Table 1. Patients with Jackhammer esophagus treated with POEM.

Patient	Myotomy (cm)	LES included	Median IRP (mmHg)		Mean DCI (mmHg.cm.s)		Eckardt score		IEM*
			Before	After	Before	After	Before	After
1	20	–	19.5	23.5	12 516.5	84.2	2	6	+
2	21	+	16.4	10.5	18 332.4	137.7	5	0	+
3	12	+	33.8	16.2	46 700	2019.6	5	0	–
4	23	+	7.3	12.4	15 388.7	234	11	2	+

^*IEM-ineffective esophageal motility after POEM = ≥ 50 % ineffective swallows (failed or weak contraction vigor [DCI < 450 mmHg.cm.s])