baseline variability


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Related to baseline variability: variable deceleration

baseline variability

Fluctations in the fetal heart rate, recorded by the electronic monitor, that reflect the status of the fetal autonomic nervous system. Absence of short-term variability (beat-to-beat changes) is a sign of fetal compromise. Long-term variability (wavelike undulations) occurs normally three to five times per minute. Increased long-term variability is common during fetal sleep but may reflect prematurity, congenital abnormalities such as anencephaly, or fetal response to drugs.
See also: variability
References in periodicals archive ?
If they drop less than 15 beats per minute and/or last less than 15 seconds they are simply part of the baseline variability.
Baseline variability should no longer be described using colorful but nebulous terms such as good, OK, present, diminished, somewhat diminished, fine, nice, excellent, exaggerated, or great.
LAS VEGAS -- When assessing variable decelerations in the second stage of labor, measure their depth and duration but also determine how those decelerations are affecting the baseline variability and baseline rate, Suzanne McMurtry Baird, a registered nurse clinician, advised at a conference on fetal monitoring sponsored by Symposia Medicus.