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Stentless Devices : A bioprosthesis mounted on a stent reduces the effective orifice area (EOA). The newer version (third generation) stentless gluteraldehyde preserved porcine valves are now available for clinical use. The
commonly used one is Toronto stentless prosthetic valve (SPV) made by St. Jude Medical. The other type is Medtronic free style porcine bioprosthesis. Both are preserved in gluteraldehyde. It can be implanted in the sub-coronary position in the aorta or as a full aortic root replacement with reimplantation of corollary arteries. Usually the cusps remain free of calcium at six years and 85 per cent have freedom from structural deterioration at the end of nine years.
When glucagon binds its receptor there is an increase in the second messenger, cAMP. cAMP levels can be decrease by which of the following enzymes? -adenylate cyclase -PDK1
List the types of Gellan gum. The three types of gellan gums are: High acetyl gellan (partially deacetylated) Low acetyl gellan (highly deacetylated) High cl
Mrs. TT seventy three-year old has a long history of chronic obstructive pulmonary disease (COPD). She came to the medical ward as shortness of breath, wheezing and a cough for the
How are ecological interactions classified? Ecological interactions are divided as intraspecific or interspecific interactions and as harmonious or inharmonious interactions.
True or false? It would be difficult to assess whether the drug-susceptible or drug-resistant phenotype in a population of Mycobacterium tuberculosis was more fit in an environment
What is the role of mineral salts in the creation of electric tension (voltage) at the cellular level? The electric activity of the cell, for instance, in neurons, depends on
Q. What is an instance of a hypothesis which may explicate why there is not a big representation of the class Reptilia found in Polar Regions? Beings of the class Reptilia are
Rabies Rabies is highly prevalent in Africa, India, Asia and parts of Latin America, but the risk to travelers is low. Pre-exposure immunizationagainst rabies is recommended f
Q. Why is meiosis significant for the maintenance of the normal quantity of chromosomes of a species with sexual reproduction? A reduction to a half of the maximum normal quant
Cystic fibrosis (CF) is caused by a variety of mutations in the CFTR gene. Imagine you have identified a new single-base pair mutation (A→T) in an exon of the CFTR gene. You wish t
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