Acceleration of blood flow as an indicator of improved hemodynamics after indirect bypass surgery in Moyamoya disease

• Published in: Clinical neurology and neurosurgery 2017-09, Vol.160, p.92-95
• Main Authors: Ogawa, Sayaka, Ogata, Toshiyasu, Shimada, Hirofumi, Abe, Hiroshi, Katsuta, Toshiro, Fukuda, Kenji, Inoue, Tooru
• Format: Article
• Language: English
• Subjects: Adult; Adults; Blood flow; Blood Flow Velocity - physiology; Brain - blood supply; Carotid arteries; Cerebral Revascularization - methods; Circulatory system; Encephalo-duro-arterio-synangiosis (EDAS); Female; Follow-Up Studies; Heart surgery; Hemodynamics; Humans; Male; Mean velocity (MV); Middle Aged; Moyamoya disease; Moyamoya Disease - diagnostic imaging; Moyamoya Disease - surgery; Neurology; Outcome Assessment (Health Care) - methods; Patients; Resistance index (RI); Stents; Stroke; Superficial temporal artery (STA); Surgery; Surgical outcomes; Temporal Arteries - diagnostic imaging; Temporal Arteries - surgery; Ultrasonic imaging; Ultrasonography, Doppler, Transcranial; Ultrasound; Vascular Resistance - physiology; Veins & arteries; Velocity
• ISSN: 0303-8467; 1872-6968
• DOI: 10.1016/j.clineuro.2017.06.013

•Mean velocity (MV) and resistance index (RI) were used as ultrasonography markers.•MV was increased in the STA main trunk and branches at 3 months after EDAS.•RI was decreased at 14days after EDAS.•MV and RI time-courses differed in subgroups of patients divided by EDAS outcome. : The ultrasonography findings in the superficial temporal artery (STA) in Moyamoya disease patients treated with indirect bypass remain unclear. We evaluated the time-related changes in ultrasonography findings of the STA main trunk and branches in patients with Moyamoya disease who underwent encephalo-duro-arterio-synangiosis (EDAS). Patients (n=21, 30 sides) with Moyamoya disease who underwent EDAS at Fukuoka University Hospital were prospectively registered between 2008 and 2015. EDAS using the frontal and parietal branches of the STA was adopted in an indirect bypass procedure. Mean velocity (MV) and resistance index (RI) were used as ultrasonography markers, and their changes over time in the STA main trunk and branches were assessed. There was a significant increase in MV in both the STA main trunk (p=0.001) and branches (frontal: p=0.005, parietal: p=0.003) at 3 months after EDAS, whereas there was a decrease in RI at 14days after EDAS (main trunk: p