Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)
- Volume 1997 Issue 11
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- Pages.451-454
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- 1997
A Quantitative Analysis of Nonlinearity Changes of 24 hour Heart Rate Variability of TOF Children Group and Normal Children Group
TOF 소아 집단과 정상 소아 집단의 24 시간 심박동수 변동량의 비선형성 변화에 대한 정량적 분석
- Lee, J.M. (Interdisciplinary Program in Medical and Biological Engineering Major, Seoul Natl Univ.) ;
- Noh, J.I. (Dept. of Pediatrics, Seoul National University) ;
- Park, K.S. (Dept. of Biomedical Engineering, Seoul National University)
- Published : 1997.11.28
Abstract
It has been reported that sudden cardiac death and ventricular tachycardia occur after treatment of tetralogy of fallot(TOF). It is regarded that ventricular arrythmia is the main source or the sudden cardiac death, but it is not verified. It is likely that TOF has effect on the heart rate variability because of the ventricular arrythmia. We study how complex and periodic heart rate dynamics change in the normal children (n=13) and TOF children (n=13) throughout 24 hours. We recorded 24-hour holter ECG, and segmented each ECG data into 1 hour length. We analyze each HR time series, and quantify the overall complexity of each HR time series by its correlation dimension. We also calculate the power spectrum of HR, and obtain low-frequency component (0.03-0.15Hz) and high-frequency component (0.15-0.4Hz). We compare the results between normal and TOF groups throughout 24 hours. TOF group have lower correlation dimension (
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