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CABG after successful PTCA: a case-control study

R G Johnson1, C Sirois, J F Watkins

  • 1Department of Surgery, Beth Israel Hospital, Boston, MA 02215, USA.

The Annals of Thoracic Surgery
|June 1, 1995
PubMed
Summary
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Patients needing coronary artery bypass grafting after percutaneous transluminal coronary angioplasty often have more severe coronary artery disease. This highlights key predictors for subsequent operative revascularization following initial angioplasty.

Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Vascular Surgery

Background:

  • Percutaneous transluminal coronary angioplasty (PTCA) is a common procedure for coronary artery disease.
  • Identifying patients who require subsequent coronary artery bypass grafting (CABG) after successful PTCA is crucial for optimizing treatment strategies.

Purpose of the Study:

  • To identify patient and angiographic characteristics that predict the need for operative revascularization (CABG) after a successful PTCA.

Main Methods:

  • A matched case-control study comparing 128 patients who underwent CABG after PTCA with 128 controls who did not.
  • Matching was based on the date of initial PTCA.
  • Pre-PTCA clinical and angiographic data were analyzed.

Main Results:

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  • Diabetes mellitus was more prevalent in patients requiring subsequent CABG (p = 0.009).
  • Cases had a higher mean number of total coronary lesions (4.1 vs 3.3; p = 0.002) and more severe stenoses (≥70%) in the left anterior descending and circumflex arteries.
  • A greater number of lesions were successfully dilated in the CABG group (2.4 vs 1.7; p = 0.0001).
  • Five-year survival was lower in the CABG group (87.9%) compared to controls (94.5%; p = 0.048).

Conclusions:

  • Patients requiring CABG after PTCA often present with more extensive and severe coronary artery disease.
  • Predictive markers include diabetes, a higher number of coronary lesions, and specific arterial stenoses.
  • These findings aid in stratifying risk for patients undergoing initial PTCA.