Many patients suffer from diseases and surgical damage that result in failure
of the stomach and intestinal tract to contract and relax normally in order to
transfer contents distally. Electrical stimulation applied to one or more sites
on the surface of the gastrointestinal viscera can treat this problem by triggering
or altering muscle contractility. The present invention provides such stimulation
by implanting leadless microstimulators in or on the walls of the viscera that
can be programmed or controlled from a source outside the body.
