Which patients benefit from percutaneous mitral balloon valvuloplasty? Prevalvuloplasty and postvalvuloplasty variables that predict long-term outcome

Circulation
Igor F PalaciosPeter C Block

Abstract

Percutaneous mitral balloon valvuloplasty (PMV) results in good immediate results, particularly in patients with echocardiographic scores (Echo-Sc) < or =8. However, which variables relate to long-term outcome is unclear. We report the immediate and long-term clinical follow-up (mean, 4.2+/-3.7 years; range, 0.5 to 15) of 879 patients who underwent 939 PMV procedures. Patients were divided into 2 groups, Echo-Sc < or =8 (n=601) and Echo-Sc >8 (n=278). PMV resulted in an increase in mitral valve area from 1.0+/-0.3 to 2.0+/-0.6 cm2 in patients with Echo-Sc < or =8 and from 0.8+/-0.3 to 1.6+/-0.6 cm2 in patients with Echo-Sc >8 (P<0.0001). Although adverse events (death, mitral valve surgery, and redo PMV) were low within the first 5 years of follow-up, a progressive number of events occurred beyond this period. Nevertheless, survival (82% versus 57%) and event-free survival (38% versus 22%) at 12-year follow-up was greater in patients with Echo-Sc < or =8 (P<0.0001). Cox regression analysis identified post-PMV mitral regurgitation > or =3+, Echo-Sc >8, age, prior surgical commissurotomy, NYHA functional class IV, pre-PMV mitral regurgitation > or =2+, and higher post-PMV pulmonary artery pressure as independent predictors of com...Continue Reading

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