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Mean volume-pressure curve in the dyspeptic patients and healthy volunteers. The inflation (ascending part of the pressure-volume) curve showed a significantly steeper slope (p<0.05) in the dyspeptic patients than in the controls, indicating a higher compliance in the dyspeptic patients. The descending part of the pressure-volume curve (deflation) showed a delay in the return of the gastric volume toward the values at minimal distending pressure (MDP) (hysteresis).
