This study describes the initial experience of the Instituto Nacional de Cardiología "Ignacio Chávez", with percutaneous aortic balloon valvuloplasty for calcified aortic valve stenosis in adults. Five patients, 4 males and a female (mean age 54 +/- 7 years), were included. All of them had poor ventricular function, and were not surgical candidates. Although it is in fact a small group, the results are promising, with a success rate of 80%, and without mortality. In only one case, the transvalvular gradient could not be modified.