Open Heart Surgery
These  surgeries are done under alternative arrangements to continue oxygenated systemic blood supply, while the heart is operated on (Cardiopulmonary bypass).
Common open heart surgeries are:
Mitral stenosis
Open mitral valvotomy or commissurotomy 
Removal of thrombi  from atrium and  its appendage
Commissure incision, separation of  fused chordae
Splitting of underlying papillary muscle,  and debriding the valve  of  calcium.
Mitral regurgitation
Annuloplasty Reconstruction  of the valve leaflets and the annulus
Tricuspid regurgitation
With or without the aid of prosthetic  rings (carpentier ring).