title: Hypotension and renal impairment during infusion of atrial natriuretic factor in liver cirrhosis with ascites.
abstract: Plasma immunoreactive atrial natriuretic factor (irANF) levels and the effects of alpha-human ANF (alpha-hANF) infusion were investigated in 7 patients with liver cirrhosis and ascites. Under basal conditions, supine blood pressure (BP) averaged 136/76 +/- 9/4 mm Hg (mean +/- SEM). Plasma irANF concentrations (124 +/- 33 pg/ml) were higher (p less than 0.01) than those in age-matched normal subjects (47 +/- 5 pg/ml). Plasma renin activity (PRA 5.9 +/- 2.2 ng/ml/h), aldosterone (18 +/- 7 ng/dl) and norepinephrine (NE, 66 +/- 5 ng/dl) levels were also elevated compared to the age-related normal range. Alpha-hANF infusion for 60 min at 0.036 micrograms/kg/min decreased the mean BP (-14%; p less than 0.05), increased PRA (+179%; p less than 0.05) and plasma NE (+24%; p less than 0.05). Glomerular filtration rate (GFR), effective renal plasma flow (ERPF), diuresis and natriuresis were not modified. A subsequent 60-min infusion of alpha-hANF at 0.067 micrograms/kg/min produced a marked fall in mean BP (-26%; p less than 0.001), hemoconcentration (hematocrit +6%; p less than 0.001) despite stable body fluid balance and a further increase in PRA (+350%, p less than 0.005). GFR and ERPF were severely reduced (-55 and -56%, respectively; p less than 0.001), while diuresis and natriuresis were not modified. Plasma aldosterone was unaltered during, but rose (+72%; p less than 0.01) after the cessation of alpha-hANF infusion. Variations in natriuresis during alpha-hANF infusion correlated positively with BP (r = 0.47; p less than 0.01), ERPF (r = 0.53; p less than 0.01) or GFR (r = 0.51; p less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Ospedale Italiano, Viganello, Switzerland.
authors.forename: C
authors.initials: C
authors.lastname: Ferrier
authors.forename: C
authors.initials: C
authors.lastname: Beretta-Piccoli
authors.forename: P
authors.initials: P
authors.lastname: Weidmann
authors.forename: M P
authors.initials: MP
authors.lastname: Gnädinger
authors.forename: S
authors.initials: S
authors.lastname: Shaw
authors.forename: K
authors.initials: K
authors.lastname: Suchecka-Rachon
authors.forename: H
authors.initials: H
authors.lastname: Saxenhofer
mesh_terms: D000328:Adult; D000368:Aged; D000450:Aldosterone / Q000097:blood; D001201:Ascites / Q000150:complications*; D009320:Atrial Natriuretic Factor / Q000097:blood / Q000494:pharmacology*; D001794:Blood Pressure / Q000187:drug effects; D002395:Catecholamines / Q000097:blood; D005260:Female; D006339:Heart Rate; D006801:Humans; D007022:Hypotension / Q000209:etiology* / Q000503:physiopathology*; D007668:Kidney / Q000503:physiopathology*; D007677:Kidney Function Tests; D008103:Liver Cirrhosis / Q000150:complications / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009638:Norepinephrine / Q000097:blood; D011187:Posture; D011863:Radioimmunoassay; D012083:Renin / Q000097:blood; D013997:Time Factors
chemical_list: D002395:Catecholamines; D000450:Aldosterone; D009320:Atrial Natriuretic Factor; D012083:Renin; D009638:Norepinephrine