[Syndrome of inappropriate antidiuresis and the current management of hyponatremia].

Hyponatremia defined as serum sodium lower than 135 mmol/L is the most common electrolyte abnormality in outpatients and also in hospitalized patients. It has been documented that hyponatremia is associated with significantly higher morbidity, mortality and longer hospitalization stay. Hyponatremia is manifested by variety of symptoms, from mild up to life threatening conditions. Syndrome of inappropriate antidiuresis (SIAD) is the most common type of hyponatremia. This article presents new aspects in the etiology, diagnosis, differential diagnosis ant treatment of the SIAD according to European guidelines.Key words: arginin-vasopressin-syndrome of inappropriate antidiuresis - diagnosis - hyponatremia - treatment.