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[Regression of coronary sclerosis in familial hypercholesterolemia IIa by specific LDL apheresis]
Insights
Specific LDL apheresis significantly improved exercise tolerance and favorably impacted coronary artery stenosis in familial hypercholesteremia type IIa patients. This LDL cholesterol reduction therapy supports the lipid theory of atherosclerosis.
Area of Science:
- Cardiovascular Medicine
- Metabolic Disorders
- Immunology
Context:
- Familial hypercholesteremia type IIa is a genetic disorder leading to severe hypercholesterolemia and premature coronary arteriosclerosis.
- Current treatments often struggle to adequately manage LDL cholesterol levels and slow disease progression.
- Long-term data on the effects of LDL apheresis on established coronary artery disease are limited.
Purpose:
- To evaluate the long-term impact of specific low-density lipoprotein (LDL) plasma immunabsorption on the progression of coronary arteriosclerosis in patients with familial hypercholesteremia type IIa.
- To assess changes in exercise tolerance, ischemic electrocardiographic (ECG) findings, and hemodynamic parameters during LDL apheresis therapy.
- To analyze the morphological changes in coronary arteries, including stenosis progression, arrest, and regression.
Summary:
- Ten patients with familial hypercholesteremia type IIa underwent LDL apheresis, with serial ECG, exercise testing, hemodynamic, and angiographic assessments.
- Significant improvements were observed in exercise tolerance and a marked reduction in ischemic ST-changes.
- LDL apheresis resulted in lasting positive morphological changes in coronary arteries, with stenosis regression or arrest in the majority of evaluated segments.
Impact:
- Demonstrates that specific LDL plasma immunabsorption effectively reduces LDL cholesterol and favorably influences the course of coronary arteriosclerosis in familial hypercholesteremia type IIa.
- Provides evidence supporting the lipid theory of atherosclerosis, particularly in this patient cohort.
- Highlights LDL apheresis as a viable therapeutic option for managing advanced coronary arteriosclerosis in severe hypercholesterolemia.
Abstract:
The long-term effect of specific LDL plasma immunabsorption on the course of coronary arteriosclerosis was tested in ten patients with familial hypercholesteremia type IIa (seven females, three males; age range 15-57 years). Available were ECG, bicycle ergometry, hemodynamic and angiographic data. These tests were repeated seriatim in the course of the LDL immunabsorption. It was found that exercise tolerance markedly increased, ischemic ST-changes became less marked and the initial hemodynamic parameters remained unchanged. The morphology of the coronary arteries was influenced lastingly: among 22 stenoses only one progressed, there was no further progression in 11 stenoses and regression in ten. When there was generalized arteriosclerosis, progression occurred in two of 79 coronary artery segments, progression was arrested in 56 and regression was noted in 21 of 79 segments. These results demonstrate that specific LDL plasma immunabsorption for the elimination of LDL cholesterol favorably influences the course of coronary arteriosclerosis in patients with familial hypercholeremia type IIa. The findings support the lipid theory of atherosclerosis and coronary arteriosclerosis, at least in this special group of patients.