Table 1

Classification of oesophageal motility abnormalities

Inadequate LOS relaxation
 Classic achalasia
 Atypical disorders of LOS relaxation
Uncoordinated contraction
 Diffuse oesophageal spasm
Hypercontraction
 Nutcracker oesophagus
 Isolated hypertensive LOS
Hypocontraction
 Ineffective oesophageal motility