The behavior of the lower esophageal sphincter (LES) was studied by manometry in 21 healthy volunteers of both gender, aged 20-47 years who were divided into two groups: one group called the ESOPHAGITIS (GE) and a second group , the CONTROL group (GC). The GE was composed of 13 patients diagnosed with mild reflux esophagitis without hiatal hernia or hernias up to 2 cm. The GC was of healthy volunteers. A previo...