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  • Title: Atrial natriuretic peptide in non-modulating essential hypertension.
    Author: Luparini RL, Ferri C, Santucci A, Balsano F.
    Journal: Hypertension; 1993 Jun; 21(6 Pt 1):803-9. PubMed ID: 8500861.
    Abstract:
    To evaluate the atrial natriuretic peptide response to angiotensin II (Ang II) infusion in non-modulating hypertension, we studied 31 men with essential hypertension. These patients were subdivided into groups of low renin patients (n = 8), non-modulators (n = 11), and modulators (n = 12) according to their renin profile and ability to modulate renin and aldosterone responses to a graded infusion of Ang II (1.0 and 3.0 ng/kg per minute) on a low Na+ intake (10 mmol Na+ per day). During basal conditions, plasma atrial natriuretic peptide was higher (p < 0.05) in low renin patients (16.34 +/- 2.67 fmol/mL) than in both modulators (10.59 +/- 4.29 fmol/mL) and non-modulators (9.85 +/- 2.64 fmol/mL). During Ang II infusion, plasma atrial natriuretic peptide significantly increased in both low renin (27.67 +/- 2.61 fmol/mL at 60 minutes, p < 0.01) and modulating (20.36 +/- 3.07 fmol/mL at 60 minutes, p < 0.05) patients, whereas it did not change in non-modulators (13.94 +/- 4.39 fmol/mL, NS). After 5 days on a high sodium intake (200 mmol Na+ per day), plasma atrial natriuretic peptide rose in modulating (20.61 +/- 2.31 fmol/mL, p < 0.01 versus low sodium intake), non-modulating (20.11 +/- 6.48 fmol/mL, p < 0.01 versus low sodium intake), and low renin (26.13 +/- 3.81 fmol/mL, p < 0.001 versus low sodium intake) hypertensive patients. When the Ang II infusion was repeated with a high sodium intake, plasma atrial natriuretic peptide increased again in low renin and modulating patients, whereas it did not change in non-modulators.(ABSTRACT TRUNCATED AT 250 WORDS)
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