Table 2. Impedance planimetry evaluation results pre and post myotomy.

	30-mL bag volume				40-mL bag volume
	Pre-procedure	Post-procedure	P value	Delta	Pre-procedure	Post-procedure	P value	Delta
Diameter (mm)	6.3 ± 1.7	11.2 ± 1.9	0.06	5.8 ± 3.6	8.6 ± 2.8	14.2 ± 2	0.05	6.7 ± 4.3
CSA (mm 2 )	33.5 ± 20.3	101.8 ± 33.9	0.04	73.8 ± 43	67 ± 40.1	149 ± 39.5	0.035	90.9 ± 54.7
Pressure (mmHg)	34 ± 12.5	24.9 ± 6.7	0.05	–4.3 ± 20	41.6 ± 13.4	31.3 ± 8.8	0.06	–4.8 ± 22.1
Distensibility Index (mm 2 /mmHg)	1.1 ± 0.6	4.5 ± 2.4	0.03	3.6 ± 2.6	2 ± 1.8	5.3 ± 2.6	0.045	3.5 ± 2.6
Compliance (mm 3 /mmHg)	35.4 ± 6.2	130.6 ± 44.7	0.01	16.7 ± 44.9	55.7 ± 16	118.8 ± 14.5	0.03	21 ± 43