Management of Carotid Dissection

Diagnostic Confirmation

The American Heart Association recommends obtaining CT angiography (CTA), MR angiography (MRA), or catheter-based contrast angiography immediately to confirm the diagnosis, as these modalities have Class I recommendation for diagnosing cervical artery dissection 1, 2, 3
CTA is preferred as the initial imaging modality with high sensitivity for detecting carotid dissection and can visualize the entire vessel from aortic arch to intracranial segments 4
Vascular imaging should look specifically for dissection flap, differential flow in true and false lumens, intramural hematoma, and pseudoaneurysm formation 4
Concurrent brain imaging (MRI or CT) should be performed to assess for acute ischemic complications, as a significant percentage of patients develop cerebral or retinal ischemia after initial warning symptoms 3, 4

The American College of Cardiology recommends initiating antithrombotic treatment immediately for 3-6 months using either anticoagulation (heparin followed by warfarin) or antiplatelet therapy (aspirin, clopidogrel, or aspirin-dipyridamole combination) 1, 2
Anticoagulation with heparin or low-molecular-weight heparin, then transition to warfarin for 3-6 months, yields a stroke/death rate of 1% at 3 months and 1.6% at 1 year 1, 2, 3, 5
Antiplatelet therapy with aspirin, clopidogrel, or extended-release dipyridamole plus aspirin yields a stroke/death rate of 2% at 3 months and 3.2% at 1 year 1, 2, 3, 5

The American Heart Association recommends transitioning all patients to long-term antiplatelet therapy with aspirin or clopidogrel after completing the initial 3-6 month treatment period 3, 5
Long-term antiplatelet therapy should be continued indefinitely for secondary stroke prevention 3

The American Heart Association recommends controlling hypertension to maintain blood pressure below 140/90 mm Hg in patients with underlying vascular disease 6
The safety and effectiveness of beta-blockers, angiotensin inhibitors, or non-dihydropyridine calcium channel blockers to reduce arterial wall stress are not well established (Class IIb evidence) 1, 2, 3

The American College of Radiology recommends performing non-invasive imaging (CTA or MRA) of the extracranial carotid arteries at 1 month, 6 months, and annually to monitor vessel healing and assess patency 3, 5

The American College of Cardiology recommends reserving carotid angioplasty and stenting exclusively for patients with persistent or recurrent ischemic symptoms despite optimal antithrombotic therapy (Class IIb recommendation) 1, 2, 4, 5
Endovascular complications include periprocedural neurological complications and restenosis at 12 months 5

The American College of Cardiology recommends initiating statin therapy to reduce LDL cholesterol below 100 mg/dL (or below 70 mg/dL if ischemic stroke occurred) 6
Smoking cessation should be advised if applicable 6
Carotid dissection may be associated with fibromuscular dysplasia, connective tissue disorders, or other underlying arterial disease 1, 2