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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationComputers in Cardiology 2008, CAR
Pages1061-1064
Number of pages4
DOIs
Publication statusPublished - 2008 Dec 1
EventComputers in Cardiology 2008, CAR - Bologna, Italy
Duration: 2008 Sep 142008 Sep 17

Publication series

NameComputers in Cardiology
Volume35
ISSN (Print)0276-6574

Other

OtherComputers in Cardiology 2008, CAR
CountryItaly
CityBologna
Period08/9/1408/9/17

ASJC Scopus subject areas

  • Computer Science Applications
  • Cardiology and Cardiovascular Medicine

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