Distal contractile integral thresholds on esophageal pressure topography for normal peristalsis and hypercontractile esophagus

Panel A: DCI is normal. Panel B: DCI is elevated. DCI threshold for hypercontractility is >8000 mmHg•s•cm. Note that the IRP and DL are normal. The criteria for hypercontractile (jackhammer) esophagus are at least two liquid swallows with a DCI >8000 mmHg•s•cm with single or multi-peaked contractions in the setting of a normal IRP.