RESUMEN
Mitral balloon valvuloplasty is the treatment of choice for severe mitral stenosis in young patients with a minimally calcified and pliable mitral valve. The Multi-Track system, devised by Bonhoeffer et al. in 1995, simplifies the Double Balloon technique. With this system, one of the balloons is a rapid exchange balloon, while the other has a conventional design, enabling both to be aligned in the mitral valve orifice over a single guide wire. The main advantage of such technique is lower cost, not only regarding the balloon, but also because they can be reused after resterilization with ethylene oxide. [Links et al., 2000] The study was designed to assess the efficacy of balloon valvuloplasty using multi-track technique for 50 cases of tight mitral stenosis [MVA 1.8 cm[2] in 82% of cases which is statistically significant and