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Q. Pathology of aortic regurgitation?
In Post Inflammatory situations scarring and retraction of valve cusps lead to aortic regurgitation. Varying degrees of commissural fusion leads to incomplete opening and closing in rheumatic heart disease.
15 - 20 per cent of bicuspid valve patients will have significant aortic regurgitation. In Marfan's Syndrome due to abnormalities in fibrillin and in cystic medial necrosis due to abnormalities in elastin aortic wall becomes weak, stretched out and does not support commissures leading to incomplete central closure. In inflammatory aortitis situations like syphilis and ankylosing spondylitis, medial inflammation and scarring cause root dilatation. In SLE with anti cardiolipin antibodies, Libman-Sacks endocarditis and in rheumatoid arthritis, rheumatoid nodules cause scarring of valve cusps.
Excluding the effects of cardiac output and hormones, describe the other factors that may affect blood pressure and blood flow in a middle-aged man who is exercising in an aerobics
In rats, the gene pigment (P) is dominant to no pigment (p). The gene for black (B) is dominant to the gene for cream (b). If a pigment gene (P) is absent, genes B and b are inoper
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Name three sources of biofuel
As with food crops, the "discovery, domestication and cultivation" of ornamental plants have a long history. There is indication that lilies were cultivated in China for both medi
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what are the excretory organs of birds
List a few important uses of food hydrocolloids. A few important uses of food hydrocolloids are: to increase viscosity and to stabilize food products. Its other uses include u
Transmissible gastroenteritis of swine The disease, first reported from the USA in 1964, is caused by antigenic group 1 mamalian coronavirus, a member of genus Coronavirus of
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