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Sawtooth fetal heart rate pattern due to in utero fetal central nervous system injury

Published:December 07, 2015DOI:https://doi.org/10.1016/j.ajog.2015.11.036
      We present 3 cases of documented central nervous system (CNS) injury with a characteristic fetal heart rate (FHR) sawtooth-like pattern. In the first case, there was category I fetal heart tracing during labor, which was followed by a sudden onset of fetal tachycardia, unstable and indeterminate baseline, and episodes of a sawtooth FHR pattern (Figure 1).
      Figure thumbnail gr1
      Figure 1Sawtooth pattern tracings
      A, Sudden onset of fetal tachycardia with sawtooth pattern. B, Sawtooth pattern with unstable baseline.
      Andrikopoulou & Vintzileos. Sawtooth pattern and fetal central nervous system injury. Am J Obstet Gynecol 2016.
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