Why the study?
Persistent risks after PCI contribute to early and late complications, underscoring gaps in risk prediction models for recurrent coronary events such as stent thrombosis and in-stent restenosis.
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A prolonged duration since the initial myocardial infarction, along with factors like diabetes, smoking, and medication non-adherence, significantly elevates the risks of same-artery re-occlusion and stent thrombosis after PCI.
Objective: While PCI achieves high procedural success rates, persistent risks such as periprocedural thrombosis, inflammatory cascades, and myocardial hypoperfusion contribute to a bimodal pattern of early and late complications, underscoring gaps in current risk prediction models. This research focuses on identifying the risk factors contributing to recurrent coronary events, particularly stent thrombosis and in-stent restenosis, in patients admitted to the cardiac emergency department. Methods: A retrospective cohort study was conducted on 204 patients at Shahid Rajaei Hospital to analyze their clinical records, including demographic data, cardiovascular risk factors, and treatment history. Data collection utilized a structured checklist encompassing demographics, cardiovascular risk factors, treatment history, procedural details, and outcomes. Statistical analyses (PRISM version 9.0) included descriptive statistics and multivariable logistic regression to assess predictors of outcomes. Results: Multivariate logistic regression analysis revealed that for same-artery re-involvement, the duration after first myocardial infarction was significantly associated with increased risk (P < 0.0001, OR = 3.666). Regarding stent thrombosis, multiple factors including duration after myocardial infarction (P < 0.001), not taking Plavix (P = 0.033), MI type (P = 0.001), diabetes mellitus (P = 0.002), cigarette smoking (P = 0.029), and absence of family history (P = 0.03) all demonstrated significant effect. For in-stent restenosis, only the absence of diabetes (P = 0.018, OR = 0.432) was significantly associated with decreased likelihood of this outcome. Conclusion: The study also emphasizes the importance of early detection, regular follow-ups, and effective management strategies, such as pharmacological intervention and lifestyle changes, to reduce the risk of adverse cardiac outcomes. Additionally, it was found that a prolonged duration since the initial myocardial infarction significantly elevates the risks of same-artery re-occlusion and stent thrombosis.
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Firouzi et al. (2025) studied this question.
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