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Published on: May 14, 2013
Statin therapy is associated with improved patency of autogenous infrainguinal bypass grafts
Thomas A Abbruzzese1, Joaquim Havens, Michael Belkin
1Division of Vascular Surgery, Department of Surgery, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA.
Insights
Statin therapy significantly improves graft patency in patients undergoing infrainguinal bypass surgery. This HMG-CoA reductase inhibitor use enhances secondary graft patency, reducing failure risk in vascular reconstructions.
Area of Science:
- Vascular Surgery
- Cardiovascular Research
- Pharmacology
Background:
- HMG-CoA reductase inhibitors (statins) offer cardiovascular benefits beyond cholesterol reduction, including anti-inflammatory and antiproliferative effects.
- Understanding the impact of statins on vascular graft outcomes is crucial for improving patient care.
Purpose of the Study:
- To investigate the influence of statin therapy on graft patency following autogenous infrainguinal arterial reconstructions.
Main Methods:
- Retrospective analysis of 172 patients undergoing 189 primary autogenous infrainguinal bypass grafts (1999-2001).
- Patients categorized into statin users (n=94) and control group (n=95).
- Graft patency, limb salvage, and survival analyzed using log rank test and Cox proportional hazards analysis.
Main Results:
- No significant difference in primary patency, limb salvage, or survival at 2 years between statin and control groups.
- Statin therapy was associated with significantly higher primary-revised (94% vs 83%) and secondary (97% vs 87%) graft patency rates at 2 years (P <.02).
- Statin use was the only factor independently associated with improved secondary graft patency (P =.03), reducing graft failure risk 3.2-fold.
Conclusions:
- Statin therapy is linked to enhanced graft patency in autogenous infrainguinal bypass grafting using saphenous vein.
- These findings highlight the potential benefits of statins in maintaining vascular graft function.
Objective:
HMG-CoA reductase inhibitors (statins) broadly reduce cardiovascular events, effects that are only partly related to cholesterol lowering. Recent studies suggest important anti-inflammatory and antiproliferative properties of these drugs. The purpose of this study was to determine the influence of statin therapy on graft patency after autogenous infrainguinal arterial reconstructions.
Methods:
A retrospective analysis of consecutive patients (1999-2001) who underwent primary autogenous infrainguinal reconstructions with a single segment of greater saphenous vein was performed. Patients were categorized according to concurrent use of a statin. Graft lesions (identified by duplex surveillance) and interventions were tabulated. Comparisons between groups were made by using the Fisher exact test for categorical variables and the Student t test for continuous variables. Patency, limb salvage, and survival were compared by log rank test. A stepwise Cox proportional hazards analysis was then employed to ascertain the relative importance of factors influencing graft patency.
Results:
A total of 172 patients underwent 189 primary autogenous infrainguinal arterial reconstructions (94 statin, 95 control) during the study period. The groups were well matched for age, indication, and atherosclerotic risk factors. Procedures were performed primarily for limb salvage (92%), with 65% to an infrapopliteal target. Perioperative mortality (2.6%) and major morbidity (3.2%) were not different between groups. There was no difference in primary patency (74% +/- 5% vs 69% +/- 6%; P =.25), limb salvage (92% +/- 3% vs 90% +/- 4%; P =.37), or survival (69% +/- 5% vs 63% +/- 5%; P =.20) at 2 years. However, patients on statins had higher primary-revised (94% +/- 2% vs 83% +/- 5%; P <.02) and secondary (97% +/- 2% vs 87% +/- 4%; P <.02) graft patency rates at 2 years. Of all factors studied by univariate analysis, only statin use was associated with improved secondary patency (P =.03) at 2 years. This was confirmed by multivariate analysis. The risk of graft failure was 3.2-fold higher (95% confidence interval, 1.04-10.04) for the control group. Perioperative cholesterol levels (available in 47% of patients) were not statistically different between groups.
Conclusions:
Statin therapy is associated with improved graft patency after infrainguinal bypass grafting with saphenous vein.
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