Carotid Artery Disease

Many people have no symptoms before carotid disease is detected. Assessment aims to determine the severity of narrowing, whether it has caused neurological symptoms, and whether medical treatment alone or a procedure to reduce stroke risk is appropriate.

Plaque within a carotid artery can restrict blood flow, but the greater danger is often that its surface becomes unstable and releases small clots or fragments that travel to the brain. This is why the character of the plaque and any recent symptoms matter as much as the percentage of narrowing on a scan.

The most common cause is atherosclerosis, in which cholesterol-rich plaque develops within the artery wall. Smoking, diabetes, high blood pressure, high cholesterol, increasing age and established cardiovascular disease increase risk.

The surface of a plaque can sometimes become unstable. Small clots or fragments may travel to the brain and interrupt blood flow.

Carotid disease is often silent until a TIA or stroke occurs. Warning signs include sudden facial droop, weakness or numbness on one side of the body, speech difficulty, loss of vision in one eye, severe imbalance or another abrupt neurological change.

Symptoms that resolve within minutes or hours may represent a TIA. They still require emergency assessment, because a TIA can be the immediate forerunner of a major stroke. Call Triple Zero (000) for any suspected stroke or TIA rather than waiting for a clinic appointment.

Duplex ultrasound measures blood flow through the carotid arteries and estimates the degree of narrowing, and it is usually the first test performed. CT or MR angiography defines the anatomy of the neck and intracranial vessels, while brain imaging identifies recent or previous stroke.

The surgeon also reviews when any symptoms occurred, current antiplatelet and cholesterol therapy, blood pressure control and general cardiovascular risk, because the benefit of any carotid procedure depends heavily on timing and patient factors. Catheter angiography is reserved for selected cases, and results are always interpreted alongside the clinical picture rather than in isolation.

Every patient needs careful management of smoking, blood pressure, cholesterol and diabetes, with antiplatelet therapy where appropriate. For selected patients with significant narrowing, particularly after recent symptoms, a procedure to reduce stroke risk may be recommended.

The options are carotid endarterectomy, carotid stenting and transcarotid artery revascularisation (TCAR). The choice depends on the degree and position of the narrowing, the interval since symptoms, neck anatomy, previous surgery or radiotherapy, and the patient's surgical risk.

Medical management

Management usually includes antiplatelet medication, cholesterol-lowering therapy, blood pressure control, diabetes management and smoking cessation. These measures reduce the risk of stroke and other cardiovascular events.

Medical treatment remains important even when a carotid procedure is performed.

Carotid endarterectomy

Carotid endarterectomy is an open operation that removes plaque from inside the carotid artery. It is commonly considered for patients with significant narrowing that has caused recent neurological symptoms, and for selected patients with severe asymptomatic disease.

The benefit depends on the degree of stenosis, timing after symptoms, general health and procedural risk.

Carotid stenting and TCAR

Carotid stenting places a stent across the narrowed segment using a catheter-based approach. Transcarotid artery revascularisation, or TCAR, uses a small neck incision and temporary reversal of blood flow to reduce the chance of material travelling to the brain during stent placement.

These techniques may be considered when open surgery carries additional risk or when anatomy favours a stent-based approach.

Untreated significant carotid disease can lead to stroke. The decision to intervene balances that risk against the risks of the procedure itself, which include stroke, bleeding, cranial nerve injury, arterial damage and heart complications.

After treatment, follow-up usually includes repeat carotid ultrasound, review of medications and monitoring for new neurological symptoms. Any recurrence of stroke warning signs is an emergency, whatever treatment has been performed.

Helpful questions include how severe the narrowing is, whether it has caused symptoms, and how much a procedure would actually reduce your individual stroke risk compared with medical treatment alone.

It is also worth asking how endarterectomy, stenting and TCAR compare for your anatomy, what the procedural risks are, how soon after symptoms treatment should occur, and what follow-up scanning is planned. Bring your imaging results and a current medication list.

The percentage of narrowing on a scan is only part of the picture. Recent symptoms, plaque behaviour, the state of the other carotid artery and your overall health all change the balance between medical therapy and intervention. Decisions about carotid procedures are therefore made jointly, with the reasoning explained rather than assumed.

Yarra Vascular Surgeons offers the full range of carotid care: risk-factor management, duplex ultrasound surveillance, carotid endarterectomy, carotid stenting and TCAR. Recommendations are matched to symptom history, anatomy and individual stroke risk, and urgent symptomatic cases are prioritised in collaboration with stroke physicians.

Carotid narrowing should be assessed in the context of symptoms, plaque characteristics and overall stroke risk. Yarra Vascular Surgeons provides duplex ultrasound assessment and offers medical management, carotid endarterectomy, carotid stenting and TCAR where appropriate. Patients with new facial weakness, speech difficulty, limb weakness or visual loss should call Triple Zero (000) immediately rather than wait for an appointment.