Search results
Results from the WOW.Com Content Network
Carotid sinus syncope is due to pressure on the carotid sinus in the neck. [2] The underlying mechanism involves the nervous system slowing the heart rate and dilating blood vessels, resulting in low blood pressure and thus not enough blood flow to the brain. [2] Diagnosis is based on the symptoms after ruling out other possible causes. [3]
The carotid sinus is at the origin of the internal carotid artery. In human anatomy, the carotid sinus is a dilated area at the base of the internal carotid artery just superior to the bifurcation of the internal carotid and external carotid at the level of the superior border of thyroid cartilage. The carotid sinus extends from the bifurcation ...
Depends on underlying cause [2] Frequency. ~5 per 1,000 per year [1] Syncope, commonly known as fainting or passing out, is a loss of consciousness and muscle strength characterized by a fast onset, short duration, and spontaneous recovery. [1] It is caused by a decrease in blood flow to the brain, typically from low blood pressure. [1]
Strangling involves one or several mechanisms that interfere with the normal flow of oxygen into the brain: [ 3 ][ 4 ] Compression of the carotid arteries or jugular veins —causing cerebral ischemia. Compression of the laryngopharynx, larynx, or trachea —causing asphyxia. Stimulation of the carotid sinus reflex —causing bradycardia ...
The classic symptom of subarachnoid hemorrhage is thunderclap headache (a headache described as "like being kicked in the head", [ 3 ] or the "worst ever", developing over seconds to minutes). This headache often pulsates towards the occiput (the back of the head). [ 11 ] About one-third of people have no symptoms apart from the characteristic ...
The carotid body is a small cluster of peripheral chemoreceptor cells and supporting sustentacular cells situated at the bifurcation of each common carotid artery in its tunica externa. [1][2] The carotid body detects changes in the composition of arterial blood flowing through it, mainly the partial pressure of arterial oxygen, but also of ...
Baroreflex activation therapy. Baroreflex activation therapy is an approach to treating high blood pressure and the symptoms of heart failure. It uses an implanted device to electrically stimulate baroreceptors in the carotid sinus region. This elicits a reflex response through the sympathetic and vagal nervous systems that reduces blood pressure.
The common carotid artery arises directly from the aorta on the left and as a branch of the brachiocephalic trunk on the right. In anatomy, the left and right common carotid arteries (carotids) (English: / kəˈrɒtɪd / [1][2]) are arteries that supply the head and neck with oxygenated blood; they divide in the neck to form the external and ...