complex regional pain syndrome, a neuromuscular condition characterized by pain and stiffness in the shoulder and arm, limited joint motion, swelling of the hand, muscle atrophy, and decalcification of the underlying bones. It is thought that a disturbance to the sympathetic nervous system is responsible for this condition. The condition occurs most commonly after myocardial infarction. Also called RSD (reflex sympathetic dystrophy syndrome), causalgia, shoulder-hand syndrome. See reflex sympathetic dystrophy.
