Characteristic feature of primary aldosteronism is -
Low serum sodium
High plasma renin
Low serum potassium
High serum creatinine
hyper secretion of aldosterone increases renal distal tubular exchange of intra tubular sodium for secreted potassium and hydrogen ions, with progressive depletion of body potassium resulting in hypokalemia ( Harrison 17 pg 2260)
Endocrinology