Biomaterial Database

Fetal heart rate decelerations during a nonstress test. 1981

J P Phelan, and P E Lewis

In a review of 2000 nonstress tests (NSTs) on 972 pregnant women at high risk at the authors' institution, 94 exhibited fetal heart rate (FHR) decelerations in response to fetal activity in 110 (46.6%) of the 236 NSTs. The NST results were interpreted as either reactive (178) or nonreactive (58). Of those cases with an FHR deceleration pattern, an abnormal cord position was observed in 55.3% (X2 = 68; P less than .001). Of the 74 patients who went into labor, 59.5% demonstrated variable FHR decelerations. Moreover, 8.5% required cesarean section for fetal distress. Of greater importance, 3 intrauterine fetal deaths occurred that appeared to be related to the abnormal cord position. FHR decelerations may occur during reactive as well as nonreactive NSTs. When FHR decelerations are present, they may signify some form of abnormal cord position and require further evaluation by ultrasonography and a contraction stress test.

UI	MeSH Term	Description	Entries
D009068	Movement	The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.	Movements
D010922	Placenta Diseases	Pathological processes or abnormal functions of the PLACENTA.	Placenta Disorders,Placental Diseases,Disease, Placenta,Disease, Placental,Diseases, Placenta,Diseases, Placental,Disorder, Placenta,Disorders, Placenta,Placenta Disease,Placenta Disorder,Placental Disease
D010925	Placental Function Tests	Methods used for the assessment of placental function.	Fetoplacental Function Tests,Fetoplacental Function Test,Function Test, Fetoplacental,Function Test, Placental,Function Tests, Fetoplacental,Function Tests, Placental,Placental Function Test,Test, Fetoplacental Function,Test, Placental Function,Tests, Fetoplacental Function,Tests, Placental Function
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D005260	Female		Females
D005315	Fetal Diseases	Pathophysiological conditions of the FETUS in the UTERUS. Some fetal diseases may be treated with FETAL THERAPIES.	Embryopathies,Disease, Fetal,Diseases, Fetal,Embryopathy,Fetal Disease
D005318	Fetal Heart	The heart of the fetus of any viviparous animal. It refers to the heart in the postembryonic period and is differentiated from the embryonic heart (HEART/embryology) only on the basis of time.	Fetal Hearts,Heart, Fetal,Hearts, Fetal
D005333	Fetus	The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN.	Fetal Structures,Fetal Tissue,Fetuses,Mummified Fetus,Retained Fetus,Fetal Structure,Fetal Tissues,Fetus, Mummified,Fetus, Retained,Structure, Fetal,Structures, Fetal,Tissue, Fetal,Tissues, Fetal
D006339	Heart Rate	The number of times the HEART VENTRICLES contract per unit of time, usually per minute.	Cardiac Rate,Chronotropism, Cardiac,Heart Rate Control,Heartbeat,Pulse Rate,Cardiac Chronotropy,Cardiac Chronotropism,Cardiac Rates,Chronotropy, Cardiac,Control, Heart Rate,Heart Rates,Heartbeats,Pulse Rates,Rate Control, Heart,Rate, Cardiac,Rate, Heart,Rate, Pulse
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man