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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.
The Phenomenon of acid rain was first introduced by Rober Angus smith in 1852. Is means presence of excessive acids in rain water? Acid rain is a form of precipitation (rain, sn
Snakes Non-poisonous snakes can be brought into the classroom for observation. The diagram shows how a safe cage can be made for keeping a snake. The bottom should be covered w
What is Protein Synthesis? Protein Synthesis : Protein synthesis begins in the nucleus, with the formation of mRNA from a DNA template through transcription. The function of
Define beriefly about the Phytoestrogens? You may be aware of the surging interest in phytoestrogens (PE) especially in connection with osteoporosis. This section briefly discu
Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Blood plasma levels of Glucose. B. Blood plasma le
Ultrasonic and sonic vibrations Cells of all types can be destructed by intense sonic and ultrasonic vibrations generated by magnetostrictive oscillations or peizo electric cry
Quantitative Methods - Therapeutic diets Quantitative Methods: These are often essential for constructing Lherapeutic diets. The two ways by which this could be done are as
Testing for urine sugars is not recommended for either diagnosis or monitoring of patients with diabetes. This is because a urine sugar is not a reliable test. When no facilities a
Explain Materials for Root End Filling- Amalgam a) Its radiopacity is the better than any other REF materials b) Greatest amount of leakage! c) Corrosion, and significant
explain polymorphism in lysosomes
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