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.
Differences in how we respond to a brain chemicalcalled oxytocin, suggests the latest stress research. Sometimes referred to as the bonding hormone or love hormone, oxytocin makes people (animals, too) care for each other. Sex (and masturbation) will trigger its release, but it alsohas ties to stressful situations.