| Characterization of QT and RR interval series during acute myocardial ischemia by means of recurrence quantification analysis. | |
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MedLine Citation:
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PMID: 20725861 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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This study is aimed to investigate the nonlinear dynamic properties of the fluctuations in ventricular repolarization, heart rate and their correlation during acute myocardial ischemia. From 13 ECG records in long-term ST-T database, 170 ischemic episodes were selected with the duration of 34 s to 23 min 18 s, and two 5-min episodes immediately before and after each ischemic episode as non-ischemic ones for comparison. QT interval (QTI) and RR interval (RRI) were extracted and the ectopic beats were removed. Recurrence quantification analysis (RQA) was performed on QTI and RRI series, respectively, and cross recurrence quantification analysis (CRQA) on paired normalized QTI and RRI series. Wilcoxon signed-rank test was used for statistical analysis. Results revealed that the RQA indexes for QTI and HRI series had the same changing trend during ischemia with more significantly changed indexes in QTI series. In the CRQA, indexes related to the vertical and horizontal structures in recurrence plot significantly increased, representing decreased dependency of QTI on RRI. Both QTI and RRI series showed reduced complexity during ischemia with higher sensitivity in ventricular repolarization. The weakened coupling between QTI and RRI suggests the decreased influence of sinoatrial node on QTI modulation during ischemia. |
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Authors:
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Yi Peng; Zhongwei Sun |
Publication Detail:
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Type: Journal Article Date: 2010-08-20 |
Journal Detail:
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Title: Medical & biological engineering & computing Volume: 49 ISSN: 1741-0444 ISO Abbreviation: Med Biol Eng Comput Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-01-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7704869 Medline TA: Med Biol Eng Comput Country: United States |
Other Details:
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Languages: eng Pagination: 25-31 Citation Subset: IM |
Affiliation:
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Department of Biomedical Engineering, Institute of Basic Medical Sciences, School of Basic Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China, pengyi@pumc.edu.cn. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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