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 causes the cells in the milk-making lobes of your breasts to contract and eject the milk toward the nipple, where your baby can pump it out. (If your baby isn't nursing at that moment, the milk may leak or even spray .). The more often you nurse in the early days and weeks, the more quickly your reflex will become attuned to your baby, and spontaneous letdowns (and leaks) will gradually disappear.