MISC

1996年

Value and limitations of valve resistance in assessing prosthetic aortic valve function: Clinical study using dobutamine stress Doppler echocardiography

Journal of Cardiology
  • H. Okura
  • ,
  • J. Yoshikawa
  • ,
  • K. Yoshida
  • ,
  • T. Akasaka
  • ,
  • M. Shakudo
  • ,
  • T. Hozumi
  • ,
  • T. Takagi
  • ,
  • Y. Honda
  • ,
  • A. Yamamuro

27
1
開始ページ
9
終了ページ
13
記述言語
日本語
掲載種別

Hemodynamic resistance may be a useful index for the severity of valvular aortic stenosis, but little is known about the utility of valve resistance in assessing the prosthetic aortic valve function. This study investigated whether valve resistance is useful in assessing prosthetic valve function in 13 patients with normally functioning CarboMedics prosthetic aortic valves. Transvalvular pressure gradient, effective orifice area and valve resistance derived from two-dimensional and Doppler echocardiography were calculated before and after dobutamine infusion. Dobutamine was infused incrementally (3-12 μg/kg/min) under echocardiographic imaging. Transvalvular pressure gradient (24 ± 7 → 53 ± 18 mmHg, p &lt
0.01) and valve resistance (102 ± 32 → 140 ± 57 dynes · sec · cm · p &lt
0.01) significantly increased after dobutamine infusion. However, effective orifice area did not increase significantly (1.1 ± 10.5 → 1.2 ± 0.5 cm2). These findings indicate that transvalvular pressure gradient and valve resistance are flow-dependent and should be treated with caution when assessing prosthetic valve function.

リンク情報
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/8683434
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0030060680&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=0030060680&origin=inward
ID情報
  • ISSN : 0914-5087
  • PubMed ID : 8683434
  • SCOPUS ID : 0030060680

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