Active smoking is a well known risk factor for the development of athe
rosclerosis and in particular coronary heart disease and peripheral va
scular disease. The negative effects of active smoking demonstrated on
platelet function, the eicosanoid system and platelet thromboxane Ar
generation may contribute to the hemostatic imbalance reported. Recent
ly, the problem of passive smoking as a health risk has been widely di
scussed. Detailed information on the role of passive smoking on hemost
atic parameters, however, is still very limited. As far as present kno
wledge is concerned, platelet activation seems to be significantly inv
olved in the deleterious vascular effects of passive smoking as well.