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Functional property of the cardiac valve prosthesis evaluated in vivo by cine-radiography

Journal Article:

Abstract

Functional property of the convexo-concave Bjoerk-Shiley cardiac valve prosthesis implanted in the mitral position of 21 patients was investigated by integrated cine-radiography repeated for a long term after operation. The maximum opening angle of the tilting disc was 58 +- 2 deg, and was not affected by atrial fibrillation nor by tachycardia up to 160 bpm. There was no change in the maximum opening angle of the disc observed during follow-up period. Good correlation between shortning of the disc opening time and increase in pulse rate suggests excellent adaptation of this prosthesis for tachycardia induced by exercise or electric pacing. However, atrial fibrillation causes time delay in disc closure immediately after prolonged R-R interval. Disc rotation alleviating disc wear was observed in all the patients whether it moves slow or quick. Dysfunction of the disc opening can be readily determined not only by measuring the maximum disc opening angle, but also by observing the characteristic movement indicated in this study. It is concluded from these results that clinical apprication for the convexo-concave Bjoerk-Shiley valve prosthesis is appropriate and cine-radiography is an useful non-invasive examination of cardiac valve prosthesis for long follow-up period.
Publication Date:
Jul 01, 1986
Product Type:
Journal Article
Reference Number:
AIX-18-051532; EDB-87-089785
Resource Relation:
Journal Name: Tokyo Ika Daigaku Zasshi; (Japan); Journal Volume: 44:4
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; ARTIFICIAL ORGANS; BIOMEDICAL RADIOGRAPHY; MECHANICAL HEART; DYNAMIC FUNCTION STUDIES; IN VIVO; MECHANICAL TESTS; PATIENTS; TIME DEPENDENCE; TRANSPLANTS; DIAGNOSTIC TECHNIQUES; MATERIALS TESTING; MEDICAL SUPPLIES; MEDICINE; NUCLEAR MEDICINE; PROSTHESES; RADIOLOGY; TESTING; 550602* - Medicine- External Radiation in Diagnostics- (1980-)
OSTI ID:
6592731
Research Organizations:
Tokyo Medical Coll., Japan
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: TIDZA
Submitting Site:
INIS
Size:
Pages: 597-604
Announcement Date:
Jun 01, 1987

Journal Article:

Citation Formats

Murakoshi, Sadaaki. Functional property of the cardiac valve prosthesis evaluated in vivo by cine-radiography. Japan: N. p., 1986. Web.
Murakoshi, Sadaaki. Functional property of the cardiac valve prosthesis evaluated in vivo by cine-radiography. Japan.
Murakoshi, Sadaaki. 1986. "Functional property of the cardiac valve prosthesis evaluated in vivo by cine-radiography." Japan.
@misc{etde_6592731,
title = {Functional property of the cardiac valve prosthesis evaluated in vivo by cine-radiography}
author = {Murakoshi, Sadaaki}
abstractNote = {Functional property of the convexo-concave Bjoerk-Shiley cardiac valve prosthesis implanted in the mitral position of 21 patients was investigated by integrated cine-radiography repeated for a long term after operation. The maximum opening angle of the tilting disc was 58 +- 2 deg, and was not affected by atrial fibrillation nor by tachycardia up to 160 bpm. There was no change in the maximum opening angle of the disc observed during follow-up period. Good correlation between shortning of the disc opening time and increase in pulse rate suggests excellent adaptation of this prosthesis for tachycardia induced by exercise or electric pacing. However, atrial fibrillation causes time delay in disc closure immediately after prolonged R-R interval. Disc rotation alleviating disc wear was observed in all the patients whether it moves slow or quick. Dysfunction of the disc opening can be readily determined not only by measuring the maximum disc opening angle, but also by observing the characteristic movement indicated in this study. It is concluded from these results that clinical apprication for the convexo-concave Bjoerk-Shiley valve prosthesis is appropriate and cine-radiography is an useful non-invasive examination of cardiac valve prosthesis for long follow-up period.}
journal = {Tokyo Ika Daigaku Zasshi; (Japan)}
volume = {44:4}
journal type = {AC}
place = {Japan}
year = {1986}
month = {Jul}
}