THE ATRIAL-NATRIURETIC-PEPTIDE RECEPTOR ANTAGONIST HS-142-1 IMPROVES CARDIOVASCULAR FILLING AND MEAN ARTERIAL-PRESSURE IN A HYPERDYNAMIC OVINE MODEL OF SEPSIS
F. Hinder et al., THE ATRIAL-NATRIURETIC-PEPTIDE RECEPTOR ANTAGONIST HS-142-1 IMPROVES CARDIOVASCULAR FILLING AND MEAN ARTERIAL-PRESSURE IN A HYPERDYNAMIC OVINE MODEL OF SEPSIS, Critical care medicine, 25(5), 1997, pp. 820-826
Objective: To test whether systemic vascular resistance and mean arter
ial pressure increase during the administration of the atrial natriure
tic peptide antagonist, HS 142-1, in ovine experimental hyperdynamic s
epsis. Design: Prospective trial. Setting: Research laboratory at a la
rge university medical center. Subjects: Chronically instrumented Meri
no breed ewes (n = 14). Interventions: Continuous infusion of Pseudomo
nas aeruginosa (2.5 x 10(6) colony-forming units/min) for the experime
ntal period of 48 hrs, One group (HS 142-1) received a continuous infu
sion of HS 142-1 (3 mg/kg/hr) from 40 to 48 hrs; the remaining sheep (
''control'') were given the vehicle sodium chloride 0.9%, Measurements
and Main Results: All sheep developed a hyperdynamic cardiovascular r
esponse by 40 hrs that was characterized by low values of systemic vas
cular resistance index (p < .05) and mean arterial pressure (p < .05),
and an increased cardiac index (p < .05), HS 142-1 increased cardiac
filling pressures (p < .05) without apparent effects on fluid balance,
and was associated with a significantly (p < .05) higher mean arteria
l pressure than was found in the control group at 44 and 48 hrs, HS 14
2-1 did not change systemic vascular resistance index, At 44 and 48 hr
s, cardiac index values were found to have significantly (p < .05) inc
reased in the animals receiving HS 142-1, when these data were compare
d with cardiac output values at 40 hrs. Conclusion: HS 142-1 increases
cardiac filling pressures and maintains mean arterial pressure in hyp
erdynamic sepsis without reversal of sepsis induced vasodilation.