The most common cause of renal artery stenosis is atherosclerosis, the same condition that causes narrowing of the arteries in coronary heart disease and stroke, and the risk factors are the same as well. Cholesterol plaques build up along the walls of the renal artery and gradually cause narrowing.
Oxytocin is a commonly used uterotonic that can cause significant and even fatal hypotension, particularly when given as a bolus. The resulting hypotension can be produced by a decrease in systemic vascular resistance or cardiac output through a decrease in venous return.
The main causes of chronic atrophic gastritis and gastric atrophy are autoimmune due to pernicious anemia or chronic Helicobacter pylori infection. In the former condition, there is severe atrophy of the corpus (oxyntic mucosa), with the antrum being speared.In contrast, chronic atrophic gastritis consequent to H. pylori infection is a multifocal pangastritis, involving independent foci in the corpus and antrum of the stomach.n the former condition, there is severe atrophy of the corpus (oxyntic mucosa), with the antrum being speared. In contrast, chronic atrophic gastritis consequent to H. pylori infection is a multifocal pangastritis, involving independent foci in the corpus and antrum of the stomach.