not good because of the recurrent inflammatory disorder. You cannot preserve. Dr Hraska: Okay. Is mechanical aortic valve replacement only, without root replacement, justifiable when the long-term future of the neoaortic root is unclear? Can you comment on that? Dr Alsoufi: This is definitely a good question, and I am already trying to get echocardiograms in those patients who had the aortic va...

ROSS, an object-oriented language that has evolved over the last two years as part of the knowledge-based simulation research at Rand [1,3,6,7,8,91. We describe a program called SWIRL designed for simulating military air battles between offensive and defensive forces. SWIRL is written in an object-oriented language (ROSS) where the knowledge base consists of a set of objects and their In the fo...

OBJECTIVES The Ross procedure is the preferred aortic valve replacement (AVR) choice in small children. Nonetheless, it is a complicated surgery and there are concerns that subsequent cardiac reoperations are exceptionally complex and associated with high morbidity and mortality. We examine the surgical spectrum and report outcomes of cardiac reoperations in patients who had undergone the Ross ...

The concentration and size distribution of microparticles are measured on the Ross Ice Shelf at three sites : Q-13, base camp, and J-9. Results from the analysis of 2 611 samples representing the 100 m core from site Q-13 are presented. Increasing particle concentrations since 1800 are interpreted as a reflection of the gradual movement of the Q-13 drill site northward toward the Ross Sea under...

with the writer who immediately allowed his name to be published, as may be seen by a reference to our columns (May 1911, p. 187). This letter has long been lost, but at the time we stated and we still believe that it contained nothing beyond a statement to the effect that the writer should give his name. This having been done, we did not think it necessary to publish the letter itself, and not...

The quest for a perfect heart valve substitute has been going on for half a century. In 1960, Lower et al1 described the feasibility of replacing the aortic valve of dogs with the native pulmonary valve. In 1967, Ross performed this procedure in humans.2 Ross transferred the pulmonary valve into the aortic root with the same technique used to implant aortic valve homograft3 (ie, the pulmonary s...

BACKGROUND AND OBJECTIVES Ross procedure is one of the surgical procedures for correction of severe congenital aortic insufficiency. Intraoperative transesophageal echocardiography is essential for optimal surgical evaluation. Furthermore, it is able to assess the blood volume profile and the need for administration of vasoactive drugs during surgery. CASE REPORT This is a 15-year old teenage...

OBJECTIVE Given the shortage of small-sized cryopreserved homografts for right ventricle (RV) to pulmonary artery (PA) reconstructions, more readily available larger-sized homografts can be used after size reduction by bicuspidalization. The aim of our study was to determine and compare function over time of standard and bicuspidalized homografts in infants younger than 12 months, including pat...