Cited by 34Prenatal Substance Exposure EffectsSmoking Behavior and CessationHeart Rate Variability and Autonomic Control

The effect of cigarette smoking on fetal heart rate characteristics*1

ONCKEN, C·2002·Obstetrics & Gynecology

Abstract

OBJECTIVE: To evaluate the effect of repeated cigarette smoking on fetal heart rate (FHR) characteristics. METHODS: Fifteen chronic smokers who were between 28 and 36 weeks' gestation were evaluated during an 8-hour smoking session. Baseline FHR and reactivity were evaluated before an initial cigarette and 4 hours later (after the fourth cigarette), when the effects of smoking on FHR were expected to be maximal. Plasma nicotine was measured at baseline and repeated at times of fetal monitoring. RESULTS: Subjects smoked a mean +/- standard deviation of 22 +/- 6 cigarettes per day. They abstained from smoking for 9.2 +/- 3.2 hours before evaluation. The initial baseline FHR was 134 +/- 9 beats per minute versus 135 +/- 11 beats per minute after the fourth cigarette (P =.17). Plasma nicotine increased from 2.6 +/- 5.6 ng/mL to 24 +/- 9.9 ng/mL after the fourth cigarette (P <.001). The initial nonstress test was reactive in 12 of 15 (80%) of the fetuses. After the fourth cigarette, only four of 15 (27%) of the nonstress tests were reactive. A majority of tracings (eight of 15) were initially reactive before smoking and became nonreactive after smoking. Some tracings remained nonreactive (three of 15), and some tracings remained reactive (four of 15) at both assessments. None of the tracings that were initially nonreactive became reactive. The change in reactivity was significant (P =.013). CONCLUSION: Acute, repeated smoking decreases FHR reactivity.

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  • Fetuses of smokers show more maladaptive responses to the non-stress test, lower heart rate variability, more mouth and self-touch movements, and poorer recognition of maternal voice than fetuses of nonsmokers.

    “found greater rates of maladaptive response to the non-stress test (a clinical index of fetal well-being)(96), including reduced heart rate variability, increased mouth and self-touch movements, and impaired recognition of maternal voice in fetuses of smokers compared with those of nonsmokers.”

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Authors
ONCKEN, C.
Affiliations
University of Connecticut (US)
Corresponding author
ONCKEN, C
Venue
Obstetrics & Gynecology
Published
2002-05
Volume
99
Issue
5
Pages
751-755
ISSN
0029-7844 (ISSN-L)
OpenAlex
W2075093007
Cited by
34
References
24
Citations by year
2023: 1 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 5 · 2015: 2 · 2014: 2 · 2013: 1 · 2012: 1
FWCI
2.42
Type
journal article
Language
en
Open access
closed
Locations
  • Obstetrics and Gynecology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1k02aa000239-01)
  • National Institute on Alcohol Abuse and Alcoholism (K02-AA00239)
  • National Center for Research Resources (M01RR006192, M01 RR 06192)
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Substance Exposure Effects
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
Keywords
cigarette smoking, fetal heart rate, fetal heart rate reactivity, nonstress test, plasma nicotine, chronic smokers, pregnancy, fetal monitoring
MeSH terms
Female, Fetal Monitoring, Gestational Age, Heart Rate, Fetal, Humans, Nicotine, Pregnancy, Prospective Studies, Smoking

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