Statistical analysis will be done with central tendency and dispersion measures according to the distribution of the variables. We will use the hypothesis testing according to the normality of data with T-test for independent groups or Mann-Whitney test for continuous variables, whereas for categorical variables X2 test or Fisher exact test when the observed frequency is <5 will be used. The free event will be analyzed with Kaplan Meier curves. To determine the correlation of performers (blind and independent) of angiography and echocardiography we will use the Kappa index.