Marfan's syndrome in its complete and incomplete forms takes very often a course 
with cardiac complications, predetermining the fate of such patients. The 
incomplete forms often present difficulties for the timely etiological 
elucidation of the cardiac changes leading to a retardation in the prescribing a 
rational regime to the patients and timeliness of the operation treatment. The 
authors' team own observations are reported on 10 patients with Marfan's 
syndrome, one with complete form and nine--incomplete forms, all of them with 
cardiac complications; two with mitral insufficiency, three with aortic 
insufficiency, four with aortic and mitral insufficiency and one with aortic, 
mitral and tricuspidal insufficiency; seven of the patients had aneurysm at the 
initial part of the aorta, manifested to various degrees and one--dysplasia of 
aorta. Rhythm disturbances were found in one of the patients. One of the 
patients underwent operation--prosthesis of mitral and aortic valve--with good 
results. Three of them died of severe total cardiac insufficiency.