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.
More specifically, oxytocin is used for the following reasons before childbirth: 1  To induce labor when there is a medical reason for this, such as: 2  Rh problems (when a mother has Rh-negative blood and the baby has Rh-positive blood) 3  When the mother has gestational diabetes.  When the mother has developed preeclampsia.