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. 2020 Oct 13;35(10):5787–5795. doi: 10.1007/s00464-020-08068-4

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© The Author(s) 2020

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Fig. 4 — A HRM line tracing of a GERD patient prior to MSA showing a low iBP, B HRM line tracing of the same patient after MSA with elevated iBP (black rectangle), recognized by rise in pressure to a plateau above the esophageal baseline just preceding the upstroke of esophageal contraction wave