Inpatient Obstetric Nurse (NCC) Practice Exam

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For fetuses over 30 weeks gestation, what FHR value is considered tachycardia?

150 bpm
160 bpm
170 bpm
180 bpm

The correct answer is: 160 bpm

Fetal heart rate (FHR) is an important parameter monitored during pregnancy, particularly in the context of assessing fetal well-being in utero. For fetuses over 30 weeks gestation, a baseline heart rate greater than 160 beats per minute (bpm) is classified as tachycardia. This threshold is critical because it indicates the need for further assessment and potential intervention, as prolonged tachycardia could suggest various underlying issues such as fetal distress, maternal fever, infection, or other complications. Understanding that a normal fetal heart rate ranges typically from 110 to 160 bpm helps clarify why 160 bpm serves as the upper limit of normal in this gestational age group. When the FHR crosses this threshold, it serves as an important clinical marker to evaluate the overall health and status of the fetus, thereby guiding further clinical decisions and management during labor and delivery.