Related Experiment Videos
[Treatment of risk factors of coronary atherosclerosis]
Insights
Aggressively managing cholesterol is crucial for preventing heart attacks after a cardiac event. Lowering cholesterol, especially with medication, significantly reduces heart disease mortality, even with moderate levels.
Area of Science:
- Cardiology
- Preventive Medicine
- Atherosclerosis Research
Context:
- Secondary prevention of myocardial infarction (MI) requires prompt treatment of risk factors during the acute phase.
- Hypercholesterolemia is a primary causal factor in atherosclerosis, with its relative cardiovascular risk unchanged post-MI.
- Absolute cardiovascular risk increases post-MI due to higher ischemic event prevalence.
Purpose:
- To emphasize the critical role of treating coronary atherosclerosis risk factors for secondary MI prevention.
- To highlight the established benefits of cholesterol reduction on cardiovascular mortality.
- To discuss the impact of other risk factors like hypertension, smoking, diabetes, and lifestyle.
Summary:
- Cholesterol reduction, particularly via statin therapy, significantly decreases cardiovascular mortality post-MI, with benefits proportional to baseline levels and reduction achieved.
- A 1% decrease in total cholesterol correlates with a 2.5% reduction in coronary mortality, underscoring the efficacy of lipid-lowering interventions.
- While hypertension control benefits are less definitive, managing blood pressure is recommended. Smoking cessation is vital for primary prevention, and addressing diabetes, sedentary behavior, and psychological factors is also advised.
Impact:
- Establishes cholesterol management as a cornerstone of post-MI care, directly impacting mortality rates.
- Provides evidence for the superiority of pharmacological over dietary interventions for cholesterol reduction in high-risk patients.
- Advocates for a personalized, multifactorial risk management approach for cardiovascular disease prevention and secondary prevention.
Abstract:
The treatment of coronary atherosclerosis risk factors is an essential part of secondary prevention of myocardial infarction. This should be started during the acute phase. Hypercholesterolemia is the principal causal factor and the occurrence of an infarct does not change the relative cardiovascular risk attributable to this factor. The absolute risk, positively correlated to total and LDL cholesterol and negatively to HDL cholesterol, is increased after myocardial infarction because of the higher prevalence of lethal or non-lethal ischemic cardiac events. The benefits of cholesterol reduction on cardiovascular mortality have been clearly established. They are greater with cholesterol-lowering drugs than with diet alone, and all the more significant when the initial cholesterol levels are high, but they are present at every value. A 1% reduction in total cholesterol is associated with a 2.5% reduction in coronary mortality both in secondary and primary prevention. After infarction, the cardiovascular benefits greatly exceed the risk of overmortality from other causes. Therapeutic effects may also be demonstrated by non-progression or regression of stenotic coronary lesions. The benefits of hypertension control are not as evident. Diastolic blood pressures inferior to 85 mmHg are associated with an increased coronary risk. While waiting for the results of specific therapeutic trials, reduction of high blood pressure without excessive lowering of the diastolic pressure is recommended. Stopping smoking is a measure of primary prevention which reduces the number of acute coronary events and of sudden deaths. However, the correlation with atherosclerosis is not remarkable. Treating diabetes, sedentarity and psychological behaviour seems to be useful. An evaluation of a personalized multifactorial approach to individual risk should be performed.