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.