“…The effectiveness of balloon valvuloplasty with regard to pressure reduction of the left ventricle has been reported by several authors in the past [1][2][3][4]6,7,[10][11][12][13][14]; however, most of those studies are single center experiences or include relatively small numbers of patients [2][3][4]6,7,12,14]. Keeping in mind that indications for and technical performance of balloon valvuloplasty are not standardized and can differ considerably between institutions and even within centers [15], it is remarkable that in the present study the results are to a great extent comparable to those reported from single center studies [2,4,7].…”