Background: The majority of cardiovascular events in patients undergoing PCI arise from the progression of NCL during the long-term follow-up period. The purpose of the study was to investigate the clinical and angiographic factors related to the progression of non-culprit lesions (NCL) of patients undergoing percutaneous coronary interventions (PCI).
Methods: One hundred and seventeen patients that underwent two coronary angiograms with a time interval greater than 3 months were enrolled. All patients underwent PCI as a treatment for the culprit lesion. In the second coronary angiography we investigated whether they had a new culprit lesion clearly differentiated from the one of the first angiogram. The demographic characteristics, the clinical syndrome responsible for the first PCI and the procedural characteristics were recorded. Quantitative coronary angiography was performed at the culprit lesion of the second angiography and in the same lesion in the first angiography.
Results: Multivariate analysis showed that the independent variables for the development of a significant lesion at the follow-up requiring intervention were: the presence of complex lesion (53.78% vs 36.22%, p<0.001, OR=39.42), acute myocardial infarction (AMI) at the initial diagnosis (36.3% vs 32.4%, p<0.001, OR=3.9), and smoking (46.15% vs 53.84%, p=0.03, OR=0.29).
Conclusions: Patients with AMI and complex morphology of NCL have increased risk for a new intervention after successful PCI. Smoking at the time of the follow up, was associated with fewer coronary interventions.
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