Hyponatremia and Congestive Heart Failure: A Marker of Increased Mortality and a Target for Therapy

Table 1

The actions of vasopressin and its receptors.

Receptor	Location	Action
V1a	Vascular smooth muscle	Vasoconstriction
		Myocardial hypertrophy
	Platelets	Aggregation
	Myometrium	Uterine contraction
V1b	Anterior pituitary	Adrenocorticotropin hormone release
V2	Renal collecting tubule	Induction of aquaporin-2
		Free water absorption
	Vascular endothelium	Release of von Willebrand factor
		Release of factor VIII