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A Rabbit Venous Interposition Model Mimicking Revascularization Surgery using Vein Grafts to Assess Intimal Hyperplasia under Arterial Blood Pressure
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The risk factors for radial artery and saphenous vein graft occlusion are different

Ramez Bahar1, Stig E Hermansen1, Øystein Dahl-Eriksen2

  • 1Department of Cardiothoracic and Vascular Surgery and Department of Cardiology, University Hospital North Norway, Tromsø, Norway.

Scandinavian Cardiovascular Journal : SCJ
|June 2, 2022
PubMed

Insights

Radial artery graft failure after coronary artery bypass grafting (CABG) is linked to systemic inflammation and hypertension. Saphenous vein graft occlusion is primarily associated with tobacco smoking long-term post-CABG.

Area of Science:

  • Cardiovascular Surgery
  • Vascular Biology
  • Graft Patency Research

Background:

  • Coronary artery bypass grafting (CABG) outcomes depend on graft longevity.
  • Understanding risk factors for radial artery and saphenous vein graft occlusion is crucial for long-term patient management.

Purpose of the Study:

  • To identify risk factors associated with radial artery and saphenous vein graft occlusion.
  • To analyze conduit longevity in patients undergoing CABG with these grafts.

Main Methods:

  • A cohort of 119 patients receiving radial artery grafts (76 also with saphenous vein grafts) underwent angiography and assessments 7.6-12.1 years post-CABG.
  • Parameters analyzed included anthropometrics, biochemistry, endothelial function, comorbidity, medication, and smoking habits.
  • Univariable and multivariable logistic regression models were used to analyze associations with graft patency.

Main Results:

  • Higher high-sensitive C-reactive protein levels were associated with radial artery graft occlusion.
  • Pharmacologically treated hypertension correlated with better radial artery graft patency.
  • Tobacco smoking was the sole independent risk factor for saphenous vein graft occlusion 8-12 years postoperatively.

Conclusions:

  • Radial artery and vein graft failure have distinct pathogenic mechanisms.
  • Hypertension and systemic inflammation are key factors in radial artery graft failure, suggesting targets for prevention.
  • Findings support personalized secondary prevention strategies for CABG patients.

Keywords:
Coronary artery bypass grafting (CABG)graft diseaseischemic heart diseaseradial arterysaphenous vein

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