Dispersion of QT and QTc interval in healthy children, and effects of sinus arrhythmia on QT dispersion
| Autor: | Semra Atalay, Ocal B, Tutar He, Ayten Imamoglu |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Male
medicine.medical_specialty Adolescent Heart disease Normal values QT interval Electrocardiography Sex Factors Heart Rate Reference Values Internal medicine Heart rate medicine Humans Arrhythmia Sinus cardiovascular diseases Child medicine.diagnostic_test business.industry Significant difference Heart University hospital medicine.disease Qt dispersion Anesthesia Papers cardiovascular system Cardiology Female Cardiology and Cardiovascular Medicine business circulatory and respiratory physiology |
| Zdroj: | Heart. 80:77-79 |
| ISSN: | 1355-6037 |
| DOI: | 10.1136/hrt.80.1.77 |
| Popis: | Objective—To determine the normal values of QT and QTc dispersion and the effects of sinus arrhythmia on QT dispersion in healthy children. Patients and setting—The study was carried out in a university hospital on 372 local schoolchildren (200 male, 172 female), aged seven to 18 years. Methods—The QT and preceding RR intervals of at least one sinus beat were measured manually in a range of nine to 12 leads on standard 12 lead surface ECGs. The corrected QT interval was computed by the method of Bazett. Dispersion of QT and QTc were defined as (1) the difference between the maximum and minimum QT and QTc intervals occurring in any of the 12 leads (QTD and QTcD), (2) the standard deviation of the QT and QTc interval in the measurable leads (QT-SD and QTc-SD). Results—There was no significant difference in QT, QTc, and RR dispersion between girls and boys. Overall 53% of children had sinus arrhythmia. Although QTD and QT-SD were not affected by sinus arrhythmia, both QTcD and QTc-SD were significantly greater in children with sinus arrhythmia than in those without (QTcD: 52.9 (17.4) v 40.9 (13.1); QTc-SD: 17.5 (5.9) v 13.2 (4.0); p |
| Databáze: | OpenAIRE |
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