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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.
Describe the various types of RNA? Types of RNA : There are three different types of RNA, all formed by transcription from DNA: (1) Messenger RNA (mRNA) is a single unc
1) What is the effect of increase temperature on a non enzyme catalyzed reaction? 2) What are the effects of increased temperature on an enzyme catalyzed reaction?
Tooth associated with Persistent apical periodontitis Functional retention of the tooth : persistent lesion while remain asymptomatic function for an extended period of time .
You have learnt about the epidemiology, etiology and pathogenesis of acute rheumatic fever. Revised Jones criteria, which have major and minor criteria, are helping to diagnosis of
what is a cell?
What do ATP and ADP mean? What are the roles of these molecules for the cellular energetic metabolism? ATP is an abbreviation of adenosine triphosphate, a molecule made of aden
Suppose that a portion of double-stranded DNA in the middle of a large gene is being transcribed by an RNA polymerase. As the polymerase moves through the sequence of six bases sho
What is meant by suction force of the plant cell? Does the suction force facilitate or make difficult the entrance of water in the cell? Ans) The suction force (SF) is the osmot
What is hemodialysis? Hemodialysis is the artificial blood filtration made by exact machines in substitution of the kidneys. Hemodialysis may be essential in patients suffering
Microorganisms that survived the preservation and shortage treatment applied to the food Different microorganisms have different susceptibility to the preservative methods empl
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