Morphological and Dynamic Analysis of the Right Atrioventricular Junction in Healthy Subjects with 4D Computed Tomography.
Cardiovasc Eng Technol
; 13(5): 699-711, 2022 10.
Article
em En
| MEDLINE
| ID: mdl-35167041
ABSTRACT
PURPOSE:
To improve knowledge of the tricuspid valve and right atrioventricular junction (RAVJ) coupling, four-dimensional (4D) imaging is mandatory (3D + time). Based on multiphase cardiac-volume computed tomography (CT) and innovative 4D analysis, we proposed to assess dynamical features of tricuspid annulus (TA) in relation to the right ventricle (RV) and right atrial (RA) functions.METHODS:
Cardiac-volume CT data sets through time were obtained in 30 healthy patients (Male 57%, mean age 57 ± 11 years). Using an in-house software, 3D semi-automated delineation of 18 points around TA perimeter were defined through 10 cardiac phases within RR interval and used to calculate TA features such as 3D/2D areas, perimeters, 360°-diameters and vertical deformation. RV and RA inner contours were also delineated. Bi-dimensional parameters were compared with multiplanar reconstruction (MPR) measurements.RESULTS:
TA was elliptical in horizontal projection with a maximal eccentricity index (EcImax) of 0.58 ± 0.12; and saddle-shaped in vertical projection with a horn nearby the antero-septal commissure. This feature remained throughout the cardiac cycle, but TA was more planar and less circular in late diastole (TA-height 4.53 ± 1.06 mm, EcImax = 0.61 ± 0.14) when TA 3D area and perimeter reached a maximum of 7.05 ± 1.23 and 7.48 ± 0.93cm/m2, respectively. Correlations between minimal and maximal TA 3D areas and TA Projected 2D areas were excellent (r = 0.993 and r = 0.995, p < 0.001). TA 2D area measurements by MPR overestimated the projected values by 22 to 24%. Correlation between RV concentric strain and TA maximal diameter shortening was r = 0.452 (p = 0.01).CONCLUSIONS:
Cardiac-volume CT improves physiological knowledge of the relationships between the RAVJ components in healthy subjects.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Insuficiência da Valva Tricúspide
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Ecocardiografia Tridimensional
Limite:
Aged
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article