MEDLINE/PubMed Journal Browser Search

Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

Title: Effects of posture and positive airway pressure on plasma atrial natriuretic peptide and renal urodilatin excretion.
Author: Heringlake M, Klaus S, Bahlmann L, Sehested J, Pagel H, Schmucker P.
Journal: Clin Nephrol; 2001 Nov; 56(5):364-9. PubMed ID: 11758006.
Abstract:
AIMS: To determine whether a coupling of plasma atrial natriuretic peptide (ANP) and renal excretion of urodilatin (U(URO)V)--recently observed during supraphysiological concentrations of ANP--may also be detected during moderate changes in ANP levels, i.e. if ANP is increased by supine positioning and decreased by applying continuous positive airway pressure (CPAP). MATERIAL AND METHODS: We investigated 10 healthy male volunteers, orally hydrated with 200 ml water/h, in a randomized crossover study for periods of 1 hour following 2 protocols. Protocol 1: sitting and supine position. Protocol 2: sitting with and without a CPAP of 8 cm H2O. RESULTS: ANP increased ongoing from the sitting to the supine position (SIT-1: 13.2 +/- 4.7; SUP: 27.9 +/- 21.9 pg x ml(-1); p < 0.01) during protocol 1 and decreased after the onset of CPAP in seated subjects (SIT-2: 16.9 +/- 7.9; SIT-CPAP: 13.9 +/- 6.5 pg x ml(-1); p < 0.05) during protocol 2. U(URO)V decreased slightly, but not significantly, during protocol I (SIT-1: 63.9 +/- 21.7; SUP: 49.9 +/- 13.2 fmol x min(-1)) and remained unchanged after institution of CPAP in the sitting position (SIT-2: 68.5 +/- 25.2; SIT-CPAP: 68.5 +/- 50.2 fmol x min(-1)). Correlation analysis revealed no relationship between plasma ANP and U(URO)V. CONCLUSIONS: Moderate variations in the levels of ANP in water-loaded volunteers do not induce parallel changes in the urinary excretion of urodilatin.

[Abstract] [Full Text] [Related] [New Search]