Echocardiographic evaluation of prosthetic heart valve function

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Diagnostic echocardigraphy developed rapidly in these several years, and many reports have reviewed the echocardiographic characteristics of the implanted prosthetic valves.This study investigates the application of echocardiography in the diagnosis of the function of implanted prosthetic valves, by marking observation of the echocardiographic motion pattern of various type of pros-thetic valves in patients.In the cases with prosthetic mitral valves, it was able to diagnose that the disc motion was disturbed by thrombus and fibrogranulomatous tissue on the strut and suture ring, but it was not able to find that the disc motion was not disturbed but valve had thrombus on the only part of the disc. The former were found in three cases; one Kay-Shiley valve, one Starr-Edwards metal disc valve, one Bjark-Shiley valve. The latter were found one case; one Kay-Shiley valve.In the cases with implanted prosthetic aortic valves, it was difficult to observe its total excursion, because the echo beam is at right angles to the valve motion when the echo transducer is placed at conventional position for obtaining an echocardiogram of the normal mitral valve. And the aortic valve was not able to trace from the supraclavicular fossa.Echocardiography is useful for assessment of prosthetic mitral valve function, it is able to examine noninvasively, raedily and repeatedly again and again. Patients with prosthetic valves should be followed by echocardiography comparing initial echocardiogram recorded postoperatively as soon as potsible with seril observation in order to assess more accurately.But, it is dangerous to diagnose by echocardiogram alone the prosthetic valve malfunction, so it is nece-ssary to evaluate it whole clinical data and clinical findings
一般社団法人日本人工臓器学会の論文

Echocardiographic evaluation of prosthetic heart valve function

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