Twenty-first century epidemiology of dyslipidemia in Greece: EMENO national epidemiological study

1. Introduction Chronic total occlusion (CTO) occurs in approximately 13–30% of patients with coronary artery disease undergoing coronary angiography1,2, and remains a major challenge in interventional cardiology. Although successful percutaneous coronary intervention (PCI) is associated with improvements in symptoms and quality of life3, only 12.4% of patients with CTO receive CTO-PCI, according to a previous study4. Coronary collateral circulation (CCC) is associated with favorable clinical outcomes and might be a protective[…]

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