Objective: Neurologic deterioration is the primary distinctive complication after revascularization surgery in patients with moyamoya disease (MMD). The present study investigated the risk factors for neurologic deterioration after combined direct and indirect revascularization in patients with MMD.
Methods: A retrospective review of 123 patients with MMD undergoing 138 combined direct and indirect revascularization procedures was performed. Demographics, clinical manifestation, medical history, neurologic deterioration complications, and relevant information of the operation were recorded.
Results: There were 25 (18.12%) postoperative neurologic deterioration complications (13 reversible neurologic deficits, 9 infarctions with neurologic sequelae, and 3 hemorrhages). Preoperative multiple symptom episodes and one-staged bilateral revascularization were significantly correlated with postoperative neurologic deterioration complications (P < 0.05 and P < 0.01, respectively). The incidence rate (26.39%) of postoperative neurologic deterioration in ischemic MMDs was significantly greater than hemorrhagic MMDs (7.69%; P < 0.01) In total, 34.78% of patients with transient ischemic attack onset and 22.45% of patients with infarction onset suffered from postoperative neurologic deterioration, and there was no significant difference between them (P > 0.05). Postoperative neurologic deterioration complications had no significant correlation with sex, age at the time of surgery, type of surgical procedure, unilateral MMD or not, interval between the last attack and operation, and history of thyroid disease, hypertension, and autoimmune disease.
Conclusions: Preoperative multiple symptom episodes and one-staged bilateral revascularization are risk factors associated with postoperative neurologic deterioration in patients with MMD. Therefore, 2 unilateral revascularization procedures performed successively rather than one-staged bilateral revascularization procedures should be performed in patients with bilateral MMD.
Keywords: Moyamoya disease; Postoperative complications; Revascularization; Risk factors.
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