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. 2017 Oct 30;23(4):487–494. doi: 10.5056/jnm17026

Figure 7.

Figure 7

Hypercontractile esophagus (jackhammer esophagus). Distal contractile integral (DCI) > 8000 mmHg·sec·cm in at least 20% of swallows and normal distal latency (DL).