Cardiovascular manifestations of seronegative spondyloarthropathies represent an important clinical problem which has not been fully elucidated. Clinically significant cardiovascular symptoms are present in 10% of patients with ankylosing spondylitis (AS), usually in the case of long-standing disease. The following echocardiographic abnormalities have been reported in AS: ascending aortitis, aortic insufficiency (1-34%), mitral insufficiency (1-76%), mitral valve prolapse (5.7-10%), and diastolic dysfunction (20-50%). Abnormalities of the cardiac conduction system may develop in 1% to 33% of AS patients as a consequence of postinflammatory scarring of the myocardium. Cardiovascular diseases are the leading cause of death (36.2%) of patients with psoriatic arthritis (PsA). The risk of death in PsA is 1.3 times greater than in the general population. The following echocardiographic abnormalities can be seen in PsA: fibrinous pericarditis (18.2%), myocarditis (15.9%), and valvular disease (5.7%). Diastolic dysfunction in PsA correlates with the presence of articular lesions and duration of psoriasis. The importance of a thorough investigation of the cardiovascular system in patients with seronegative spondyloarthropathies is emphasized.