How common is carotid sinus hypersensitivity?
The worldwide prevalence of CSH is near 30% of unexplained syncope in elderly, and 14% of the nursing home residents, it is worthy to say that there is an overlap between CSH and vasovagal syncope, orthostatic hypotension and other causes of syncope, this makes a margin of error estimating the incidence rate of each …
What is carotid sinus and body?
Carotid Sinus. The carotid sinus is a baroreceptor that senses changes in systemic blood pressure and is located in the adventitia of the carotid bulb of the internal carotid artery. Due to its location the carotid sinus is an intimately related but distinct organ from the carotid body.
What is carotid sinus hypersensitivity?
Carotid sinus hypersensitivity (CSH) consists of the observation that stimulation of the carotid artery baroreceptors results in a greater than expected fall in heart rate and drop in blood pressure.
What is the function of the carotid sinus reflex?
The carotid sinus reflex plays a central role in blood pressure homeostasis. Changes in stretch and transmural pressure are detected by baroreceptors in the heart, carotid sinus, aortic arch, and other large vessels.
What is indinduced carotid sinus syndrome (CSH)?
Induced carotid sinus syndrome is more prevalent than spontaneous carotid sinus syndrome and accounts for the bulk of patients with an abnormal response to carotid sinus massage observed in the clinical setting. CSH is found in 0.5-9.0% of patients with recurrent syncope.
What is the pathophysiology of hypersensitive carotid baroreflexes?
Although baroreceptor function usually diminishes with age, some people experience hypersensitive carotid baroreflexes. For these individuals, even mild stimulation to the neck results in marked bradycardia and a drop in blood pressure.