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The presence of a small aortic annulus poses a considerable challenge in the management of patients with severe aortic stenosis, especially in elderly women, where it is a very frequent finding. The optimal approach for treating these patients remains controversial, and several surgical strategies such as aortic root enlargement, supra-annular stented prosthetic valves, stentless bioprosthesis, and sutureless bioprostheses have been proposed to improve valve hemodynamics and clinical outcomes. More recently, transcatheter aortic valve replacement has emerged as a valid alternative for the treatment of aortic stenosis and excellent valve hemodynamic results have been observed among patients with a small aortic annulus. The purpose of this review is to provide an overview of the current definition, prevalence, and clinical impact of small aortic annulus in patients with aortic stenosis, and evaluate the different therapeutic strategies currently available to improve valve hemodynamics and outcomes in this population.

Aortic Stenosis and Small Aortic Annulus