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PubMed1995

[Effects of potassium chloride and triamterene on kaliuresis, natriuresis and diuresis in congestive heart failure].

KCl and triamterene were given to 52 patients (27 males and 25 females with CHF) aged 21-82 years. Large-dose KCl (6 g daily) apparently stimulate kaliuresis, natriuresis and diuresis. As a rule, this is associated with a rise or a fall of plasma potassium concentrations. In the latter case potassium elimination runs more actively and may involve both introduced and body's potassium. As low and moderate doses of KCl (1-4 g daily) showed neither natriuretic nor diuretic effects while enhanced kaliuresis occurred in half of the patients only, did not lower potassium concentrations in plasma they are preferable. Daily treatment with triamterene is characterized by inhibition of its K-retaining action on administration day 2-3. Within first 2 days of triamterene discontinuation all the retained K eliminates from the body. Diuretics-induced metabolic alkalosis decreased intensification of natriuresis and diuresis resultant from large-dose KCl treatment.

Adult↗
PubMed1984

The antihypertensive effect of dietary potassium chloride loading in rats with adrenal regeneration hypertension.

Adrenal regeneration hypertension was induced in male Wistar rats by unilateral adrenal enucleation, contralateral adrenalectomy and the provision of a 1% (w/v) NaCl solution for drinking. A fivefold increase in dietary KCl content caused a significant reduction in the systolic blood pressure of hypertensive rats but not of control rats. During the increase in potassium intake there was a marked polydipsia. When 1% NaCl solution was the drinking fluid, the resultant increase in sodium intake was associated with an abolition of the antihypertensive effect of potassium loading, but when the sodium intake was held constant, the antihypertensive effect was maintained. In rats with adrenal regeneration hypertension, plasma volume was significantly higher, and packed cell volume and plasma protein concentrations were significantly lower than in control rats. These differences were abolished after 4 days of dietary KCl supplementation. Increased dietary potassium intake was associated with significantly lower serum aldosterone concentrations and significantly higher plasma potassium concentrations in adrenal enucleated rats compared with controls. The possibility that a reduction in extracellular fluid volume (due to a natriuresis) and/or a peripheral vasodilatation contributed to the antihypertensive effect of KCl loading is discussed.

Adrenal Glands↗
PubMed1985

Effect of aldosterone on potassium excretion during potassium chloride infusion in sheep.

Experiments were performed on normal mature ewes to quantitate the effect of acute variations in aldosterone activity on renal K excretion. Six-hour clearance studies were performed on three sheep. Treatments were control (no infusion), infusion of KCl (140 meq in 2 h) alone or with superimposed infusions of aldosterone (20 micrograms/h), or infusion of aldosterone antagonist potassium canrenoate (100 mg/h). During KCl infusion there were simultaneous increases in plasma K, K excretion, and Na excretion. Aldosterone treatment diminished the increase in plasma K and in Na excretion but increased the rate of K excretion. Canrenoate had opposite effects. The rate of change of K excretion relative to the change in plasma K was 417 for aldosterone and 102 microeq/min per meq/l for canrenoate treatments, P less than 0.05. Before KCl infusion aldosterone decreased the rate of Na excretion and the salivary Na-to-K ratio but did not alter plasma K or K excretion. Aldosterone has a potent kaliuretic action in sheep when plasma K is elevated.

Aldosterone↗