Aorta-left renal vein fistula: hemodynamic monitoring and timing of operation.

The spontaneous rupture of an abdominal aortic aneurysm into an adjacent major venous structure is an unusual occurrence. A case of an aorta-left renal vein fistula is presented, and seven previously reported cases are reviewed. Hemodynamic monitoring as an integral part of patient care is discussed, with emphasis on the optimal timing of operative intervention.