frequent regurgitation of “sour” material
A 45-year-old woman complained of heartburn and frequent regurgitation of “sour” material into her mouth. Often while sleeping, she would be awakened by a severe cough. The results of her physical examination were negative. Studies Results Routine laboratory studies Negative Barium swallow (BS), p. 941 Hiatal hernia Esophageal function studies (EFS), p. 624 Lower esophageal …