Overview BNP (Nesiritide) vs. Placebo to Protect Kidney Function in Patients Undergoing Heart Bypass Surgery. Status: Completed Trial end date: 2007-10-01 Target enrollment: Participant gender: Summary Use of BNP (nesiritide) vs placebo to help protect kidney function in patients undergoing heart bypass surgery. Phase: Phase 1/Phase 2 Details Lead Sponsor: Mayo ClinicCollaborator: Scios, Inc.Treatments: Natriuretic Peptide, Brain