Hidetsugu Maekawa

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Aneurysmal subarachnoid hemorrhage is the most devastating form of stroke. Many pathological mechanisms ensue after cerebral aneurysm rupture, including hydrocephalus, apoptosis of endothelial cells and neurons, cerebral edema, loss of blood-brain barrier, abnormal cerebral autoregulation, microthrombosis, cortical spreading depolarization and macrovascular(More)
Middle meningeal artery aneurysm associated with meningioma is extremely rare, and only two cases have previously been reported. In our case, a 72-year-old woman with convexity meningioma underwent preoperative cerebral angiography, which revealed a flow-related aneurysm on the middle meningeal artery. Embolization of the aneurysm was performed with(More)
A state traversal algorithm based on control theory and its application to sequential ATPG is presented. In the algorithm, next states are evaluated by an objective function representing "unlikeliness" to reach each of the previously traversed states. Experimental results show that many states are efficiently traversed and that our proposed ATPG can achieve(More)
Cerebral proliferative angiopathy (CPA) is a rare vascular abnormality with several angiomorphological features that are distinct from brain arteriovenous malformations (AVMs). The natural history of CPAs indicates a lower risk for hemorrhage compared to brain AVMs. A 62-year-old woman presented with gait instability and dysarthria. MRI and angiography(More)
BACKGROUND The basilar bifurcation aneurysm (BBA) is still considered to be one of the most challenging aneurysms for micro- and endovascular surgery. Classic surgical approaches, such as subtemporal, lateral supraorbital (LSO), and modified presigmoid, are still reliable and effective. OBJECTIVE To analyze the clinical and radiological factors that(More)
INTRODUCTION Epidemiological studies suggest that postmenopausal estrogen deficiency is responsible for the increased risk of aneurysmal subarachnoid hemorrhage, while menopausal hormone therapy is protective against cerebral aneurysms. These findings indicate the critical role of estrogen in the pathophysiology of cerebral aneurysm. AREAS COVERED Here,(More)
OBJECTIVE The presigmoid approach can be used to treat vertebrobasilar artery aneurysms when circumstances require more operative exposure. High morbidity and mortality in these cases have been reported. In this study, we describe our modified presigmoid approach for vertebrobasilar artery aneurysms and our clinical results. METHODS This series includes(More)
OBJECTIVE The Sylvian fissure has been dissected through the frontal side of the superficial Sylvian veins with sacrifice of the tributaries of the frontal superficial Sylvian vein, which may lead to venous infarction. In addition, disturbed venous drainage makes the brain susceptible to brain retraction. Therefore, preservation of the vein is essential in(More)