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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: Gastroenterology. 2012 May 15;143(3):576–581. doi: 10.1053/j.gastro.2012.05.005

Figure 1.

Figure 1

Impedance-pH recordings demonstrating acid reflux (A), WAR (B), and WAlkR (C). The green colorization on the impedance tracings illustrates the retrograde flow of refluxate to the most proximal recording site (17 cm). The corresponding pH tracing in red at the bottom demonstrates the nadir pH to be 2.3 in A, 5.8 in B, and 7.2 in C.