Statins for secondary stroke prevention in patients without known coronary heart disease: the jury is still out.
Explore the source record for details and available documents.
Coronary Disease↗
Biomedical subjects
Alfred S Callahan
Publications and source records attributed to Alfred S Callahan.
Factors influencing outcome and treatment effect in PROACT II.
BACKGROUND AND PURPOSE: The PROACT II study demonstrated a significant benefit from treatment with intra-arterial pro-urokinase (r-proUK) in patients with middle cerebral artery occlusion treated within 6 hours of stroke onset. The purpose of the current study was to examine baseline factors to determine predictors of good outcome and response to treatment. METHODS: We selected from the baseline clinical, radiologic, and angiographic data variables that considered possibly related to outcome. A univariate analysis was performed to examine the association between these baseline factors and good outcome, defined as a modified Rankin scale score <or=2. A multivariate model then selected the most important variables independently influencing prognosis. A risk score for each patient was constructed on the basis of the patient's individual values for each independent variable. Patients were stratified into risk quartiles based on their risk scores, and an odds ratio for each risk quartile was calculated. The treatment effects of each quartile were compared. RESULTS: In the univariate analysis, screening National Institutes of Health stroke scale (NIHSS) score and age were strongly associated with good outcome. The multivariate model selected age, NIHSS score, and CT hypodensity as the most important prognostic variables. Dividing patients into quartiles based on risk scores achieved a uniform gradient of probability of good outcomes. A trend toward benefit of r-proUK treatment was seen in all risk quartiles, and no differential treatment effect was observed across risk groups. CONCLUSIONS: There was no evidence of differential effect of r-proUK across subgroups of patients stratified by risk.
Adult↗
Design and baseline characteristics of the stroke prevention by aggressive reduction in cholesterol levels (SPARCL) study.
Evidence suggests that statin therapy reduces the risk of stroke in patients with coronary heart disease (CHD), but its benefit for patients with cerebrovascular disease and no history of CHD remains uncertain. The Stroke Prevention by Aggressive Reduction in Cholesterol Levels (SPARCL) Study is a prospective, multi-centre, double-blind, randomised, placebo-controlled trial designed to evaluate the effects of atorvastatin 80 mg/day in patients who previously experienced a stroke or transient ischaemic attack, but who have no known CHD. A total of 4732 patients have been enrolled, and the data collection phase of the study is expected to be completed by October 2004. SPARCL is the first study primarily designed to prospectively evaluate the effect of statin treatment in secondary stroke prevention.
Adult↗
Long-term therapy to prevent stroke.
Cerebrovascular disease is the third leading cause of mortality and the leading cause of long-term neurological disability in the United States. Most strokes are of ischemic origin and, other than cardioembolic or small vessel strokes, are caused by the development of platelet-fibrin thrombi on an atherosclerotic plaque. This underlying disease mechanism shares important features with coronary artery disease and peripheral artery disease, highlighting the systemic nature of atherothrombosis and the elevated cross risk in stroke patients for ischemic events in other vascular beds. It has been estimated that up to 80% of ischemic strokes could be prevented with application of currently available treatments for blood pressure, cholesterol, and antithrombotic therapies. Stroke is not, like cancer, waiting for a scientific breakthrough; stroke preventive treatments are well understood and widely available. It is only the application of these treatments to patients, many of whom do not visit physicians, that is lacking. Clearly, better education of the public and active participation of primary care physicians is essential to get the message out to all those at risk.
Anticoagulants↗