| Continuous glucose monitoring reveals associations of glucose levels with QT interval length. | |
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MedLine Citation:
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PMID: 20210566 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: QTc interval lengthening during hypoglycemia is discussed as a mechanism linked to sudden death in diabetes patients and the so-called "dead in bed syndrome." Previous research reported a high interindividual variability in the glucose-QTc association. The present study aimed at deriving parameters for direction and strength of the glucose-QTc association on the patient level using combined Holter electrocardiogram (ECG) and continuous glucose monitoring. METHODS: Twenty type 1 diabetes patients were studied: mean (SD, range) age, 43.6 (10.8, 22-65) years; gender male (n [%]), 10 (50.0%); mean (SD) hemoglobin A1C, 8.5% (1.0%); and impaired hypoglycemia awareness (n [%]), six (30.0%). Continuous interstitial glucose monitoring and Holter ECG monitoring were performed for 48 h. Hierarchical (mixed) regression modeling was used to account for the structure of the data. RESULTS: Glucose levels during nighttime were negatively associated with QTc interval length if the data structure was accounted for (b [SE] = -0.76 [0.17], P = 0.000). Exploratory regression analysis revealed hypoglycemia awareness as the only predictor of the individual strength of the glucose-QTc association, with the impaired awareness group showing less evidence for an association of low glucose with QTc lengthening. CONCLUSIONS: Mixed regression allows for deriving parameters for the glucose-QTc association on the patient level. Consistent with previous studies, we found a large interindividual variability in the glucose-QTc association. The finding on impaired hypoglycemia awareness patients has to be interpreted with caution but provides some support for the role of sympathetic activation for the QTc-glucose link. |
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Authors:
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T Kubiak; A Wittig; C Koll; B Mraz; J Gustav; U Herrmann; H Weber; W Kerner |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Diabetes technology & therapeutics Volume: 12 ISSN: 1557-8593 ISO Abbreviation: Diabetes Technol. Ther. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-09 Completed Date: 2010-06-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100889084 Medline TA: Diabetes Technol Ther Country: United States |
Other Details:
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Languages: eng Pagination: 283-6 Citation Subset: IM |
Affiliation:
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Institute of Psychology, University of Greifswald, Franz-Mehring-Strasse 47, Greifswald, Germany. kubiak@uni-greifswald.de |
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Blood Glucose* Diabetes Mellitus, Type 1 / blood*, physiopathology* Electrocardiography, Ambulatory Female Heart / physiopathology* Humans Male Middle Aged Regression Analysis Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Blood Glucose |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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