title: Aortic compliance in patients with aortic regurgitation: evaluation with magnetic resonance imaging.
abstract: OBJECTIVE
  To assess by means of cine magnetic resonance imaging (MRI) aortic compliance before and after aortic valve replacement (AVR with SJM valve) in patients with aortic regurgitation (AR).
  
  
  METHODS
  Two groups (healthy controls and patients with severe isolated AR) of 10 subjects each were included in this study. Cine MRI was performed at three locations of the aorta, and aortic compliance was calculated by dividing the maximum change in the aortic area by pulse pressure.
  
  
  RESULTS
  Cine MRI is useful to assess abnormalities of aortic compliance in patients with AR. Compared with the control group, aortic compliance in the AR group was significantly less in the ascending aorta (p<0.05), decreasing in order of aortic location. After AVR, aortic compliance improved for all locations.
  
  
  CONCLUSIONS
  Cine MRI enables assessment of aortic biophysical properties such as a compliance for evaluating the progression of AR and the efficacy of treatment.
authors: Department of Radiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Sachiko
authors: S
authors: Murai
authors: Seiki
authors: S
authors: Hamada
authors: Takashi
authors: T
authors: Ueguchi
authors: Azzam A
authors: AA
authors: Khankan
authors: Hiromitsu
authors: H
authors: Sumikawa
authors: Atsuo
authors: A
authors: Inoue
authors: Mitsuko
authors: M
authors: Tsubamoto
authors: Osamu
authors: O
authors: Honda
authors: Noriyuki
authors: N
authors: Tomiyama
authors: Takeshi
authors: T
authors: Johkoh
authors: Hironobu
authors: H
authors: Nakamura
mesh_terms: D000328:Adult; D000368:Aged; D001011:Aorta / Q000503:physiopathology*; D001022:Aortic Valve Insufficiency / Q000503:physiopathology* / Q000601:surgery; D003187:Compliance; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D019028:Magnetic Resonance Imaging, Cine; D008297:Male; D008875:Middle Aged