Open AccessCARDIOTOCOGRAPHIC DISTORTION OF FETAL HEART RATE VARIABILITY
Author(s) -
Sigurd JÖRgen,
Löfgren Olof,
Joelsson Ingemar
Publication year - 1985
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016348509155124
Subject(s) - medicine , fetal heart , distortion (music) , fetal heart rate , heart rate , cardiology , amplitude , oscillation (cell signaling) , range (aeronautics) , fetus , pregnancy , telecommunications , optics , blood pressure , physics , computer science , amplifier , genetics , materials science , bandwidth (computing) , composite material , biology
Abstract. The error arising when evaluating FHR variability on CTG curves is demonstrated. Visual estimation is based on the appreciation of oscillation amplitude (O.A.) which is necessarily dependent on basic heart frequency and the changes therein. It reflects variability in a distorted way – the distortion can be as great as 33% even when the basic heart frequency remains within the normal range of 120‐ 160 beats per minute.