The Crystal City Guidelines for an algorithm for the management of potential heart donors (19). CVP, central venous pressure; HCT, hematocrit; Hgb, hemoglobin; MAP, mean arterial pressure; LVEF, left ventricular ejection fraction; T3, triiodothyronine; SVR, systemic vascular resistance; BG, blood glucose; PCWP, pulmonary capillary wedge pressure.