from 216 LBBB patients from the MADIT-CRT. We assessed the performance of the methods using expert manually adjudicated ECGs. The average of absolute differences between automatic and adjudicated Selvester scoring was 1.2 ± 1.5 points. The range of average differences for continuous measurements of wave locations and interval durations varied between 0 and 6 ms. Erroneous detection of Q, R, S, R', and S' waves (oversensed or missed) were 3, 1, 1, 16, and 6%, respectively. Seven percent of notches detected in the first 40 ms were misdetected.We propose an efficient computerized method for the automatic measurement of the Selvester score in patients with the strict LBBB.

Full Text

Cited Authors

  • Xia, X; Wieslander, B; Strauss, DG; Wagner, GS; Zareba, W; Moss, AJ; Couderc, J-P

Published Date

  • February 2016

Published In

Volume / Issue

  • 18 / 2

Start / End Page

  • 308 - 314

PubMed ID

  • 25805156

Pubmed Central ID

  • 25805156

Electronic International Standard Serial Number (EISSN)

  • 1532-2092

International Standard Serial Number (ISSN)

  • 1099-5129

Digital Object Identifier (DOI)

  • 10.1093/europace/euv040

Language

  • eng