Immediate and late results of percutaneous mitral valve repair in patients with mitral stenosis.
BACKGROUND
The analysis of immediate and long-term results of mitral valvoplasty by balloon catheter (MVRBC) are still lacking in literature, mainly in the national context.


OBJECTIVE
To assess the immediate and late results of patients submitted to mitral valve repair by balloon catheter.


METHODS
A total of 330 consecutive patients were followed-up by 47 +/- 36 months (up to 126 months). Univariate and multivariate analyses assessed the factors associated with the success of the procedure, restenosis and late events (death or necessity of new intervention on mitral valve). Kaplan-Meier method estimated survival without events.


RESULTS
The procedure was successful in 305 cases (92.4%). The mitral valve anatomy was the main predictor for immediate success for the procedure. During the procedure, restenosis occurred in 77 (23.3%) patients and was associated with smaller mitral valve area and with larger calcification before the process. In a mean period of 38 +/- 26-month follow-up, 67 events occurred. The probability of survival without events was of 95% in one year, 75% in five years and 61% in ten years. The predictors of survival without events were: age, echocardiography score and immediate result of the procedure.


CONCLUSIONS
Mitral valve repair by balloon catheter is an effective procedure, as 60% patients did not present events after the follow-up. The anatomical condition of the mitral valve and the patient's age were the best predictors of survival without events, and should be taken into account when selecting patients for the mentioned procedure.
Cardoso
Luiz Francisco
LF
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, Brazil. lcardoso@cardiol.br
Ayres
Carlos Vinetou
CV
Bento
André Moreira
AM
Tarasoutchi
Flávio
F
Vieira
Marcelo Luiz
ML
Grinberg
Max
M
D002404:Catheterization / Q000379:methods*; D023903:Coronary Restenosis / Q000209:etiology; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008946:Mitral Valve Stenosis / Q000000981:diagnostic imaging / Q000628:therapy*; D016896:Treatment Outcome; D014463:Ultrasonography