This paper is a commentary on the experimental observation observations of Bensimon et al. [1] of convection of a binary fluid mixture in a fluid annulus. They observed a convective pattern that is time periodic, but with non-zero amplitude confined to a stationary sector of the annulus. The symmetry properties of this state are paradoxical. There is no subgroup of the spatio-temporal symmetry ...

BACKGROUND AND OBJECTIVES Right ventricle (RV) remodeling can determine tricuspid valve (TV) geometry and the severity of functional tricuspid regurgitation (TR). SUBJECTS AND METHODS In 53 patients with various degrees of functional TR and in sinus rhythm, RV and TV geometries were analyzed using real-time 3-dimensional echocardiography, including tenting angles of 3 leaflets, septal-lateral...

BACKGROUND The objective was to evaluate the effects of aortic annulus size on valve hemodynamics and clinical outcomes in those patients included in the Placement of Aortic Transcatheter Valves (PARTNER) randomized controlled trial cohort A and the nonrandomized continued access cohort. METHODS AND RESULTS Patients included the randomized controlled trial (n=574) and nonrandomized continued ...

The complex structure of the annulus fibrosus is strongly related to its mechanical properties. Recent work showed that it is possible to observe the relative movement of fibre bundles in loaded cow tail annulus; the aim of this work was to describe and quantify annulus fibrosus micromechanics in degenerated human disc, and compare it with cow tail annulus, an animal model often used in the lit...

BACKGROUND Transcatheter aortic valve implantation (TAVI) is a well-established treatment for patients with severe aortic valve stenosis. This procedure requires pre-operative planning by assessment of aortic dimensions on CT Angiography (CTA). It is well-known that the aortic root dimensions vary over the heart cycle. However, sizing is commonly performed at either mid-systole or end-diastole ...