title: Contrast-enhanced MRI index of diffuse myocardial fibrosis is increased in primary aldosteronism.
abstract: OBJECTIVE
  To assess the degree of myocardial fibrosis in patients with primary aldosteronism (PA).
  
  
  METHODS
  Twenty-five patients with PA and 12 age-matched healthy volunteers underwent cine and late gadolinium enhancement (LGE) magnetic resonance imaging (MRI) on a 1.5 T MR system. From volume-time curves of cine MRI, the time for deceleration (Tdec) was determined to assess the left ventricle (LV) chamber stiffness. Based on phase-sensitive reconstructed LGE images, a fibrosis index called enhancement value (EV) was computed as the signal intensity change in the myocardium over blood before and after contrast. Both Tdec and EV were compared between patients and controls. The association between Tdec and EV was investigated.
  
  
  RESULTS
  Patients showed a significantly higher EV (0.43 ± 0.05 vs. 0.36 ± 0.07; P = 0.002) and a significantly shorter Tdec (11.5 ± 3.5 %RR vs. 15.3 ± 2.4 %RR; P = 0.004) than controls. Significant correlations between EV and Tdec were observed in patients (r = -0.46, P = 0.018), in controls (r = -0.68, P = 0.015) and in all subjects (r = -0.63, P < 0.001).
  
  
  CONCLUSIONS
  The fibrosis index is increased in patients with PA and the increase imposes an adverse effect on LV diastolic function.
authors.affiliation: Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan.
authors.forename: Mao-Yuan M
authors.initials: MY
authors.lastname: Su
authors.forename: Vin-Cent
authors.initials: VC
authors.lastname: Wu
authors.forename: Hsi-Yu
authors.initials: HY
authors.lastname: Yu
authors.forename: Yen-Hung
authors.initials: YH
authors.lastname: Lin
authors.forename: Chin-Chi
authors.initials: CC
authors.lastname: Kuo
authors.forename: Kao-Lang
authors.initials: KL
authors.lastname: Liu
authors.forename: Shuo-Meng
authors.initials: SM
authors.lastname: Wang
authors.forename: Shih-Chieh
authors.initials: SC
authors.lastname: Chueh
authors.forename: Lian-Yu
authors.initials: LY
authors.lastname: Lin
authors.forename: Kwan-Dun
authors.initials: KD
authors.lastname: Wu
authors.forename: Wen-Yih I
authors.initials: WY
authors.lastname: Tseng
mesh_terms: D000465:Algorithms; D003287:Contrast Media; D004719:Endomyocardial Fibrosis / Q000209:etiology* / Q000473:pathology*; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D006929:Hyperaldosteronism / Q000150:complications* / Q000175:diagnosis / Q000473:pathology; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D003287:Contrast Media; C064925:gadodiamide; D019786:Gadolinium DTPA