Purpose: To determine the prevalence of proximal aortic abnormalities in patients with Ehlers-Danlos syndrome (EDS). Methods: In a prospective cohort study, aortic measurements by two-dimensional echocardiography were performed on consecutive EDS patients. Results: Twenty-eight percent (20 of 71) had aortic root dilation (ARD) (Ͼ ϩ2 SD above population based norms).
Key Words: Ehlers-Danlos, echocardiogram, aorta, aortic dilationThe Ehlers-Danlos syndromes (EDS) are a genetically, biochemically, and clinically diverse group of heritable connective tissue disorders having joint laxity and dermal features in common. 1-3 Prior classifications of EDS have included up to 11 disorders. Recently a simplified classification came into use that takes into account increasing clinical experience and advances in our understanding of the molecular pathogenesis of these disorders. Table 1 provides the new Villefranche classification and its relationship to the most recent prior classification in 1988. 2,4 Of these, the classical (EDS types I, II), hypermobile (EDS type III), and vascular (EDS type IV) types are by far the most common.A variety of cardiovascular complications have been associated with EDS, including mitral valve prolapse, rupture of medium-sized arteries, varicose veins, easy bruising, dilation and/or rupture of the aortic sinus and rupture of the aorta. 1,3,[5][6][7][8][9][10][11][12] Pepin et al. 13 recently reported the prevalence of cardiovascular complications in a large cohort of patients with vascular EDS; these primarily involve rupture or dissection of medium-sized arteries and the descending aorta. The prevalence of cardiovascular complications in the classical and hypermobile forms are unknown. We began to perform baseline echocardiographic evaluations on all EDS patients seen in our clinics after having identified a few cases of EDS with aortic root dilation, some of whom had complications. 12 The data indicate that the prevalence of aortic root dilation in these two forms of EDS is higher than previously suspected and that longitudinal follow-up of a large cohort of EDS patients will be necessary to determine whether or to what extent these patients are at risk for serious complications such as aortic rupture, valvular insufficiency, or dissection.