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.
OXYTOCIN (PITOCIN) Description. Oxytocin means rapid birth.. It is a synthetic hormone named for the natural posterior pituitary hormone. It stimulates uterine smooth muscle contractions indirectly and helps expedite the normal contractions of spontaneous labor.As in all significant uterine contractions, there is a transient reduction in uterine blood flow.t stimulates uterine smooth muscle contractions indirectly and helps expedite the normal contractions of spontaneous labor. As in all significant uterine contractions, there is a transient reduction in uterine blood flow.