منابع مشابه
Effect of esophageal contraction on esophageal wall blood perfusion.
Myocardial blood flow occurs during the diastolic phase of the cardiac cycle, because myocardial contraction during the systolic phase impedes myocardial perfusion. Using laser Doppler perfusion technique, we studied the effect of esophageal contraction on the esophageal wall perfusion. Studies were conducted in rats. A laser Doppler probe was anchored to the esophageal wall, and wall perfusion...
متن کاملMechanics and hemodynamics of esophageal varices during peristaltic contraction.
Our hypothesis states that variceal pressure and wall tension increase dramatically during esophageal peristaltic contractions. This increase in pressure and wall tension is a natural consequence of the anatomy and physiology of the esophagus and of the esophageal venous plexus. The purpose of this study was to evaluate variceal hemodynamics during peristaltic contraction. A simultaneous ultras...
متن کاملCa-induced contraction of cat esophageal circular smooth muscle cells
Cao, W., Q. Chen, U. D. Sohn, N. Kim, M. T. Kirber, K. M. Harnett, J. Behar, and P. Biancani. Ca-induced contraction of cat esophageal circular smooth muscle cells. Am J Physiol Cell Physiol 280: C980–C992, 2001.— ACh-induced contraction of esophageal circular muscle (ESO) depends on Ca influx and activation of protein kinase Ce (PKCe). PKCe, however, is known to be Ca independent. To determine...
متن کاملSustained esophageal contraction: a motor correlate of heartburn symptom.
Heartburn occurs in the presence as well as the absence of acid reflux. We searched for a motor correlate of heartburn. Twelve subjects with heartburn were studied with 24-h synchronized pressure, pH, and high-frequency intraluminal ultrasound (HFIUS) imaging of the esophagus. The HFIUS images were analyzed every 2 s for a period of 2 min before and 30 s after the onset of heartburn during 20 a...
متن کاملDistinct kinases are involved in contraction of cat esophageal and lower esophageal sphincter smooth muscles.
Contraction of smooth muscle depends on the balance of myosin light chain kinase (MLCK) and myosin light chain phosphatase (MLCP) activities. Because MLCK activation depends on the activation of calmodulin, which requires a high Ca(2+) concentration, phosphatase inhibition has been invoked to explain contraction at low cytosolic Ca(2+) levels. The link between activation of the Ca(2+)-independe...
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ژورنال
عنوان ژورنال: The Japanese Journal of Gastroenterological Surgery
سال: 1985
ISSN: 0386-9768,1348-9372
DOI: 10.5833/jjgs.18.2270