In the article the paper presents the optimum parameters of echocardiographic assessment of the size of the aortic root. Interpretation of their indicators are not properly evaluated in practice, especially in terms of the forecast life-threatening aortic enlargement in such inherited disorders of connective tissue, as Marfan syndrome, Louis-Dietz and others. We give an explanation of the predictive value of Z-test as the best criterion of normal size aorta for the timely monitoring of these disorders. Variability of interpretation of functional and anatomical structure of the ascending department and KA, misunderstanding of optimum approaches to an assessment their true and calculation of the due sizes, can potentially lead in practice to the wrong interpretation of the studied data. Acceptance of more strict coordinated standardized definitions and an assessment of the sizes of structural elements of a root of an aorta important for modern practical recommendations and cardiological practice.
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