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 is one of the two major hormones secreted from the posterior lobe of the pituitary gland. he posterior pituitary itself largely comprises endings of nerves whose cell bodies lie in the brain in the hypothalamus. Oxytocin is a relatively small peptide hormone, composed of only 9 amino acids.It is synthesized in nerve cells in the hypothalamus in the form of a larger, precursor molecule, which is transported down the nerve fibres through the pituitary stalk to the posterior lobe.xytocin is secreted by the pituitary gland. Specifically, it is from the posterior pituitary, with posterior meaning the back or behind the pituitary gland.