The efficacy of individual computer heart rate indices in detecting acidemia at birth in growth-restricted fetuses

Edwin R. Guzman, Anthony M. Vintzileos, Maria Martins, Carlos Benito, Christopher Houlihan, Maryellen Hanley

Research output: Contribution to journalArticle

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Abstract

Objective: To determine the efficacy of individual fetal heart rate (FHR) indices, as determined by computer analysis of the FHR tracing, in detecting fetal acidemia at birth in growth-restricted fetuses. Methods: The study population consisted of 38 growth-restricted fetuses at 26-37 weeks' gestation from pregnancies with abnormal uterine and/or umbilical artery Doppler velocimetry. The 1-hour FHR tracing was analyzed by computer within 4 hours of cesarean birth before the onset of labor. Umbilical artery cord blood was collected at birth, and pH was determined within 5 minutes of collection. Results: On linear regression, the duration of episodes of low variation in minutes (r = -0.77, r2 = 0.59) and short-term (r = 0.72, r2 = 0.52) and long-term (r = 0.69, r2 = 0.47) variation in milliseconds were significantly related to umbilical artery pH at birth, and more so than the number of accelerations of ten (r = 0.57, r2 = 0.32) and 15 (r = 0.38, r2 = 0.14) beats per minute. There were significant differences in computer measurements of FHR accelerations and variation between the umbilical artery pH categories of acidemia (pH less than 7.20), preacidemia (7.20-7.25), and nonacidemia (greater than 7.25). Stepwise regression revealed that episodes of low variation best described the model for predicting umbilical artery pH at birth (P < .001), with no improvement provided by the addition of other computer-analyzed FHR characteristics. Conclusion: In this population of growth-restricted fetuses delivered by elective cesarean, the computer indices of duration of episodes of low variation and short-term and long- term variation were significantly associated with umbilical artery pH and predicted umbilical artery acidemia at birth.

Original languageEnglish (US)
Pages (from-to)969-974
Number of pages6
JournalObstetrics and Gynecology
Volume87
Issue number6
DOIs
StatePublished - Jan 1 1996

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Umbilical Arteries
Fetal Heart Rate
Fetus
Heart Rate
Parturition
Growth
Labor Onset
Uterine Artery
Pregnancy
Rheology
Population Growth
Fetal Blood
Linear Models
Population

All Science Journal Classification (ASJC) codes

  • Obstetrics and Gynecology

Cite this

Guzman, Edwin R. ; Vintzileos, Anthony M. ; Martins, Maria ; Benito, Carlos ; Houlihan, Christopher ; Hanley, Maryellen. / The efficacy of individual computer heart rate indices in detecting acidemia at birth in growth-restricted fetuses. In: Obstetrics and Gynecology. 1996 ; Vol. 87, No. 6. pp. 969-974.
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The efficacy of individual computer heart rate indices in detecting acidemia at birth in growth-restricted fetuses. / Guzman, Edwin R.; Vintzileos, Anthony M.; Martins, Maria; Benito, Carlos; Houlihan, Christopher; Hanley, Maryellen.

In: Obstetrics and Gynecology, Vol. 87, No. 6, 01.01.1996, p. 969-974.

Research output: Contribution to journalArticle

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AU - Vintzileos, Anthony M.

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