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What happens in carotid sinus syndrome?

What happens in carotid sinus syndrome?

It has long been observed that pressure at the site where the common carotid artery bifurcates produces a reflex that leads to slowing in heart rate and fall in blood pressure. In some individuals an abnormal response to carotid massage (CSM) is observed.

What happens when the carotid sinus is stimulated?

In short, the increase in blood pressure in carotid sinus will stimulate stretch receptors, which leads to reflex bradycardia and systemic vasodilatation. The baroreceptor reflex is also critical in maintaining heart rate and blood pressure during postural changes.

What causes carotid sinus reflex?

The carotid sinus reflex occurs with changes in transmural pressure of the baroreceptors at the carotid sinus. Afferent signals are sent via glossopharyngeal and vagus nerves to the nucleus tractus solitarius. Efferent signaling occurs through sympathetic and vagus nerves to the heart and blood vessels.

What are the symptoms of carotid sinus syndrome?

Among those who are symptomatic, the following symptoms and signs could be observed in clinical settings:

  • Recurrent dizziness, near-syncope.
  • Recurrent syncope.
  • Nonaccidental, unexplained falls.
  • Symptoms produced by head turning or wearing garments with tight-fitting collars.

Can you feel carotid sinus?

The carotid sinus, or carotid bulb, is a widening of a carotid artery at its main branch point. The carotid sinus contains sensors that help regulate blood pressure. The carotid artery pulse can normally be felt in the neck by pressing the fingertips against the side of the windpipe, or trachea.

Can carotid massage cause death?

Carotid sinus reflex death is a potential etiology of sudden death in which manual stimulation of the carotid sinus allegedly causes strong glossopharyngeal nerve (Vagus nerve is for aortic arch baroreceptors) impulses leading to terminal cardiac arrest.

What is an adverse event that can occur with carotid sinus node disease?

Seizures. Hypertrophic cardiomyopathy. Transient ischemic stroke. Loss of consciousness due to metabolic and toxic conditions (i.e., hypoglycemia).

How does carotid sinus hypersensitivity affect the heart?

In Carotid Sinus Hypersensitivity or Carotid Sinus Syndrome, the carotid sinus artery becomes extremely sensitive to any type of stimulus and as a result starts affecting the heart rate, appropriate blood flow to the brain, and the blood pressure.

Who is most at risk for carotid sinus syndrome?

Individuals with coronary artery disease or other heart conditions are more prone to develop this syndrome. It can also develop in individuals with tumors in head or neck region. Hypertension may also cause Carotid Sinus Hypersensitivity or Carotid Sinus Syndrome.

When is syncope a symptom of carotid sinus syndrome?

56% of cases of unexplained syncope are found to have Carotid sinus hypersensitivity. Carotid Sinus Syndrome is diagnosed when typical presyncopal or syncopal symptoms accompany carotid sinus massage. 26% of cases of unexplained syncope are found to have Carotid Sinus Syndrome.

Which is better carotid sinus syndrome or vasodepressor?

Luckily cardioinhibitory Carotid Sinus Syndrome is more common than the vasodepressor type. Pacemakers can render patients symptom free, or almost symptom free. No effective treatment for vasodepressor Carotid Sinus Syndrome is known but it is worth trying Fludrocortisone or other measures used to treat orthostatic hypotension. Back to Syncope.