Carotid Sinus


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carotid sinus

[kə′räd·əd ′sī·nəs]
(anatomy)
An enlargement at the bifurcation of each carotid artery that is supplied with sensory nerve endings and plays a role in reflex control of blood pressure.

Carotid Sinus

 

(bulbus caroticus, sinus caroticus, the dilated area of the common carotid artery before bifurcation into its external and internal branches.

The carotid sinus is an important reflexogenic zone that plays a part in maintaining the constancy of arterial pressure, heart action, and blood gases content; it is the site of baroreceptors, which react to changes in blood pressure, and chemoreceptors, which react to changes in the chemical composition of the blood and in oxygen tension. The carotid sinus is innervated by the sensory branch of the glossopharyngeal nerve (sinus nerve, Hering’s nerve). Excitation of the nerve endings in the carotid sinus is the first link in the chain of the carotid reflexes.

I. N. D’IAKONOVA

References in periodicals archive ?
I was remembering that no matter how well I tried to teach those amazing nurses how to massage his carotid sinus, his heart responded only to my touch.
Mass lesions of the neck involving the carotid sinus or airway are a potentially modifiable cause of sinus bradycardia and sleep apnea.
The initial strategy should be to terminate an SVT with a vagal manoeuvre, such as carotid sinus massage, after excluding any carotid artery bruit.
* Vagal manoeuvres like Carotid sinus massage, Valsalva maneuver or phaiyngeal stimulation can abort the re-entrant variety of PSVT.
This elevates the excitability of the nerve endings which increases the activity of the carotid sinus nerve of the carotid body for eliciting the chemoreflex.
Other precipitating factors include foreign body ingestion (iatrogenic secondary to instrumentation and laryngoscopy), carotid sinus massage (3) and even acupuncture (6).
The pressure on carotid sinus baroreceptors, which are located just cephalad to the bifurcation of the common carotid artery, results in bradycardia, hypotension, or combination of both.
Bradycardia, related to manipulation of the carotid sinus baroreceptors located in the carotid bulb, may occur during the procedure just after the stent implantation and/or balloon angioplasty (Martinez-Fernandez et al., 2008).
(9) Horner syndrome may result from cervical sympathetic chain invasion, and syncope can occur after carotid sinus compression.
Our patient did not respond to carotid sinus massage and asthma precluded the use of adenosine and beta blockers.
The system consists of a battery-powered implantable generator inserted under the skin near the collarbone and two carotid sinus leads, which run from the generator to the left and right carotid sinuses in the neck.