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Fetal Heart Rate

Influences on Fetal Heart Rate Control

Physiology Effect on Fetal Heart Rate
Parasympathetic Nervous System Slow FHR
Sympathetic Nervous System Increases FHR
Intermittent fetal hypoxemia causes_________. Increase in FHR or brief tachycardia
CO=HR x SV Heart rate x stroke volume Formula for adult cardiac output
Baroreceptors Detect changes in arterial blood pressure
Fetal cardiac output depends on ________. Heart Rate
Increase in arterial blood pressure Abrupt decrease in FHR, CO and BP
Increased PCO2 stimulates Chemoreceptors to slow FHR
Head compression Early Deceleration
Cord compression Variable Deceleration
Utero placental insufficiency Late Deceleration
Anemia Sinusoidal Pattern
Awesome Participants
Renin-angiotensin system Maintains umbilical placental blood flow
Prostaglandins Regulation of umbilical blood flow Maintains patency of fetal ductus arteriosus
Quiet sleep Responds to vibroacoustic stimulation
Definition of quiescence Occasional brief body movements
Active (REM) sleep Reactive NST
Absent REM Non-Reactive NST
Preterm Heart rates are faster, decrease variability
Circulation time from fetal-placental site to chemoreceptors. Decelerations
Created by: fwimsatt
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