BACKGROUND Management of an adult patient with aortic coarctation and an associated cardiac pathology poses a great surgical challenge since there are no standard guidelines for the therapy of such complex pathology. Debate exists not only on which lesion should be corrected first, but also upon the type and timing of the procedure. Surgery can be one- or two-staged. Both of these strategies ar...

Exploding gas-filled balloons are common chemistry demonstrations. They also provide an entertaining and educational means to experimentally verify nonlinear acoustical theory as described by the Earnshaw solution to the lossless Burgers equation and weak-shock theory. This article describes the theory, the demonstration, and the results of a propagation experiment carried out to provide typica...

O ver the past 4 years, transcatheter aortic valve replacement (TAVR) has transformed the cardiac care of patients in the United States with severe aortic stenosis (SAS). In September 2011, a balloon-expandable prosthesis (Sapien, Edwards Lifesciences, Irvine, California) received U.S. Food and Drug Administration (FDA) approval for the treatment of inoperable patients on the basis of a randomi...

Charge is observed in clouds of all forms, which may influence their development and properties. In-cloud charge measurements require a wide dynamic range, extending from charge in aerosols and dusts to that present in thunderstorms. Unexpectedly large charge densities (>200 pC m-3) have recently been detected in layer clouds using balloon-carried linear electrometers. These, however, lead to i...

This report presents a case of a patient with a huge hepatocellular carcinoma in the right lobe of the liver with an extensive portal venous tumor thrombus extending into the main portal trunk and left portal branch. The patient underwent extended right hemihepatectomy with tumor thrombectomy with direct extraction from an opening of the ventral wall of the right portal vein and using a balloon...

Product innovation success has very much to do with the development of models ormetaphors that are able to guide actors. One can observe two traditions in thisregard: rational and non-rational models. Apparently in the former the model, suchas “development funnel”, is regarded as a mechanism and rigid applicable, picturinginnovation as an orderly, goal-oriented, value-neutral, and systematic pr...

Dilation of blood vessels transluminally was demonstrated by Dr Andreas Gruntzig in 1978. In 1982, Kan demonstrated that congenitally stenosed valve can be dilated with the use of cylindrical balloon and opened up new vistas in the non-surgical treatment of congenital heart lesions. Rapid progress has been now made in (1) Understanding of mechanism of success or failure of balloon dilation (2) ...

DEFINITION The extended entity-relationship (EER) model is a language for definition of structuring (and functionality) of database or information systems. It uses inductive development of structuring. Basic attributes are assigned to base data types. Complex attributes can be constructed by applying constructors such as tuple, list or set constructors to attributes that have already been const...

A visualization principle for MR-guided vascular interventions based on the concerted use of two contrast agents is introduced. The first contrast agent, consisting of small paramagnetic iron oxide particles, was administered intravenously to shorten T(1), and even more so T *(2), of the blood for extended time periods. The second agent, a monomeric gadolinium complex, was added to a solution i...