الفهرس 
The Mitral ValveOnly 14 pages are availabe for public view
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Abstract
Conventional mitral valve replacement MVR with complete excision of native valve apparatus has been associated with postoperative low output syndrome and a higher mortality. Maintenance of papillary annular continuity is important for ventricular geometry and function. The early and late hemodynamic benefits of preserving the mitral subvalvular apparatus during mitral valve replacement (MVR) have been demonstrated in several studies. The aim of this work is to evaluate left ventricular function after mitral valve replacement with preservation of posterior leaflet of mitral valve or total preservation of mitral valve tissue at rest and during peak exercise using dobutamine stress echocardiography (DSE). In this study, fifty patients undergoing isolated surgical correction of mitral insufficiency were prospectively randomized to either total or partial chordal sparing mitral valve replacement. Complete data from these 50 patients were available for analysis. Of these individuals, 25 had complete preservation of all chordal structures (C-MVR) (group I), and 25 had preservation of the posterior leaflet only (P-MVR) (group II). Summary& Conclusion and Recommendation 171 Left ventricular (LV) function was evaluated utilizing echocardiography preoperatively and postoperatively (3-6 month) at rest and during peak exercise using dobutamine stress echocardiography (DSE) to measure LVEDD (Left Ventricular End Diastolic Diameter), LVESD (Left Ventricular End Systolic Diameter), LVEF (Left Ventricular Ejection Fraction), LVFS (Left Ventricular Fraction Shortening), LAD (Left Atrial Diameter), CI (Cardiac Index), Co (Cardiac output). Effective Orifice Area (EOA), Maximum Pressure Gradient (Max PG), Mean Pressure Gradient (Mean PG).Preoperatively, there is no significant difference between both examined groups in age, sex, NYHA and echocardiographically. The aortic cross clamp time, total bypass time, was significantly longer in group I (C-MVR) compared to group II (P-MVR) as P < 0.001. Mechanical ventilation time, ICU stay time in hours, was significant longer in group I in relation to group II. Regarding need for inotropes and need for vasodilators intraoperative and in ICU, there was no significant . The total hospital stay, there was no significant difference between both examined groups. In patients of (group I) (C-MVR), regarding LVEF (Left Ventricular Ejection Fraction) and LVFS (Left Ventricular Fraction.