期刊
JOURNAL OF ELECTROCARDIOLOGY
卷 43, 期 4, 页码 302-309出版社
CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS
DOI: 10.1016/j.jelectrocard.2010.03.010
关键词
Vectorcardiography; Spatial ventricular gradient; 3-Dimensional ECG; Lead reconstruction
资金
- National Space Biomedical Research Institute
- NASA/Wyle Laboratories medical student internship programs
- NASA Technology Investment Funds
Introduction: Our primary objective was to ascertain which commonly used 12-to-Frank-lead transformation yields spatial QRS-T angle values closest to those obtained from simultaneously collected true Frank-lead recordings. Materials and Methods: Simultaneous 12-lead and Frank XYZ-lead recordings were analyzed for 100 postmyocardial infarction patients and 50 controls. Relative agreement, with true Frank-lead results, of 12-to-Frank-lead-transformed results for the spatial QRS-T angle using Kors' regression versus inverse Dower was assessed via analysis of variance, Lin's concordance, and Bland-Altman plots. Results: Spatial QRS-T angles from the true Frank leads were not significantly different than those derived from the Kors' regression-related transformation but were significantly smaller than those derived from the inverse Dower-related transformation (P < .001). Independent of method, spatial mean QRS-T angles were also always significantly larger than spatial maximum (peaks) QRS-T angles. Discussion: Spatial QRS-T angles are best approximated by regression-related transforms. Spatial mean and spatial peaks QRS-T angles should not be used interchangeably. Published by Elsevier Inc.
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