specialized nerve end organs producing a slight dilatation of the carotid artery where it branches into the external and internal carotid arteries, responding to changes in blood pressure by mediating changes in the heartbeat rate.
carotid sinus n.
A dilation of the common carotid artery at its bifurcation into the internal and external carotids, containing baroreceptors that when stimulated cause slowing of the heart, vasodilation, and a fall in blood pressure.
A dilated region that is located at the point of bifurcation of the carotid artery and contains pressure receptors (called baroreceptors), which upon stimulation cause slowing of the heart rate, vasodilation, and a decrease in blood pressure.
- Carotid sinus syncope
carotid sinus syncope carotid sinus syncope n. Syncope resulting from overactivity of the carotid sinus and occurring either spontaneously or in reaction to pressure on a sensitive carotid sinus.
- Carotid triangle
carotid triangle carotid triangle n. A space bounded by the superior belly of the omohyoid muscle, by the anterior border of the sternocleidomastoid muscle, and by the posterior belly of the digastric muscle, containing the bifurcation of the common carotid artery.
- Carotid-body tumor
carotid-body tumor carotid-body tumor n. See chemodectoma.
- Carotid-cavernous fistula
carotid-cavernous fistula carotid-cavernous fistula n. An arteriovenous communication due to rupture of the intracavernous portion of the carotid artery.