The measurement of opening angle and orifice area of a bileaflet mechanical valve using multidetector computed tomography

The aim of this study was to assess mechanical valve function using 64-slice multidetector computed tomography (MDCT). In 20 patients (mean age, 50+/-12 years; male-to-female ratio, 10:10), 30 St. Jude bileaflet mechanical valves (15 aortic and 15 mitral valves) were evaluated using MDCT. We selecte...

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Bibliographic Details
Published in:Korean circulation journal 2009, 39(4), , pp.157-162
Main Authors: Lee, Dong-Hyeon, Youn, Ho-Joong, Shim, Sung-Bo, Lee, Sun-Hee, Jung, Jung-Im, Jung, Seung-Eun, Choi, Yun-Seok, Park, Chul-Soo, Oh, Yong-Seog, Chung, Wook-Sung, Kim, Jae-Hyung
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Language:English
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내과학
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Summary:The aim of this study was to assess mechanical valve function using 64-slice multidetector computed tomography (MDCT). In 20 patients (mean age, 50+/-12 years; male-to-female ratio, 10:10), 30 St. Jude bileaflet mechanical valves (15 aortic and 15 mitral valves) were evaluated using MDCT. We selected images vertical and parallel to the mechanical valve. The valve orifice area (OA) and valve length were determined by manual tracing and the opening and closing angles were measured using a protractor. The OA and length of the mechanical valves were compared with the manufacturer's values. The geometric orifice areas (GOAs) based on the manufacturer's values and the OAs determined by MDCT were 3.4+/-0.2 cm(2) and 3.4+/-0.3 cm(2) for the mitral valves and 2.1+/-0.3 cm(2) and 2.1+/-0.4 cm(2) for the aortic valves, respectively. The correlation coefficients between the OA measures were 0.433 for the mitral valves and 0.874 for the aortic valves (both p
ISSN:1738-5520
1738-5555
DOI:10.4070/kcj.2009.39.4.157