AWHONN Intermediate Fetal Monitoring
Exam
If fetal arterial pressure begins to fall below normal levels: - Answer -A. BARORECEPTORS CAUSE
VASOCONSTRICTION AND INCREASE THE FHR
An increase in arterial blood pressure produces vessel distension and causes arterial baroreceptors to
send neuronal messages to the cardioinhibitory center, which in turn causes rapid slowing of the fetal
heart rate via the parasympathetic vagus nerve. A decrease in arterial pressure results in an increased
heart rate.
Source: https://perigen.com/what-regulates-fetal-heart-rate/
Which of the following is an extrinsic influence on the FHR? - Answer -Fetal-placental circulation
Fetal heart rate vaiability is definded as fluctuations in the baseline that are irregular in - Answer -
AMPLITUDE and FREQUENCY
The most highly oxygenated blood in fetal circulation is carried by: - Answer -Ductus venosus
An increase in the fetal heart rate immediately preceding a variable deceleration is caused by: - Answer -
Occlusion of the umbilical vein
The etiology of variable decelerations is likely related to umbilical venous and arterial occlusion. Initially,
with occlusion of the thin-walled umbilical vein, venous return to the fetal right atrium is reduced,
producing a reflex tachycardia. This pattern often is observed as a shoulder on the FHR monitor strip
immediately before the abrupt variable FHR deceleration
Exam
If fetal arterial pressure begins to fall below normal levels: - Answer -A. BARORECEPTORS CAUSE
VASOCONSTRICTION AND INCREASE THE FHR
An increase in arterial blood pressure produces vessel distension and causes arterial baroreceptors to
send neuronal messages to the cardioinhibitory center, which in turn causes rapid slowing of the fetal
heart rate via the parasympathetic vagus nerve. A decrease in arterial pressure results in an increased
heart rate.
Source: https://perigen.com/what-regulates-fetal-heart-rate/
Which of the following is an extrinsic influence on the FHR? - Answer -Fetal-placental circulation
Fetal heart rate vaiability is definded as fluctuations in the baseline that are irregular in - Answer -
AMPLITUDE and FREQUENCY
The most highly oxygenated blood in fetal circulation is carried by: - Answer -Ductus venosus
An increase in the fetal heart rate immediately preceding a variable deceleration is caused by: - Answer -
Occlusion of the umbilical vein
The etiology of variable decelerations is likely related to umbilical venous and arterial occlusion. Initially,
with occlusion of the thin-walled umbilical vein, venous return to the fetal right atrium is reduced,
producing a reflex tachycardia. This pattern often is observed as a shoulder on the FHR monitor strip
immediately before the abrupt variable FHR deceleration
