stimulated renal sympathetic nerve activity to basal renal sympathetic nerve activity ratio 2013-09-20T12:30:31Z A calculated measurement in which the recordable electrical energy of a renal sympathetic nerve assessed after the application of an agent or activity designed to excite or increase the activity of is divided by the activity of such a nerve assessed without outside influences and presented as a ratio, fraction, quotient or percentage. A renal sympathetic nerve is a nerve (a cordlike structure that conveys impulses between the central nervous system and one or more parts of the body, and that consists of an outer connective tissue sheath surrounding a bundle of conductive fibers) of the autonomic nervous system that regulates involuntary and automatic reactions, especially to stress, associated with and controlling activity of the kidneys. CMO:0001786 JSmith VT:0004050 clinical_measurement_ontology stimulated RSNA to basal RSNA ratio ratio of change in renal sympathetic nerve activity