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Simvastatin normalizes qtc dispersion and reduces ventricular electrical instability in isolated hypercholesterolemia
P Gualdiero1, K Esposito, M Ciotola
1Department of Geriatrics and Metabolic Diseases, Second University of Naples, Italy.
Journal of Endocrinological Investigation
|July 12, 2002
Summary
Simvastatin significantly reduced cholesterol and ventricular electrical instability in hypercholesterolemia patients. This suggests simvastatin may lower cardiovascular risk linked to ventricular premature complexes and QTc dispersion.
Area of Science:
- Cardiology
- Pharmacology
- Biochemistry
Background:
- Isolated hypercholesterolemia is a risk factor for cardiovascular disease.
- Ventricular electrical instability, indicated by ventricular premature complexes (VPCs) and QTc dispersion, is associated with increased cardiovascular risk.
- A potential link between elevated cholesterol levels and ventricular electrical instability requires further investigation.
Purpose of the Study:
- To evaluate the relationship between cholesterol levels and ventricular electrical instability.
- To assess the effect of simvastatin on cholesterol levels and markers of ventricular electrical instability in patients with isolated hypercholesterolemia.
Main Methods:
- A randomized, placebo-controlled trial involving 40 subjects with isolated hypercholesterolemia.
- Subjects received either simvastatin 40 mg/day or a placebo for 3 months.
- Measurements included total cholesterol, LDL-cholesterol, HDL-cholesterol, QTc dispersion, and ventricular premature complexes (VPCs).
Main Results:
- Simvastatin treatment significantly decreased total and LDL-cholesterol, and increased HDL-cholesterol.
- Simvastatin also led to significant reductions in QTc dispersion and VPCs.
- No significant changes were observed in the placebo group.
- Baseline cholesterol levels correlated with VPCs and QTc dispersion.
- Reductions in cholesterol levels post-treatment correlated with decreased VPCs and QTc dispersion.
Conclusions:
- Simvastatin effectively improves lipid profiles and reduces ventricular electrical instability in patients with isolated hypercholesterolemia.
- These findings suggest that simvastatin may mitigate cardiovascular risk associated with ventricular electrical instability in this patient population.