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Pulmonary edema in renal transplant patients.

A syndrome heralded by fever, deterioration of graft function, respiratory failure accompanied by pulmonary infiltrates has been termed "transplant lung." We hemodynamically studied eight such patients. At the height of their illness, pulmonary artery wedge pressure (PAWP) was elevated to 19.3 +/- 2.6 mm Hg along with mean pulmonary artery pressure (PAP) of 35.0 +/- 3.8 mm Hg in presence of increased cardiac index (CI) of 4.9 +/- 0.9 L.m2.min. Pathophysiology of pulmonary edema appears to include high left ventricular filling pressures, pulmonary hypertension, alterations of oncotic hydrostatic gradient, and increased cardiac output. A partial reversal of pulmonary hypertension was observed with dialysis or diuresis. Our data suggest incipient renal failure and fluid accumulation as the etiology of hemodynamic pulmonary edema in "transplant lung."