Table 4. Comparison of S/N between esophageal catheter and thoracic wall ECGs

S/N[dB]
ID	H3	H7	H9	H11	H12	H15	H17	average
esophagus	12.0	13.6	11.8	10.9	12.2	10.4	10.2	11.6
battlements	3.6	4.0	3.8	3.3	4.2	2.6	3.8	3.6