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Published on: November 11, 2022
A systematic review of the time course of atherosclerotic plaque regression
Adam M Noyes1, Paul D Thompson2
1Department of Medicine, University of Connecticut Medical School, Farmington, CT, USA.
Insights
Lipid-lowering therapy, particularly statins, takes about 20 months to significantly regress atherosclerotic plaques. This evidence supports prolonged treatment before considering statin dose reduction.
Area of Science:
- Cardiovascular Medicine
- Pharmacology
- Medical Research
Background:
- Atherosclerotic plaque instability, driven by cholesterol content, is a primary cause of acute cardiac events.
- Systematic review of literature on atherosclerosis regression is crucial for understanding plaque dynamics.
- Identifying timelines for plaque regression informs clinical decisions regarding lipid-lowering therapy adjustments.
Purpose of the Study:
- To determine the average time required for lipid-lowering treatment to induce atherosclerotic plaque regression.
- To establish a timeframe for plaque regression and stabilization based on existing literature.
- To provide evidence-based guidance for managing statin therapy in patients with side effects or discontinuation reasons.
Main Methods:
- A comprehensive PubMed search was conducted to identify relevant English-language studies on atherosclerotic regression.
- Selected articles reporting on plaque regression rates and outcomes were systematically reviewed.
- Data from studies documenting plaque regression with statin therapy were analyzed.
Main Results:
- Out of 189 identified articles, 50 provided sufficient data on regression rates.
- Thirty-one studies demonstrated plaque regression in carotid, coronary, and aortic vascular beds following statin therapy.
- Plaque regression was observed after an average treatment duration of 19.7 months.
Conclusions:
- Statin therapy demonstrated plaque regression in documented studies after an average of 19.7 months.
- Patients may require approximately two years of intensive lipid reduction before considering a decrease in statin therapy intensity.
- This timeframe suggests a need for sustained lipid management to achieve significant atherosclerotic plaque regression.
Objective:
We sought to determine the time required for lipid treatment to produce regression of atherosclerotic plaques.
Background:
The cholesterol content of atherosclerotic plaques contributes to their instability, and most acute cardiac events including myocardial infarction and sudden death are produced by coronary plaque disruption. We systematically reviewed the literature on atherosclerosis regression to identify the time required for cholesterol egress, plaque regression, and possible plaque stabilization. Such information may help decide when patients with statin side effects or other reasons for statin discontinuation could consider a reduction in the intensity of treatment.
Methods:
We performed a PubMed search to identify English language articles reporting atherosclerotic regression. Articles pertinent to the topic were reviewed in detail.
Results:
We identified 189 articles, 50 of which provided sufficient information to establish a rate of regression and 31 of which demonstrated plaque regression with statin therapy in the carotid (n = 11), coronary (n = 16), and aortic (n = 4) vascular beds. Plaque regression occurred after an average of 19.7 months of treatment.
Conclusion:
Regression of atherosclerotic plaque using statin therapy in those studies documenting regression occurred after an average time of 19.7 months. This suggests that patients should undergo approximately two years of aggressive lipid reduction before considering a reduction of statin therapy.
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