Statins for Stroke Prevention

Indications for Statin Therapy

The European Society of Cardiology recommends statins should be initiated in all patients with established atherosclerotic disease and in patients at high risk for developing cardiovascular disease for primary stroke prevention 1
The European Society of Cardiology recommends that after a cerebrovascular event, statins should be started in patients with a history of non-cardioembolic ischemic stroke or transient ischemic attack for prevention of further cardiovascular events 1, 2
The European Society of Cardiology recommends statins should be avoided following hemorrhagic stroke unless there is evidence of atherosclerotic disease or high CVD risk 1, 2

High-dose atorvastatin (80 mg daily) is indicated for patients with ischemic stroke with no known coronary heart disease, no major cardiac sources of embolism, and high cholesterol levels to reduce risk of stroke recurrence 3, 4
The American Heart Association recommends lipid-lowering therapy with a statin and ezetimibe (if needed) to a goal low-density lipoprotein cholesterol of <70 mg/dL for patients with ischemic stroke or transient ischemic attack and atherosclerotic disease 3, 4

The SPARCL trial demonstrated that high-dose atorvastatin reduced stroke recurrence by 16% compared to placebo over 4.9 years 5, 6
The 5-year absolute risk reduction for major cardiovascular events was 3.5% with atorvastatin (HR, 0.80; 95% CI, 0.69 to 0.92; p=0.002) 5, 6

There was a higher incidence of hemorrhagic stroke in the atorvastatin treatment arm in SPARCL (2.3% vs 1.4% for placebo; HR, 1.66; 95% CI, 1.08 to 2.55) 5, 7
Risk factors for hemorrhagic stroke with atorvastatin include previous hemorrhagic stroke (HR, 5.65; 95% CI, 2.82 to 11.30) 6
Statin therapy is generally well tolerated, with a mildly increased rate of elevated liver enzymes and creatine kinase 1

Check lipid levels 4-12 weeks after initiating statin therapy and every 3-12 months thereafter to assess adherence and efficacy 3, 4
For patients who experienced an acute coronary syndrome, blood lipids should be checked 4-6 weeks after the event to determine whether the target level has been reached 1, 2

The American Heart Association/American Stroke Association recommends high-intensity statin therapy for patients with stroke or TIA attributable to 50-99% stenosis of a major intracranial artery, with a Class I, Level B-NR recommendation for maintenance of high-intensity statin therapy 8
Patients with ischemic stroke and intracranial arterial stenosis, including PICA, should receive high-intensity statin therapy as part of aggressive medical management, as recommended by the American Heart Association/American Stroke Association 9, 8

Atorvastatin 80 mg daily is the evidence-based dose for patients with ischemic stroke and no known coronary disease, demonstrated to reduce stroke recurrence by 16% in the SPARCL trial, as supported by the American College of Cardiology 10
Rosuvastatin 20 mg daily is an alternative high-intensity option for patients with ischemic stroke and intracranial arterial stenosis, including PICA 11

The target LDL-C should be <70 mg/dL for patients with atherosclerotic intracranial stenosis, as recommended by the American Heart Association/American Stroke Association 10
Post hoc analyses from WASID and SAMMPRIS show that lower LDL levels are associated with lower vascular event rates in patients with intracranial atherosclerotic stenosis, with a strength of evidence supported by recent RCT data 9

The Taiwan guidelines recommend statins for intracranial arterial stenosis, with monitoring of atherosclerosis progression, with a Class I, Level B recommendation 12, 13
The Thailand guidelines recommend high-dose statins for ischemic stroke presumed due to atherosclerosis, with a Class IIa-B recommendation 12, 14

Blood pressure control to <140/90 mm Hg is recommended, though some patients with severe stenosis may require individualized targets, as supported by the American Heart Association/American Stroke Association 9
Dual antiplatelet therapy, such as aspirin plus clopidogrel, is recommended for up to 90 days in severe stenosis, then single agent, as supported by the American Heart Association/American Stroke Association 8

The American Heart Association recommends dietary modifications, including <7% calories from saturated fat and cholesterol <200 mg/day, as an adjunct to statin therapy for patients with elevated lipid levels 15
The European Heart Journal suggests that statins must be started in all patients with non-cardioembolic ischemic stroke for prevention of further cardiovascular events, with evidence showing that delaying statin therapy increases morbidity and mortality risk 16

For patients with ischemic stroke and atherosclerotic disease, therapeutic lifestyle changes are recommended for triglycerides <200 mg/dL, with high-dose atorvastatin also lowering triglycerides as a secondary benefit 15
The American College of Cardiology recommends targeting LDL-C <70 mg/dL for patients with ischemic stroke and atherosclerotic disease, based on evidence showing that lower LDL levels are associated with lower vascular event rates 15

The European Heart Journal recommends checking baseline liver enzymes and creatine kinase before starting high-dose atorvastatin, and monitoring for muscle symptoms and liver enzymes as needed 16
The American Diabetes Association notes that adding fenofibrate to simvastatin in diabetic patients did not reduce cardiovascular events, and fibrate therapy is not indicated unless triglycerides are ≥200 mg/dL and remain elevated despite statin therapy 17

The European Heart Journal recommends an LDL-C reduction of ≥50% from baseline for very high-risk patients with established CVD, with a target LDL-C <70 mg/dL 18
For patients with diabetes and prior stroke, the American Diabetes Association and American College of Cardiology recommend high-intensity statin therapy, targeting LDL-C <70 mg/dL 18

The American College of Cardiology recommends continuing or initiating high-intensity statin for secondary prevention after ischemic stroke in older adults (≥76 years), as they have established CVD 18
For patients with diabetes and prior stroke, the American Diabetes Association recommends targeting LDL-C <70 mg/dL with high-intensity statin therapy 18