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Direct Superficial Temporal Artery-Proximal Middle Bypass in Moyamoya Disease: Predicting Postoperative Symptomatic
Rebecca Achey1, Cynthia Uzoukwu2, Xuefeng Liu3
1Department of Neurosurgery, Cerebrovascular Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio, USA.
World Neurosurgery
|December 13, 2024
Summary
Contralateral stroke (CS) after superficial temporal artery-proximal middle cerebral artery (STA-MCA) bypass in Moyamoya disease (MMD) patients is linked to higher preoperative blood pressure and delayed surgery. Careful postoperative blood pressure management and timely revascularization are key to preventing CS.
Area of Science:
- Neurosurgery
- Cerebrovascular Medicine
- Vascular Surgery
Background:
- Moyamoya disease (MMD) is a rare cerebrovascular condition causing progressive narrowing of the internal carotid arteries.
- Superficial temporal artery-proximal middle cerebral artery (STA-MCA) bypass surgery can restore blood flow to at-risk brain areas.
- Symptomatic contralateral stroke (CS) is a serious complication following STA-MCA bypass in MMD patients.
Purpose of the Study:
- To identify clinical and radiographic risk factors associated with contralateral stroke (CS) after STA-MCA bypass in Moyamoya disease (MMD) patients.
- To elucidate factors contributing to the incidence of CS in MMD patients undergoing bypass surgery.
Main Methods:
- Retrospective review of 39 MMD patients who underwent bilateral STA-MCA bypass between 2018 and 2022.
- Analysis of demographic data, comorbidities, preoperative systolic blood pressure (SBP), postoperative SBP goals, and preoperative angiographic collateral patterns.
- Comparison of clinical and radiographic factors between patients who did and did not experience CS post-surgery.
Main Results:
- Six out of 39 patients (15.4%) developed CS post-STA-MCA bypass.
- CS patients exhibited higher preoperative SBP, were more likely to have postoperative SBP goals below their preoperative SBP, and had a longer delay from symptom onset to surgery.
- No significant differences in specific angiographic patterns were observed, although overall contralateral Suzuki grade was higher in CS patients.
Conclusions:
- Higher preoperative SBP, aggressive postoperative SBP reduction, and delayed surgical intervention are associated with an increased risk of CS in MMD patients.
- Individualized postoperative SBP management and prompt surgical revascularization are critical for preventing CS after STA-MCA bypass in MMD.
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