EARLY CORONARY-ARTERY BYPASS GRAFT THROMBOSIS IN A PATIENT WITH PROTEIN-S DEFICIENCY

A 59-year-old white mall underwent multiple coronary artery bypass gra fts (CABGs) on an emergency basis for severe stenosis of the left main , and occlusion of the right coronary, artery, One month after operati on recurrence of angina prompted a new diagnostic evaluation, Occlusio n of the grafts was detect ecl at angiography. Accurate hematological screening before reoperation showed decreased levels of protein S. One year after his second operation, the patient is asymptomatic on oral anticoagulant therapy. Tallium-201 scintigraphy shows normal myocardia l perfusion.