Automatic J-point location in subjects with electrocardiographic early repolarization
Year: 2014
Type: conference-paper
Abstract: Early repolarization (ER) in the inferior/lateral leads of 12-lead ECG increases the risk of arrhythmic death. Automatic methods are needed to robustly locate the Jpoint in ER positive ECGs so large databases with electrocardiographic ER patterns can be analyzed.We developed an algorithm (Std-12) to determine Jpoint location in the 12-lead ECG based on the standard deviation across the 12 leads.The algorithm was compared to J-point locations determined manually by Minnesota coding of 12-lead ECGs with and without ER.Minnesota coded QRS durations were different in the ER+ and ER-groups.In contrast, the Std-12 algorithm measured similar QRS durations in the ER+ and ERgroups, consistent with the Minnesota coded duration of the ER-group.If the later Minnesota coded J-points were used instead of the earlier J-points otherwise recommended by the Minnesota coding scheme, the QRS durations in the ER-and ER+ groups were similar, and agreed with the Std-12 algorithm.The results of this study suggest that J-points should always be set after any notches or slurs, to help determine the correct QRS duration.The developed Std-12 algorithm seems to robustly determine correct QRS durations, regardless of the electrocardiographic presence of ER.
Institutions: Aalborg University, University of Copenhagen
Language: English
Topic: ECG Monitoring and Analysis
Subfield: Cardiology and Cardiovascular Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: green
Funder: Danmarks Frie Forskningsfond
OpenAlex ID: W2148415585