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Directional atherectomy of left main stenoses
S B Laster1, B D Rutherford, D R McConahay
1Mid American Heart Institute, St. Luke's Hospital, Kansas City, MO 64111.
Catheterization and Cardiovascular Diagnosis
|December 1, 1994
Summary
Directional coronary atherectomy (DCA) offers a promising alternative to balloon angioplasty for left main (LM) stenoses. DCA achieved excellent results and superior long-term outcomes in protected LM lesions.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Surgery
Background:
- Left main (LM) stenoses treated with balloon angioplasty (PTCA) often experience clinical restenosis.
- Directional coronary atherectomy (DCA) may offer improved outcomes for specific LM lesion types.
Purpose of the Study:
- To evaluate the acute and long-term efficacy of DCA in patients with protected LM lesions.
- To compare DCA outcomes with historical PTCA data for LM stenosis.
Main Methods:
- Retrospective analysis of 24 DCA procedures in 22 patients with protected LM lesions.
- Assessment of acute procedural success (residual stenosis < 40%) and complications.
- Long-term follow-up for clinical restenosis, survival, and event-free survival.
Main Results:
- Overall acute success rate of 88%, with 100% success in planned procedures.
- Mean LM stenosis reduced from 86% to 13% (P < 0.01).
- At 24 months, restenosis was 16%, survival 100%, and event-free survival 89%.
Conclusions:
- DCA achieves excellent angiographic results with low complication rates in protected LM lesions.
- DCA can be effective when PTCA results are suboptimal.
- DCA may offer superior long-term clinical outcomes compared to balloon angioplasty for LM stenosis.