1. Artificial heart valves have been in use for over five decades to replace diseased heart valves. Since the first heart valve replacement performed with a caged-ball valve, more than 50 valve designs have been developed, differing principally in valve geometry, number of leaflets and material. To date, all artificial heart valves are plagued with complications associated with haemolysis, coag...

Background: Heart valve disease gradually increases the pressure in the heart chambers and impairs heart pumping. It influences on quality of life due to low output, disability, fear, amnesia, anxiety, and depression. Although most of signs and symptoms in patients with heart valve diseases may significantly decrease after valve replacement surgery, there is limited information about the impact...

Our experience with homograft replacement of the aortic valve now includes 175 patients operated on over a period of almost three years, and we have come to aceept this method as the best surgical treatment for aortic incompetence and for calcific aortic stenosis. As others continue to use a ball valve prosthesis, it is important to analyse the results with the homograft valve, paying particula...

blunt injury to the chest can affect any one or all components of the chest wall and thoracic cavity. the clinical presentation of patients with blunt chest trauma varies widely and ranges from minor reports of pain to florid shock. traumatic tricuspid valve regurgitation is a rare cardiovascular complication of blunt chest trauma. tricuspid valve regurgitation is usually begotten by disorders ...

Rolling bearings are high precision, low cost machine elements, used in all kinds of rotating machinery. Simulations of rolling bearings bring increased understanding of their dynamic behaviour, and shortens product development time. A rolling bearing simulation model called BEAST (BEAring Simulation Tool), has been developed by SKF. Due to the high demands on contact geometry description and c...