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Serum lipids and restenosis after successful percutaneous transluminal coronary angioplasty. Ichilov Magnesium Study
1Department of Cardiology, Tel-Aviv Sourasky Medical Center, Sackler School of Medicine, Tel-Aviv University, Israel.
Insights
Low high-density lipoprotein (HDL) cholesterol may be linked to restenosis after coronary angioplasty. While lipid levels didn't predict restenosis, low HDL levels showed an association. Further research is needed to understand this relationship.
Area of Science:
- Cardiology
- Interventional Cardiology
- Lipid Metabolism
Background:
- Coronary angioplasty is a common procedure to treat coronary artery disease.
- Restenosis, or re-narrowing of the artery, remains a significant complication after angioplasty.
- The role of plasma lipids in predicting restenosis is not fully understood.
Purpose of the Study:
- To prospectively examine the effects of plasma lipids on clinical and angiographic outcomes after coronary angioplasty.
- To identify predictors of restenosis following the procedure.
- To investigate the relationship between lipid profiles and the tendency for restenosis.
Main Methods:
- Prospective examination of 134 patients (157 vessels) undergoing coronary angioplasty.
- Angiographic assessment for restenosis at 6-month follow-up.
- Analysis of clinical, biochemical (total cholesterol, HDL, LDL, triglycerides), and angiographic variables.
Main Results:
- Restenosis was detected in 29% of patients (45 vessels) at 6 months.
- No clinical, biochemical, or angiographic variables predicted restenosis; it was lesion-related.
- A trend for increased restenosis was observed in patients with low high-density lipoprotein (HDL) cholesterol (< or = 40 mg/dl) compared to those with higher HDL levels (30% vs 19%, p=0.092).
- No significant differences in restenosis rates were found based on total or low-density lipoprotein (LDL) cholesterol levels.
- Lipid levels during follow-up showed similar changes in patients with and without restenosis.
Conclusions:
- Plasma lipid levels at the time of angioplasty and during follow-up did not predict restenosis.
- The tendency for restenosis was lesion-related, not patient-dependent.
- The association between low HDL cholesterol and a higher tendency for restenosis warrants further investigation.
Abstract:
The effects of plasma lipids on the clinical and angiographic parameters of 134 patients, in whom coronary angioplasty was performed in 157 vessels, were prospectively examined. During a 6-month follow-up, restenosis was detected angiographically in 39 patients (29%; 45 vessels). None of the clinical, biochemical, or angiographic variables examined was predictive of stenosis and the tendency of a vessel to restenose was not patient-dependent but rather lesion-related. However, restenosis developed in 31 of 102 vessels (30%) in patients with high-density lipoprotein (HDL) cholesterol < or = 40 mg/dl, compared with restenosis in 10 of 55 vessels (19%) in patients with HDL cholesterol > 40 mg/dl (p = 0.092). No significant differences were observed when restenosis rates were compared in patients with total cholesterol levels > 250 mg/dl or < 250 mg/dl; no differences were seen in low-density lipoprotein (LDL) cholesterol levels when comparing patients with > 160 mg/dl and < 160 mg/dl. In 117 patients (132 vessels), complete serial blood specimens were obtained until the concluding angiography at 6 months. During follow-up, both groups (those with and without restenosis) had almost similar findings. Triglycerides decreased equally in both groups, and total cholesterol increased mildly in those who had restenosis; HDL and LDL cholesterol levels increased significantly in each group. No significant differences were observed with respect to extent of these changes between the groups. Thus, although lipid levels at the time of angioplasty and at 6 months follow-up were not found to predict the occurrence of restenosis, the association of low high-density lipoprotein levels and the tendency for restenosis should not be overlooked.