Mitral Stenosis surgical indications
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Hemodynamic and Clinical Outcomes
- Results of the commissurotomy should be assessed with hemodynamics and echocardiography
- If second inflation is needed mitral regurgitation should be assessed
- In general increasing valve area to greater than 1 cm2/m2 is an acceptable result
- Usually the valve area doubles and the pulmonary pressures degrease immediately
- 5 year survival is in the 90% range
Factors favouring successful percutaneous mitral valvuloplasty
Mitral stenosis is amenable to percutaneous mitral valvuloplasty if the echocardiography demonstrates :
- Thickening confined to valve tips
- Good mobility of Anterior mitral valve leaflet
- Little chordal involvement
- not more than trivial mitral regurgitation
- no left atrial thrombus
- no commissural calcification.
Wilkins score
A scoring system exists to grade the morphological changes in the mitral valve during assessment with echocardiography. This takes into account 4 characteristics: leaflet mobility, leaflet thickening, valve calcification and involvement of the subvalvular apparatus. The involvement is graded from 0-4. A total score of more than 8 is predictive of a low success post percutaneous mitral valvuloplasty.[1]
References
- ↑ Wilkins GT, Weyman AE, Abascal VM, Block PC, Palacios IF. Percutaneous balloon dilatation of the mitral valve: an analysis of echocardiographic variables related to outcome and the mechanism of dilatation. Br Heart J. 1988;60:299–308. doi: 10.1136/hrt.60.4.299