
Schwartz–Bartter syndrome
Schwartz-Bartter Syndrome (SIADH): Excess ADH leads to water retention and dilutional hyponatraemia, with low serum sodium and osmolality but inappropriately concentrated urine.

Schwartz-Bartter Syndrome (SIADH): Excess ADH leads to water retention and dilutional hyponatraemia, with low serum sodium and osmolality but inappropriately concentrated urine.

Bartter Syndrome: Renal tubulopathy with hypokalaemic alkalosis, high renin and aldosterone, normal BP, and polyuria—mimics loop diuretic effect at the thick ascending limb.

Frederic Crosby Bartter (1914–1983) American endocrinologist. Defined Bartter syndrome, co-described SIADH, and advanced adrenal and renal physiology.