Journal of Medical Systems

, Volume 10, Issue 4, pp 307–320 | Cite as

A detecting method for the fetal QRS complex with a small amplitude

  • Fumihiko Yano
  • Satoki P. Ninomija


It is often impossible to determine the presence of the fetal QRS waves from leads on the maternal abdomen because the amplitude is small or noise interferes. Yet, clinically, confirmation is highly necessary. Clinicians face a great difficulty when the fetal QRS waves are not identifiable: when, for example, they are not apparent owing either to the fetal death or to the poor recording system. We therefore developed the fetal QRS complex detecting system for computer use. This system was developed through the use of two procedures. First, possible fetal QRS waves were detected by computing slopes of moving regression lines. Second, the location of the fetal QRS waves was determined from possible fetal QRS waves by using the weighted periodgram method. We recognized that this system can detect fetal QRS complex from fetal ECGs that are affected by mixture noises in the fetal ECGs accompanying both cephalic and breech presentations.


Regression Line Small Amplitude Great Difficulty Recording System Fetal Death 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • Fumihiko Yano
    • 1
  • Satoki P. Ninomija
    • 1
  1. 1.From the College of Science and EngineeringAoyama Gakuin UniversityTokyoJapan

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