Device and Implantation System for Electrical Stimulation of Biological Systems

A system for treating a patient with gastroesophageal reflux disease, comprising:

• at least one electrode positioned within 3 cm above and 3 cm below the patient's lower esophageal sphincter (LES);
• a waveform generator operably coupled to said at least one electrode;
• a controller configured to electrically stimulate the LES to increase the pressure or function of the LES from a first level to a second level, wherein said increase in LES pressure or function above the first level occurs during stimulation and continues after stimulation ceases and wherein said controller controls the waveform generator to repeatedly:
• a) generate and apply an electrical pulse train to the LES through the at least one electrode for a stimulation period, and
• b) terminate the electrical pulse train for a rest period.