FIGURE 3. A) Measurement of lower esophageal sphincter relaxation by integrated relaxation pressure: note that the nadir pressure values are selected (black arrows), excluding the diaphragmatic pressure (red arrow), during 10 seconds after the beginning of the deglutition; B) measurement of contraction vigor by the distal contractile integral and note that the parameter is calculated considering the amplitude, duration and size of the contractile wave.
