2010
DOI: 10.1016/j.jtcvs.2009.11.001
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Intermittent regurgitation caused by incomplete leaflet closure of the Medtronic ADVANTAGE bileaflet heart valve: Analysis of the underlying mechanism

Abstract: In vitro intermittent regurgitation can be induced in the size 23 aortic ADVANTAGE valve under a limited range of conditions. To avoid possible misinterpretations, the phenomenon must be known in detail by all physicians dealing with patients with an ADVANTAGE valve.

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Cited by 8 publications
(8 citation statements)
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“…This means that the left ventricle must pump more blood than normal and will gradually get bigger because of the extra workload. In a recent in vitro study, Enchinger et al [42] showed that intermittent regurgitation could occur in an aortic ADVANTAGE valve in the horizontal orientation, in which gravity maximized the asymmetric closure of the leaflets. The asymmetric closure of the leaflets caused the leading edge of the second-to-close leaflet to make contact with the chamfer on the leading edge of the first-to-close leaflet [42].…”
Section: Discussionmentioning
confidence: 99%
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“…This means that the left ventricle must pump more blood than normal and will gradually get bigger because of the extra workload. In a recent in vitro study, Enchinger et al [42] showed that intermittent regurgitation could occur in an aortic ADVANTAGE valve in the horizontal orientation, in which gravity maximized the asymmetric closure of the leaflets. The asymmetric closure of the leaflets caused the leading edge of the second-to-close leaflet to make contact with the chamfer on the leading edge of the first-to-close leaflet [42].…”
Section: Discussionmentioning
confidence: 99%
“…In a recent in vitro study, Enchinger et al [42] showed that intermittent regurgitation could occur in an aortic ADVANTAGE valve in the horizontal orientation, in which gravity maximized the asymmetric closure of the leaflets. The asymmetric closure of the leaflets caused the leading edge of the second-to-close leaflet to make contact with the chamfer on the leading edge of the first-to-close leaflet [42]. In addition, the rebound of leaflets has been related to the formation of cavitation that might cause hemolysis and wear for tilting-disk MHVs [6].…”
Section: Discussionmentioning
confidence: 99%
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“…Zjawisko to nie zmieniało się w czasie, nie było także związane z żadną patologią zastawki i nie zależało od arytmii. W badaniu z ośrodka w Monachium stwierdzono występowanie tego fenomenu w 7 przypadkach na 63 przebadanych pacjentów [4]. W przeprowadzonej analizie radiologicznej stwierdzono okresowe, niecałkowite domknięcie się jednego z dwóch dysków, przy czym mogło to dotyczyć każdego z zaworów.…”
Section: Dyskusjaunclassified
“…Ten sam ośrodek przebadał 6 protez Medtronic Advantage 23 mm w warunkach in vitro [5]. Opisywane zjawisko wywołano w każdej z badanych zastawek.…”
Section: Dyskusjaunclassified