This is a comprehensive description of the state of the art in prevent
ing occurrence and progress of thrombotic and thromboembolic diseases.
Anticoagulation with different heparin preparations and with oral ant
icoagulants as well as antiplatelet drugs, alone or in combination hav
e their particular indications in patients with arterial and venous ve
ssel diseases. Based upon recent clinical trials, recommendations are
given for the clinical practice.