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Classic Procedure: The approach is the same as described earlier for open mitral valvotomy. The excision starts with an anterior incision on the anterior leaflet at 12o'clock position, 2mm distal to the annulus. The incision is extended. The anterior leaflet with the chordae and the tip of the papillary muscle are removed. If the posterior leaflet is calcified, it is also excised along with chordae and tips of papillary muscles. Over zealous excision and suturing may cause venticular rupture or damage to circumflex coronary arteiy. Valve size is assessed according to the type of valve selected by the surgeon. The valve can be sutured by a continuous suture technique or interrupted pledgetted mattress sutures using 2 '0' braided polyester sutures. The pledgets are usually placed on the atrial aspect or rarely on the ventricular aspect.
Define Factors affecting Absorption of Dietary Iron? There are mainly four factors that determine iron bioavailability absorption from the diet. These include: i) Form of ir
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Define the Toxicity of Vitamin B 12 ? Intake of 1000 μg vitamin B 12 has never been reported to have any side-effects. Similar large amounts have been used in some preparati
Why do few plants adapted to a dry environment open their stomata only at night? Throughout the day in dry habitats the guard cells become the stomata close and flaccid; concur
Q. Define Hepatic Triglyceride Synthesis? Fatty acid flux to the liver from adipose tissue appears to be an important determinant of hepatic triglyceride synthesis and VLDL sec
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Determine Guidelines to Lower Risk and Wise Use of Drugs? There can be no two views regarding the act that the management of many diseases require drug therapy. However, they m
What is an organ that belongs to more than one organ system? One answer is the pancreas. It belongs to both the endocrine and digestive systems. Another one is bone marrow. It
What is the basis of classifying 'cancer? Name and describe the different Categories of cancer. Mention any two approaches for cancer treatment. What is embryo culture? What is
How are glycosidic bonds formed? The anomeric hydroxyl group and a hydroxyl group of another sugar or some other compound can join together, splitting out water to form a glyco
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