Fig. 2
From: Hyponatremia in the intensive care unit: How to avoid a Zugzwang situation?
Etiological diagnostic strategy. CKD chronic kidney disease, SIADH syndrome of inappropriate antidiuretic secretion, \( {\text{Na}}_{u}^{ + } \) urine sodium concentration. a A rare instance in routine clinical practice. b High water intake along with increased AVP levels may coexist. Asterisk in the absence of concurrent increased EFCV