Cerebrovascular Events During Pregnancy and Puerperium Resulting from Preexisting Moyamoya Disease: Determining the Risk of Ischemic Events Based on Hemodynamic Status Assessment Using Brain Perfusion Single-Photon Emission Computed Tomography

World Neurosurgery
Si Un LeeSeong Yeol Ahn

Abstract

The purposes of this study were to review the cerebrovascular events (CVE) during pregnancy and puerperium in adults with moyamoya disease (MMD) and to evaluate its risk factors. We reviewed electronic medical records on 141 pregnancies in 71 women diagnosed with MMD and this study included only 27 pregnancies (23 patients) diagnosed with MMD before pregnancy. Basal and acetazolamide-stress brain perfusion single-photon emission computed tomography (SPECT) was conducted for 40 hemispheres in 21 pregnancies within 1 year of the gestational period, ranging from 22 months before delivery to 12 months after delivery for evaluation of the hemodynamic status of the patients to devise the MMD treatment strategy. Twelve pregnancies (44.4%) showed CVE during pregnancy or puerperium in the group diagnosed with MMD before pregnancy. All the 12 CVE were ischemic, without any hemorrhagic events. A decreased cerebral vascular reserve capacity (CVRC) on stress SPECT was observed in 25 (62.5%) of the 40 hemispheres, and 18 of these 25 hemispheres showed TIA. In contrast, only 2 of 15 hemispheres which revealed normal CVRC on stress SPECT showed TIA. Overall, a decreased CVRC on stress SPECT imaging was statistically associated with development...Continue Reading

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