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Three‐Dimensional Imaging of Mitral and Tricuspid Annuli for Total Artificial Heart Implantation
Author(s) -
Komoda Takeshi,
Uyama Chikao,
Maeta Hajime,
Sanou Kazuo
Publication year - 1992
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.1992.tb00330.x
Subject(s) - ascending aorta , medicine , mitral annulus , tricuspid valve , anatomy , cadaver , cardiology , annulus (botany) , magnetic resonance imaging , diastole , systole , tricuspid insufficiency , pulmonary artery , aorta , materials science , radiology , blood pressure , composite material
The establishment of a method to clarify the three‐dimensional interrelations among the mitral annulus, tricuspid annulus, ascending aorta, and main pulmonary artery, which constitute the interface between the human and total artificial heart (TAH), is essential to the design of the TAH. In a previous study based on transverse magnetic resonance (MR) images of a live human heart, reconstructed images of mitral and tricuspid annuli were found to be deformed. The present study of cadaver and beating hearts revealed that the optimal conditions for atrioventricular annular reconstruction of a beating heart with electrocardiogram‐gated MR imaging include use of four‐chamber imaging, 5 mm slice thickness, and a slice interval ranging from 5 to 7 mm. Under these conditions, the mitral and tricuspid annuli of 3 beating hearts were reconstructed successfully. It was recognized that during the systolic phase the mitral and tricupid annuli move anteriorly, leftward and downward, and that in late systole the right lateral margin of the tricuspid annulus is close to the sternum.