Oxytocin (OT), historically known for its actions on the reproductive system, may also contribute to the regulation of cardiovascular and water-electrolyte homeostasis. OT is produced in the supraoptic and paraventricular nuclei of the hypothalamus and released into plasma from neural terminals of the posterior pituitary, however, many studies have identified extra-cerebral sites of OT production, including the heart and vascular endothelium. Activation...