title: Hemodynamic study with duplex ultrasonography on combined (direct/indirect) revascularization in adult moyamoya disease.
abstract: BACKGROUND
  To evaluate the hemodynamic changes by duplex ultrasonography in adult moyamoya disease (MMD) patients who underwent combined direct and indirect revascularization surgery.
  
  
  METHODS
  Seventeen adult patients underwent direct and indirect revascularization surgery in our hospital. Hemodynamic parameters, peak systolic velocity (PSV), end-diastolic velocity (EDV) and resistance index (RI), were determined by color Doppler at the baseline, 2 weeks, and 6 months after bypass.
  
  
  RESULTS
  Both the PSV and EDV of direct bypass were lower at 6 months after surgery compared with those at 2 weeks postoperatively. The EDV of indirect revascularization surgery of the maxillary artery (MA) at 6 months after surgery was higher and the RI of the MA lower compared with the baseline levels. Decreased PSV and EDV in the bypass vessel did not significantly correlate with increased EDV or decreased RI of the MA.
  
  
  CONCLUSIONS
  Duplex ultrasonography is a reliable, noninvasive tool to assess hemodynamic changes and evaluate the therapeutic performance of combined bypass surgery in adult MMD.
authors.affiliation: Department of Ultrasound, Fudan University Affiliated Huashan Hospital Jing'An Branch, Shanghai, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Ultrasound, Fudan University Affiliated Huashan Hospital Jing'An Branch, Shanghai, China.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.affiliation: Department of Ultrasound, Fudan University Affiliated Huashan Hospital Jing'An Branch, Shanghai, China.
authors.forename: Yida
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Ultrasound, Fudan University Affiliated Huashan Hospital Jing'An Branch, Shanghai, China.
authors.forename: Huiwen
authors.initials: H
authors.lastname: Pan
authors.affiliation: Department of Ultrasound, Fudan University Affiliated Huashan Hospital Jing'An Branch, Shanghai, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Neurosurgery, Fudan University Affiliated Huashan Hospital, Shanghai, China. Electronic address: xubinww@yahoo.com.
authors.forename: Bin
authors.initials: B
authors.lastname: Xu
authors.affiliation: Department of Neurosurgery, Fudan University Affiliated Huashan Hospital, Shanghai, China.
authors.forename: Yujun
authors.initials: Y
authors.lastname: Liao
mesh_terms: D000328:Adult; D001783:Blood Flow Velocity; D002548:Cerebral Revascularization / Q000379:methods*; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008438:Maxillary Artery / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008875:Middle Aged; D009072:Moyamoya Disease / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome; D018616:Ultrasonography, Doppler, Duplex; D014655:Vascular Resistance
keywords: Duplex ultrasonography; Moyamoya disease; combined (Direct/Indirect) bypass surgery; hemodynamics; maxillary artery (MA); superficial temporal artery (STA)