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Abnormal acid-base regulation in salt-sensitive normotensive man
1Abteilung für allgemeine Innere Medizin und Nephrologie, Klinikum Steglitz der Freien Universität, Berlin.
Klinische Wochenschrift
|January 1, 1991
Summary
Salt-sensitive hypertension is linked to metabolic acidosis, characterized by lower pH and bicarbonate levels. This suggests a potential role for acid-base balance in blood pressure regulation, particularly in salt-sensitive individuals.
Area of Science:
- Nephrology
- Cardiovascular Physiology
- Acid-Base Balance
Background:
- Metabolic acidosis is observed in salt-sensitive genetic hypertension rat models.
- Normotensive salt-sensitive individuals exhibit lower arterial pH and bicarbonate levels.
- This suggests a link between salt-sensitivity and relative acidosis in humans.
Purpose of the Study:
- To investigate the relationship between salt-sensitivity and metabolic acidosis.
- To explore the implications of acid-base status in hypertension.
- To understand the underlying mechanisms of salt-sensitivity.
Main Methods:
- Observational studies in rat models and human subjects.
- Analysis of arterial pH and bicarbonate levels.
- Assessment of blood pressure responses to alkalinizing agents.
Main Results:
- Salt-sensitive hypertension is associated with metabolic acidosis.
- Alkalinizing agents (sodium bicarbonate, citrate) did not lower blood pressure in essential hypertension patients.
- These agents sometimes even increased blood pressure.
Conclusions:
- Salt-sensitivity in humans is associated with a relative acidosis.
- Alkalinizing therapies may not be effective for blood pressure reduction in essential hypertension.
- Potential contributing factors include enhanced Na+/H(+)-antiport activity and altered renal electrolyte handling.