to determine if hiatus hernia ( hh ) contributes to the delayed clearance of acid from the esophagus in patients with gastroesophageal reflux ( ger ) , we performed simultaneous esophageal ph recordings and radionuclide studies in three study populations : 12 ger patients with hh , 5 ger patients with no hh , and 8 subjects with hh but no ger symptoms .
C0014876
esophagus
C0017168
ger