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.
But for those who are used to having high blood pressure, episodes of low blood pressure can signal a problem and can cause the above symptoms. An onset of hypotension is more likely to occur when you: 1  Are on bed rest for a long period of time, and then resume an upright posture. 2  Are in your first 24 weeks of pregnancy.ut for those who are used to having high blood pressure, episodes of low blood pressure can signal a problem and can cause the above symptoms. An onset of hypotension is more likely to occur when you: 1  Are on bed rest for a long period of time, and then resume an upright posture. 2  Are in your first 24 weeks of pregnancy.