Causes of metabolic alkalosis include all the following except -

Mineralo corticoid deficiency is a cause normal anion gap metabolic acidosis- Recurrent vomiting Gastro intestinal loss of H+ from repeated vomitings results in retention of HCO3- and hence metabolic alkalosis Thiazides Thiazides are diuretics which acutely diminish the ECF volume without altering the total body bicarbonate The serum Bicarbonate concentration, therefore, increases and hence metabolic alkalosis Bartter's Syndrome Bartter's syndrome is characterized pathologically by impaired Cl- reabsorption in the thick ascending loop of Henle and clinically by a triad of Metabolic alkalosis Hypokalemia Normal or low B.P.