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The Significance of Sinusoidal Fetal Heart Rate Pattern During Labor and Its Relation to Fetal Status and Neonatal Outcome
Author(s) -
Ayromlooi Jahangir,
Berg Peter,
Tobias Mitchell
Publication year - 1979
Publication title -
international journal of gynecology and obstetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 97
eISSN - 1879-3479
pISSN - 0020-7292
DOI - 10.1002/j.1879-3479.1979.tb00460.x
Subject(s) - medicine , fetus , umbilical cord , apgar score , scalp , hypovolemia , hypervolemia , cord , anesthesia , cardiology , fetal distress , heart rate , fetal heart rate , umbilical artery , obstetrics , depression (economics) , pregnancy , surgery , blood volume , blood pressure , anatomy , genetics , macroeconomics , biology , economics
Twenty‐seven cases of sinusoidal fetal heart rate were studied. This group had a mean scalp pH of 7.288, significantly lower (p < 0.005) than that of the control group. The mean one‐minute Apgar score was 7.148, significantly lower (p < 0.001) than the control group's mean score. Almost half (48.15%) of the fetuses had a one‐minute Apgar score of 7 or less. Every fetus was viable. Amplitude of the pattern was found to correlate with neonatal depression, the larger the amplitude, the more profound the depression. Over 96% of the fetuses had cord‐related deceleration patterns, and nearly 63% had obvious cord complications. It is postulated that sinusoidal patterns are an umbilical cord‐related phenomenon, resulting from an alternating hypovolemia and hypervolemia. Clinicians are urged to scrutinize carefully any cases of this pattern, and perform an immediate fetal scalp blood pH determination. If the pH determination obtained is less than 7.25, the authors suggest intervention and operative delivery.