Primary waves were recorded at a mean propagation speed of 55.58 mm/s from UES to upper segment of esophagus ,22.15 mm/s from upper to middle segment,41.12 mm/s from middle to lower segment,and 14.09 mm/s from lower segment to LES.

 
  • 食管下括約肌的靜息壓為2.;55±1
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