Non-invasive evaluation of opening and closing timings of the cardiac valves in the fetal cardiac cycle

A. H. Khandoker, Yoshitaka Kimura, Takuya Ito, Naoaki Sato, K. Okamura, M. Palaniswami

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

In this study, we propose a non-invasive system to recognize the timings of fetal cardiac events on the basis of analysis of fetal ECG and Doppler ultrasound signal together. Fetal ECG was extracted from transabdominal ECG (10 normal subjects, 38-41 weeks of gestation) using blind source separation with the reference signal. Multiresolution wavelet analysis enabled the frequency contents of the Doppler signals to be linked to the opening(o) and closing(c) of the heart's valves (Aortic (A) and mitral(M)). M-mode, B-mode and pulsed Doppler ultrasound were used to examine and verify the timings of opening and closure of aortic as well as mitral valves. The time intervals from Q-wave of QRS complex of fetal ECG to opening and closing of aortic valve, i.e. Q-Ao and Q-Ac were found to be 75.0±11.9 (msec) and 221.6±29.0 (msec) respectively. As for the mitral valve, Q-Mc and Q-Mo were found to be 45.0±18.9 (msec) and 301.6±20.7 (msec) respectively.

本文言語English
ホスト出版物のタイトルComputers in Cardiology 2008, CAR
ページ1061-1064
ページ数4
DOI
出版ステータスPublished - 2008 12 1
イベントComputers in Cardiology 2008, CAR - Bologna, Italy
継続期間: 2008 9 142008 9 17

出版物シリーズ

名前Computers in Cardiology
35
ISSN(印刷版)0276-6574

Other

OtherComputers in Cardiology 2008, CAR
国/地域Italy
CityBologna
Period08/9/1408/9/17

ASJC Scopus subject areas

  • コンピュータ サイエンスの応用
  • 循環器および心血管医学

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