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(a) The device tip is shown in position against the serosa of the gastric antrum. (b) A typical slow wave event recorded by the device is shown at t = 324 s. A slight lag is noted between channels and distant ECG signals are recognisable as small notched deflections. (c) Activation map of the event in (b), showing aboral slow wave propagation at a velocity of 6.3 ± 0.9 mm s−1.
