Usefulness of fish oil supplements in preventing clinical evidence of restenosis after percutaneous transluminal coronary angioplasty

Am J Cardiol. 1989 Aug 1;64(5):294-9. doi: 10.1016/0002-9149(89)90522-5.


This study assesses the effect of dietary supplements with high dose omega-3 fatty acid (N3FA) on the frequency of clinical restenosis during the 6 months after successful percutaneous transluminal coronary angioplasty (PTCA). One hundred ninety-four patients (214 significant coronary narrowings) were randomized after successful PTCA to receive conventional medical therapy or to an identical regimen supplemented by high dose N3FA (4.5 g/day). Enrollment required angina pectoris and successful dilatation of all significant coronary narrowings. The subjects were randomly assigned to either no N3FA (control, n = 99) or N3FA supplementation (n = 95). After a 1-week trial period, 11 (group 2) declined further treatment because of side effects. The remaining 84 subjects (group 1) continued N3FA throughout the 6-month period. Monthly clinical follow-up was obtained in all patients. Ninety-two percent of patients had cardiac testing for evaluation of recurrent ischemia. Except for a greater percentage of women in the group refusing N3FA supplementation (group 2), the 3 groups were similar in demographic data, medical history, dietary habits, history of previous PTCA and angiographic characteristics. Of the 194 subjects, 56 had clinical restenosis (45 by cardiac catheterization, 8 by exercise testing and 3 by symptoms alone [refused further clinical testing]). Reocclusion rates were: group 1 19%, group 2 46%, and control 35%. Analysis both in accordance with the principle of intention to treat and for subjects who actually received N3FA revealed a significant effect of N3FA on preventing clinical restenosis (p less than 0.04 and p = 0.008, respectively). These data suggest that high dose N3FA supplements reduce the clinical restenosis rate after successful PTCA.

Publication types

  • Clinical Trial
  • Comparative Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Angiography
  • Angioplasty, Balloon*
  • Clinical Trials as Topic
  • Constriction, Pathologic / therapy
  • Coronary Angiography
  • Coronary Disease / therapy*
  • Fatty Acids, Unsaturated / therapeutic use*
  • Female
  • Fish Oils / therapeutic use*
  • Follow-Up Studies
  • Humans
  • Male
  • Middle Aged
  • Random Allocation
  • Recurrence


  • Fatty Acids, Unsaturated
  • Fish Oils