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Predictors for restenosis after angioplasty of chronic coronary occlusions
P A Sirnes1, P Mølstad, Y Myreng
1Feiring Heart Clinic, Norway. psirnes@online.no
Insights
Adding stents after balloon angioplasty significantly reduced restenosis and major adverse clinical events in chronic coronary occlusions. Stenting is recommended for successfully treated chronic occlusions.
Area of Science:
- Interventional Cardiology
- Vascular Medicine
- Cardiovascular Research
Background:
- The Stenting In Chronic Coronary Occlusion (SICCO) study investigated intracoronary stenting post-percutaneous transluminal coronary angioplasty (PTCA) for chronic coronary occlusions.
- Previous findings indicated stenting reduced restenosis rates.
Purpose of the Study:
- To evaluate the impact of additional stenting on restenosis and Major Adverse Clinical Events (MACE) after successful PTCA of chronic coronary occlusions.
- To identify predictors of restenosis and MACE in this patient cohort.
Main Methods:
- Utilized univariate and logistic regression analyses on data from 114 SICCO patients.
- Assessed clinical, angiographic, and procedural predictors for restenosis and MACE over 300 days.
- Defined restenosis as >50% diameter stenosis and MACE as a composite of cardiac death, myocardial infarction, repeat revascularization, or reocclusion.
Main Results:
- Stenting significantly reduced both restenosis (53% vs. lower rate in stented group) and MACE (39% vs. lower rate in stented group) by 6 months.
- Stenting improved restenosis rates even with a 'stentlike' result post-PTCA.
- Multivariate analysis identified unstable angina history, long lesions, and non-tapering stumps as restenosis predictors; LAD location increased MACE risk threefold.
Conclusions:
- Stent implantation is a crucial consideration for successfully treated chronic coronary occlusions.
- The findings support routine stenting to improve outcomes in this patient group.
Background:
The Stenting In Chronic Coronary Occlusion (SICCO) study assessed the effects of additional intracoronary stenting (Palmaz-Schatz) after successful percutaneous transluminal coronary angioplasty (PTCA) of chronic coronary occlusions and showed a significant reduction of restenosis in stented patients.
Methods:
Univariate and logistic regression analyses were used to assess clinical, angiographic and procedure related predictors for restenosis (>50% diameter stenosis at follow-up) and Major Adverse Clinical Events (MACE=cardiac death, lesion-related acute myocardial infarction, repeat lesion-related angioplasty, bypass surgery involving the treated segment or angiographic documentation of reocclusion in non-revascularized patients) in the 114 SICCO patients with an angiographic end-point and 300 days clinical follow-up.
Results:
By 6 months the restenosis rate was 53%, and after 300 days MACE had occurred in 39%. Both the rates of restenosis and MACE was significantly reduced by stenting. The restenosis rate was improved by stenting also in patients with a 'stentlike' result after the initial PTCA. In the multivariate model the risk of restenosis was increased by a history of unstable angina, a long lesion and a non-tapering occlusion stump. LAD location was associated with a threefold increased risk of MACE.
Conclusion:
Stent implantation should always be considered in successfully opened chronic occlusions.