Changes in plasma atrial natriuretic peptide--immunoreactivity in patients undergoing coronary artery bypass graft placements.
1987
Abstract Plasma atrial natriuretic peptide immunoreactivity (IrANP) was measured before, during, and after cardiopulmonary bypass for coronary artery bypass graft placement. Eight subjects scheduled for elective operation had in the premedicated pre-operative state slightly elevated IrANP compared to controls. Neither induction of anesthesia with a high dose narcotic/non-depolarising relaxant/diazepam technique nor cardiopulmonary bypass changed IrANP significantly. Mixed venous and arterial IrANP increased immediately after discontinuing bypass, and remained elevated 1 h later. Because ANPs affect peripheral resistance as well as urinary sodium loss, the post-bypass elevations in these peptides may contribute to cardiovascular and diuretic effects after cardiopulmonary bypass.
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