منابع مشابه
Acute failure of artificial heart valves.
acute myocardial infarctions has shown that 160 mg aspirin daily reduces mortality after five weeks by a fifth.9 Despite the lack of evidence from clinical trials many patients with transient ischaemic attack and stroke are treated with 75 mg daily (a dose enshrined in the current British National Formulary), with the risk that they may be receiving an inadequate dose, albeit a safe one. On the...
متن کاملArtificial Heart Valves
The cardiovascular system is a closed circulatory system that ensures blood flow through the human body. Blood circulates through two systems; the first is responsible for pushing blood from the heart to the lungs to capture oxygen, and the second is responsible for distributing oxygenated blood to body organs. This system is composed of a double pump with branched tubes that leads blood from t...
متن کاملFluid mechanics of artificial heart valves.
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...
متن کاملCfd Simulation of Blood Flow through Artificial Heart Valves
Artificial valve replacement is a common procedure in case of heart valve disorders treatment. The main task of this prosthesis is to generate blood flow similar to flow generated by natural, human valve. Velocity distribution depends mainly on the geometry of the valve. That is why it should be analysed and modified in case to obtain the best results. The objective of this study was to numeric...
متن کامل3D3C Velocity Measurements Downstream of Artificial Heart Valves
Three-dimensional three-component (3D3C) velocity measurements were made in the flows surrounding a mechanical valve and a silicone polymer valve. Primary three-dimensional flow features were identified in the instantaneous and ensemble-averaged flows surrounding both valves.
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ژورنال
عنوان ژورنال: BMJ
سال: 1988
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.297.6661.1473-d