Valvuloplasty in different valvular stenosis

Consider one of the indications of balloon valvuloplasty in different valvular stenosis: tricuspid valve stenosis, pulmonary valve stenosis, mitral valve stenosis, and aortic valve stenosis. There are some occurrences where the potential risks outweigh the potential benefits. Pick one of the indications and discuss why the risks outweigh its benefits in this particular indication.