Carotid artery stenosis for screening for carotid artery stenosis depends on whether someone is experiencing symptoms arising from the stenosis or has risk factors for the development of carotid artery disease. The U.S. Preventive Services Task Force (USPSTF) recommends against routine screening for carotid artery stenosis in those without symptoms. While routine population screening is not advised, the American Heart Association recommends screening for people who don’t have symptoms of carotid stenosis but have been diagnosed with related medical conditions or have risk factors for carotid artery disease. Screening is recommended for people who have: The American Heart Association also recommends screening if
Carotid body central chemoreceptors in the medulla oblongata that are primarily sensitive to changes in pH and P (a decrease in pH and an increase in P). The carotid body chemoreceptors are also sensitive to pH and P, but only secondarily. More specifically, the sensitivity of carotid body chemoreceptors to decreased P is greater when pH is decreased and P is increased. The output of the carotid bodies is low at an oxygen partial pressure above about 100mmHg (13,3 kPa) (at normal physiological pH), but below 60mmHg the activity of the type I (glomus) cells increases rapidly due to a decrease in