Limitations
This study presents numerous limitations: it is a single center retrospective study and has all the limitations related to this model of analysis, the lack of echocardiography details about the Color Doppler measures (vena contracta and jet width), the mechanism of aortic regurgitation and the grade of STJ remodeling during surgery. For these reasons further studies with larger number of patients and more echocardiographic features are necessary to better understand the real nature and evolution of this disease.