II. Definitions
- Fetal Tachycardia
- Fetal Heart Rate >160 bpm for >=10 minutes
III. Causes: Mild Fetal Tachycardia (FHR 160-180 bpm)
- Usually benign if normal FHR Variability or accelerations (spontaneous or stimulated)
- Maternal Causes
- Maternal Fever or infection
- Maternal dehydration
- Maternal anxiety
- Maternal Ketosis
- Maternal Thyrotoxicosis
- Maternal Anemia
- Medications
- Anticholinergic Medications (e.g. Benadryl)
- Sympathomimetic medications (e.g. Terbutaline)
- Stimulants
- Fetal Causes
- Fetal Anemia
- Prolonged fetal movement
- Severely Preterm Fetus
- Cardiac anomalies
- Chronic Fetal Hypoxia
IV. Causes: Significant Fetal Tachycardia (FHR >180 bpm)
- Chorioamnionitis (especially if Maternal Fever)
- Fetal Arrhythmia or congenital defect (FHR >200 bpm)
V. References
- Bailey (2000) ALSO, E:1-13
- Gabbe (2002) Obstetrics, p. 395
- Arnold (2020) Am Fam Physician 102(3): 158-67 [PubMed]
- Rylander (2001) Clin Fam Pract 3(2):287-305 [PubMed]
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Related Studies
Definition (NCI) | A fetal heart rate above 160 bpm that is sustained for longer than 10 minutes.(NICHD) |
Concepts | Sign or Symptom (T184) |
SnomedCT | 199590007, 240298005 |
Italian | Tachicardia fetale |
Dutch | foetale tachycardie, tachycardiie, foetaal, tachycardie foetaal |
German | fetale Tachykardie, Tachykardie fetal |
Japanese | 胎児頻脈, タイジヒンミャク |
English | fetal tachycardia (diagnosis), fetal tachycardia, Tachycardia fetal, Foetal tachycardia, Tachycardia foetal, Fetal Tachycardia, Baseline Fetal Tachycardia, Fetal tachycardia, Fetal tachycardia (disorder) |
Czech | Tachykardie u plodu, Fetální tachykardie |
Hungarian | Tachycardia, foetalis, Magzati tachycardia, Foetalis tachycardia, Magzati szapora szívverés |
Spanish | taquicardia fetal (trastorno), taquicardia fetal, Taquicardia fetal |
Portuguese | Taquicardia fetal |
French | Tachycardie foetale |