Table 1. Patient Demographic and Surgical Characteristics^*

* At surgery performed during the study. † Acquired allergies included allergies to penicillin and other antibiotics, contrast dye, bee or wasp poison, pollen, plaster, and the sun. ‡ Other procedures included heart transplantation, ascending aorta replacement, and mitral valvuloplasty.

CPB = cardiopulmonary bypass; KIU = kallikrein inactivator units.