Effects of anti-hypertensive drugs on esophageal body contraction

Figure 1 Peristaltic contractions in the esophageal body were divided into three different segments (segments 1, 2, and 3, from oral to anal) by two troughs. UES: Upper esophageal sphincter; LES: Lower esophageal sphincter.

Figure 2 Peak esophageal peristaltic pressures in the three segments with and without administration of drugs. A: Nifedipine; B: Atenolol. ^aP < 0.05 vs no medication.