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Pharmacologic Evidence for a Cardiac Sphincter Mechanism in the Cat

1961; Elsevier BV; Volume: 40; Issue: 1 Linguagem: Inglês

10.1016/s0016-5085(61)80008-5

1528-0012

Eric A. Schenk, E. L. Frederickson,

Cardiac Arrhythmias and Treatments

Summary Evidence is presented that epinephrine constricts the lower segment of esophagus, whereas acetylcholine and vagal stimulation relax the circular muscle component of this area. The action of these autonomic mediators is localized and discrete and clearly delineates the cardiac sphincter in the cat.