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fetal heart rate |
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fetal heart rate (FHR), the number of heartbeats in the fetus that occur in a given unit of time. The FHR varies in cycles of fetal rest and activity and is affected by many factors, including maternal fever, uterine contractions, maternal-fetal hypotension, and many drugs. The normal FHR is between 110 beats/min and 160 beats/min. In labor the FHR is monitored with a fetoscope, an electronic fetal monitor for detecting abnormal alterations in the heart rate, especially recurrent decelerations that continue past the end of uterine contractions. fetal heart rate Obstetrics A rate which, in the non-stressed fetus, reflects cardioaccelerator and cardiodecelerator reflexes; analysis of the FHR requires evaluation of a baseline FHR between uterine contractions or periodic changes in the
FHR and non-periodic, short-term fluctuations in the FHR. See Deceleration. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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in fetal heart rate monitoring, a transient decrease in heart rate that coincides with the onset of a uterine contraction. in fetal heart rate monitoring, a transient decrease in heart rate that coincides with the onset of a uterine contraction. in fetal heart rate monitoring, a transient decrease in heart rate that coincides with the onset of a uterine contraction. |
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