Effects Of Atorvastatin On Macrophage Activity And Plaque Inflammation Using Magnetic Resonance Imaging
A new way of scanning narrowing in the arteries (main blood vessels) caused by fatty deposits known as plaques has been developed. Heart attacks and strokes occur when plaques become inflamed, depending on the artery affected. Currently used clinical tests can only tell us how much the vessel is blocked by the plaque and not how inflamed (i.e. dangerous) it is. This new method of scanning using magnetic resonance imaging (MRI) and a special agent called Sinerim can identify inflamed plaques. This study will evaluate patients with plaques in their arteries in their neck at risk of strokes to see whether treatment with a cholesterol-lowering drug called atorvastatin can reduce the amount of inflammation within the artery wall within the first three months of treatment. If this effect can be measured using MRI scanning with the use of Sinerim then the results of this study will provide additional clinical validation of the use of MRI scanning combined with agents such as Sinerem®.
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Primary Purpose: Treatment
|Official Title:||A 12 Week, Randomised, Double Blind Study Evaluating the Effects of Low Dose (10mg) and High Dose (80mg) Atorvastatin on Macrophage Activity and Carotid Plaque Inflammation as Determined by Ultra Small Super-Paramagnetic Iron Oxide (USPIO) Enhanced Carotid Magnetic Resonance Imaging (MRI)|
- Changes from baseline in USPIO-enhanced MRI signal in carotid plaques at 6 weeks and 12-weeks in low and high dose atorvastatin groups (within groups' comparison).
- Baseline corrected changes in USPIO-enhanced MRI signal in carotid plaques.Changes from baseline in tensile stress, micro-emboli counts, soluble plasma biomarkers at 12 weeks in low and high dose atorvastatin groups.
|Study Start Date:||July 2006|
|Study Completion Date:||August 2007|
|Primary Completion Date:||August 2007 (Final data collection date for primary outcome measure)|