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Noninvasive assessment of the degree of cardiovascular stenosis by velocimetry:accuracy for pressure gradient prediction Shizuo Hanya 1 , Motoaki Sugawara 2 , Akira Ishihara 1 1Department of Thoracic & Cardiovascular Surgery, Kitasato University School of Medicine 2Department of Surgical Science, The Heart Institute of Japan, Tokyo Women's Medical College, School of Medicine pp.317-323
Published Date 1987/3/15
DOI https://doi.org/10.11477/mf.1404205028
  • Abstract
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To assess the accuracy of Holen's equation (Δp=3. 9 U2) for the prediction of pressure gradient (dp), sim-ultaneous measurements of blood velocity and pressure across the stenosis were performed on 36 patients (pts) with stenotic lesions of the heart or great vessels using multisensor catheter. According to the morphological shape of stenosis, patients were divided in Group 1 with orifice-like shaped stenosis such as semilumar valvular stenosis and Group 2 with hour glass-shaped stenosis such as HOCM. Good correlations was found between peak jet velocity (U) and peak pressure gradient (r=0. 9457, p<0.01,Δp=3.6582 U2+3, 6458 U-4.6078) in Group 1, but there was no significant correlation in Group 2 (r=0.5486, n.s.). Direct measured 4 were compared with those calculated from U by using Δp= 3.9 U2. The correlation was y=1.080 x + 0.0.378 (r= 0.945, p<0.01) in Group 1 and y=0.258x+26.797 (r=0.229, n.s.) in Group 2. The close relation in Group 1 provides further validation of the use of velocimetry in the assessment of the peak pressure gradient. How-ever, in a group of pts with hourglass shaped stenosis, prudence should be exercised when predicting the pre-ssure gradient by velocimetry.


Copyright © 1987, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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