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Low atrial natriuretic peptide plasma concentrations in 100 patients with essential hypertension
J Talartschik1, T Eisenhauer, J Schrader
1Department of Nephrology, University Clinic, Göttingen, West Germany.
Insights
In patients with essential hypertension, atrial natriuretic peptide (ANP) levels were often low, suggesting diminished ANP secretion contributes to elevated blood pressure. This finding challenges previous controversial results in hypertensive individuals.
Area of Science:
- Cardiology
- Endocrinology
- Nephrology
Background:
- Atrial natriuretic peptide (ANP) is crucial for regulating fluid balance and blood pressure.
- Previous studies on ANP in hypertensive patients yielded conflicting results.
Purpose of the Study:
- To investigate atrial natriuretic peptide (ANP) plasma concentrations in patients with essential hypertension.
- To explore the relationship between ANP levels and blood pressure in this cohort.
Main Methods:
- Studied 100 patients (58 men, 42 women) aged 19-78 with essential hypertension.
- Utilized 24-hour ambulatory blood pressure monitoring, treadmill exercise tests, and chest X-rays.
- Measured plasma concentrations of ANP in patients and compared them to healthy controls.
Main Results:
- ANP plasma concentrations were within the normal range in 70% of hypertensive patients.
- Over 52% of patients exhibited ANP levels in the lower third or below the normal range (17-38 fmol/mL).
- Healthy controls (n=50) had ANP levels ranging from 17 to 38 fmol/mL.
Conclusions:
- Diminished ANP secretion may contribute to elevated blood pressure in mild to moderate essential hypertension.
- These findings suggest a potential role for reduced ANP in the pathophysiology of hypertension.
- Further research is warranted to clarify the complex role of ANP in hypertensive states.
Abstract:
Although atrial natriuretic peptide (ANP) plays a key role in electrolyte and volume regulation and causes direct vasorelaxation, controversial results have been reported in hypertensive patients. We studied 58 men and 42 women, aged 19 to 78 years, with essential hypertension (blood pressure: 150 to 210/95 to 110 mm Hg) using 24 h blood pressure recording, treadmill exercise and x-ray of the chest. In 70 patients ANP plasma concentrations were found to be completely within the normal range of healthy controls (17 to 38 fmol/mL; n = 50) and 52% were detected within the lower third or even below the normal range. In mild to moderate essential hypertension a diminished secretion of ANP may be responsible for an elevated blood pressure in these patients.