Vascular responses to abrupt blood flow change after bypass surgery for complex intracranial aneurysms
| Autor: | Hidehiro Iida, Soshiro Ogata, Satoshi Iguchi, Masanori Nakamura, Kunihiro Nishimura, Yohei Kimura, Yasuhide Makino, Takanobu Yagi, Koji Iihara, Kenji Takamura, Akihide Yamamoto, Kiyofumi Takanishi, Mitsuo Umezu, Hiroharu Kataoka, Jun Takahashi |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male medicine.medical_specialty Positive correlation 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Postoperative Complications Preoperative level Internal medicine Healthy volunteers medicine Humans medicine.diagnostic_test Cerebral Revascularization business.industry Hemodynamics Magnetic resonance imaging Intracranial Aneurysm Blood flow Cerebral Arteries Middle Aged Magnetic Resonance Imaging Vessel diameter Bypass surgery cardiovascular system Cardiology Surgery Female Neurology (clinical) Stress Mechanical business 030217 neurology & neurosurgery circulatory and respiratory physiology |
| Zdroj: | Acta neurochirurgica. 160(10) |
| ISSN: | 0942-0940 |
| Popis: | Bypass surgery for complex intracranial aneurysms (IAs) results in drastic blood flow changes in intracranial arteries. The aim of the study was to elucidate how vessels adapt to blood flow changes after bypass surgery with phase-contrast magnetic resonance imaging (PC-MRI). This is a prospective observational study to assess changes of the blood flow in intracranial arteries after bypass surgery for IAs. Flow rates and vessel diameters were measured with PC-MRI in 52 intracranial arteries of 7 healthy volunteers and 31 arteries of 8 IA patients who underwent bypass surgery. Wall shear stress (WSS) was calculated with the Hagen-Poiseuille formula. In 18 arteries of 5 patients, the same measurement was performed 1, 3, and 12 months after surgery. PC-MRI showed a strong positive correlation between the flow rate and the third power of vessel diameter in both healthy volunteers (r = 0.82, P |
| Databáze: | OpenAIRE |
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