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Achalasia: New HRM Classification

Gastroenterology 2008;135:1528-1533

Type 1 – Classic achalasia with minimal oesophageal pressurization
Type 2 – Achalasia with oesophageal compression
Type 3 – Achalasia with spasm, functional obstruction, some peristalsis

Response to therapy
Type 1 – 56% overall
Type 2 – 71% BoTox, 91% Balloon Dilatation, 100% Heller’s Myotomy
Type 3 – 29% overall