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Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders
Published on: August 18, 2016
Rationale for ACE inhibition as an anti-ischaemic therapy
1University of Florida College of Medicine, Gainesville 32610-0277, USA.
Insights
Angiotensin-converting enzyme (ACE) inhibition with quinapril improves endothelial function in patients with coronary artery disease. This cardiovascular disease treatment also reduces atherosclerosis progression and reverses smoking-induced endothelial damage.
Area of Science:
- Cardiovascular Medicine
- Pharmacology
Background:
- Endothelial dysfunction is a key factor in cardiovascular diseases.
- Tissue angiotensin-converting enzyme (ACE) significantly influences endothelial function and disease progression.
- Previous studies show ACE inhibition benefits patients with myocardial ischemia and left ventricular dysfunction.
Purpose of the Study:
- To investigate the effects of ACE inhibition with quinapril on endothelial function in patients with coronary artery disease and preserved left ventricular function.
- To assess quinapril's impact on coronary atherosclerosis progression and smoking-related endothelial dysfunction.
Main Methods:
- Clinical studies evaluating ACE inhibition.
- Assessment of endothelial function in large and small vessels.
- Monitoring of coronary atherosclerosis progression in patients with hyperlipidemia.
- Evaluation of quinapril's effects on endothelial function in smokers.
Main Results:
- Quinapril improves endothelial function in both large and small vessels.
- Quinapril inhibits coronary atherosclerosis progression in patients with high LDL cholesterol.
- Quinapril reverses the adverse effects of smoking on endothelial function.
- ACE inhibition demonstrates potential anti-ischemic effects.
Conclusions:
- ACE inhibition with quinapril offers significant benefits for endothelial function in coronary artery disease patients with preserved left ventricular function.
- Quinapril is effective in managing atherosclerosis and mitigating smoking-related endothelial damage.
- Further research, like the QUINapril Anti-ischaemia and Symptoms of Angina Reduction trial, is ongoing to fully define quinapril's role in managing ischemia.
Abstract:
Research has established endothelial dysfunction as a pathophysiological mechanism underlying many cardiovascular disease processes. Tissue angiotensin-converting enzyme (ACE) plays a central role in regulating processes that contribute to endothelial function and cardiovascular disease. A number of large clinical studies have demonstrated conclusively the beneficial effects of ACE inhibition in patients with myocardial ischaemia and left ventricular dysfunction, including a significant reduction in the risk of recurrent myocardial infarction. Mechanistic findings from these studies indicated that the beneficial effects of ACE inhibition would extend to patients with preserved left ventricular function. Available results suggest that ACE inhibition with quinapril improves endothelial function in large and small vessels in patients with coronary artery disease and preserved left ventricular function. Quinapril also inhibits progression of coronary atherosclerosis in patients with high levels of low-density lipoprotein cholesterol (> or = 130 mg.dl-1) and reverses the toxic effects of smoking on endothelial function. Endothelial dysfunction also may be an important mechanism in episodes of angina and silent ischaemia. The central role of tissue ACE in endothelial function suggests that ACE inhibition has antiischaemic effects. A study in progress, the QUinapril Antiischaemia and Symptoms of Angina Reduction trial, addresses shortcomings in earlier studies of ACE inhibition for ischaemia and is expected to define the role of quinapril in ischaemia.
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