In the elliptical orbit, the center of mass of the orbiting-orbited system is at one focus of both orbits, with nothing present at the other focus. As a planet approaches periapsis, the planet will increase in speed, or velocity.
Drugs that cause hyponatremia include: 1  Diuretics: Thiazides, bumetanide, indapamide, ethacrynic acid, furosemide. 2  Antidepressants: Selective serotonin reuptake inhibitors, tricyclic antidepressants (amitriptyline, protriptyline, desipramine), monoamine oxidase inhibitors, venlafaxine.
antidiuretic hormone (SIADH) secretion. Hyponatremia can be classified according to the vol-ume status of the patient as hypovolemic, hypervolemic, or euvolemic. Hypervolemic hypona-tremia may be caused by congestive heart failure, liver cirrhosis, and renal disease. Differenti-