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HRM plot with isocontour 30 mmHg lines of a patient with type 3 achalasia esophagus. IRP, integrated relaxation pressure; DL, distal latency; DCI, distal contractile integral. Note that each swallow fulfills the criteria for simultaneous contraction, which are simultaneous onset of 30 mmHg isocontour and DL < 4.5 s.
