What is the effect of carotid occlusion?

A 12% blood pressure elevation was found during common carotid occlusion in the barodenervated, thoracotomised cat under Nembutal anaesthesia. This rise in blood pressure appeared to be the net result of an 18% increase of total peripheral resistance and a concomitant 5% decrease of mean aortic flow.

What causes ICA occlusion?

Although microembolism is a (rare) cause of border zone infarcts,48 hypotension and severe carotid occlusive disease are the main causes. A CT study recently showed ICA occlusion to be significantly more frequent in a group of patients with border zone infarcts than in patients with other infarcts.

Why common carotid artery occlusion causes increased blood pressure?

Charlier4 observed that common carotid artery occlusion was accompanied by a rise in right atrial pressure, despite the associated increase in cardiac output. Stimulation of the sinus nerve resulted in a decreased cardiac output which Holt5 attributed to peripheral pooling of blood consequent to venodilation.

Why does BP increase when carotid artery is occluded?

The acute increases in vasomotor tone and blood pressure induced by carotid artery occlusion are modulated by platelet-activating factor (PAF) independently of nitric oxide release. J Lipid Mediat Cell Signal.

What is an occlusion in the carotid artery?

Carotid artery occlusive disease is caused by atherosclerosis. Atherosclerotic plaques accumulate in the walls of the arteries and cause them to narrow (stenosis), or become so thick they completely block the flow of blood (occlude). This disease process increases your risk of having a stroke.

What happens when the carotid artery is compressed?

When the common carotid artery was compressed below the sinus area, the intravascular pressure within it was reduced and then cardiac acceleration, vasoconstriction and a rise in arterial pressure occurred.

What does the ECA feed?

The ECA supplies the superficial temporal artery, occipital artery, and several other superficial arteries.

Can carotid artery stenosis cause hypertension?

Conclusions: Results of our work suggest that there is not a significant statistical association between carotid artery stenosis and hypertension, although there is a visible trend in patients (p = 0.142) with carotid artery stenosis towards hypertension.

Is an occlusion a stroke?

Origins and Sites of Occlusion. Ischemic strokes occurring in the anterior circulation are the most common of all ischemic strokes, accounting for approximately 70% of all cases. They are caused most commonly by occlusion of one of the major intracranial arteries or of the small single perforator (penetrator) arteries.