Compared with CR patients , RR patients were younger ( @ versus @ years ; p = @ ) and more likely to present with larger root diameter ( @ cm versus @ cm ; p < @ ) , Marfan syndrome ( @ % versus @ % ; p < @ ) , aortic insufficiency ( @ % versus @ % ; p < @ ) , and hypotension , shock , or tamponade ( @ % versus @ % ; p = @ ) .