Methods Under cardiopulmonary bypass, sonomicrometry crystals were implanted in the
aortic root and valve of eight sheep. Crystals were sutured at each commissure (n= 3), the …

Materials and methods Using autopsied specimens of normal hearts, the morphology of the
attachment of the leaflets, the interleaflet triangles and the circular ventriculo-arterial junction …

Methods and results Previous studies using cine fluoroscopy and sonomicrometry have
reported a 5-7% expansion of the aortic root during ventricular contraction, prior to aortic …

Objective: Valve-sparing surgery can be used in patients with dilated aortic roots and aortic
insufficiency (AI) but has not become a common practice, in part because the spared valve …

Methods High-resolution, 3D sonomicrometry (200 Hz) was applied in an acute sheep
model. Twelve crystals were implanted in eight sheep at each base (n= 3), commissure (n …

Background. The durability of aortic valve-sparing procedures is negatively affected by
increased leaflet stress in the absence of normally shaped sinuses of Valsalva. We …

OBJECTIVE: Percutaneous aortic valve replacement is an emerging therapy for selected
patients with severe aortic stenosis. Preoperative imaging of the aortic root facilitates sizing …

Aortic valve orifice area was dynamically measured in anesthetized dogs with a new
measuring system involving electromagnetic induction. This system permits us real-time …

Background—The surgical approach to aortic root aneurysm and/or dissection remains
controversial. The use of valve-sparing operations, which are thought to have many …

Background To enhance the reproducibility of aortic valve–sparing reimplantation and
annuloplasty, we analyzed the topographic relationship between the ventriculoaortic …