1. A method comprising: measuring, by an impedance and high resolution manometry catheter in an esophagus, data representative of a pressure and/or an impedance associated with a plurality of swallowing events, the impedance and high resolution manometry catheter having a plurality of segments, and the data being measured by one or more electrodes disposed at each of the plurality of segments; determining, based on the data measured by the impedance and high resolution manometry catheter and a predetermined amount of a bolus consumed during each of the plurality of swallowing events, a cross-sectional area of the esophagus; determining, based on the cross-sectional area and a segment pressure from the plurality of swallowing events, an average value for work done by a segment of the esophagus, the segment pressure being exerted by the segment of the esophagus, and the bolus consumed having a same volume for each of the plurality of swallowing events; generating a display of the determined cross-sectional area; and presenting the generated display, wherein the generated display includes at least a plot of the segment pressure exerted by the segment of the esophagus as a function of location along the segment of the esophagus and as a function of time.