Recent advancement of therapeutic endoscopy in the esophageal benign diseases

Table 1 Series reporting Eckardt post Per-oral endoscopic myotomy for achalasia

Ref.	Country	No. of patients	Success rate (%)	Complications (%)	Mean follow-up (mo)
inoue et al[82] 2010a	Japan	17	100	0	5
von Renteln et al[79] 2012	Germany	16	94	12.5	3
Swanstrom et al[67] 2012	United States	18	100	16.7	11
Ren et al[85] 2012	China	119	94	55	3
Costamagna et al[65] 2012	Italy	11	100	0	3
Lee et al[66] 2013	South Korea	13	100	0	7
Hungness et al[76] 2013	United States	18	89	22	6
Teitelbaum et al[77] 2013	United States	12	100	NR	9
Zhou et al[83] 2013b	China	12	92	16.7	10
Von Renteln et al[64] 2013c	International	70	82.4	14.3	12
Sharata et al[84] 2013d	United States	31	100	12.5	6
Freidel et al[68] 2013	United States	45	95	33	3
Inoue et al[80] 2013	Japan	300	100	6	12
Sharata et al[73] 2014	United States	75	98	11	16
Bhayani et al[78] 2014	United States	37	100	13.5	6
Minami et al[63] 2014	Japan	28	96	0	3

^aEckard score was not used, but rather a dysphagia symptoms score which decreased from mean of 10 to 1.3;

^bAll patient had previous laparoscopic Heller myotomy;

^cEuropean and North American;

^dIncluded other spastic esophageal disorders, total 31 achalasia cases; Complications rate reported is for all 40 cases performed. NR: Not reported.