dysphagia related: GI gastroenterology achalasia and pseudoachalasia zenker Tests barium esophagram: zenker esophageal manometry: motility disorder like achalasia usually dysphagia to liquids or both solids and liquids ambulatory pH testing and impedance-pH testing: acid exposure acid, nonacid reflux for GERD Links to this note GI gastroenterology dysphagia achalasia and pseudoachalasia related: GI gastroenterology, dysphagia zenker related: GI gastroenterology, dysphagia