The document discusses epidemiological data on chronic total occlusions (CTOs). It finds that CTO prevalence can range from 20-40% of patients with documented coronary artery disease to 10% of percutaneous coronary intervention targets. A 2005 study found CTOs in 24% of patients and 52% of those with significant stenosis. National differences in CTO prevalence may be due to genetic, dietary, smoking, and access to care factors. It concludes that knowing a region's prevalence of these risk factors can help modify approaches.

1. Epidemiology of CTO. Why are data different? Vladimir Ganyukov MD, PhD State Research Institute for Complex Issues of Cardiovascular Diseases, KEMEROVO, RUSSIAN FEDERATION

2. The real prevalence of CTOs is unknown!

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12. TCT2011 2006 Germany experience = 7,6% CTO recanalisation of elective PCI

14. 2011 State Research Institute for Complex Issues of Cardiovascular Diseases, KEMEROVO, RUSSIAN FEDERATION 887 (21.4%) 4146 elective coronary angios 306 (3 5 %) 214 (24%) 367 (41%)

15. 2011 State Research Institute for Complex Issues of Cardiovascular Diseases, KEMEROVO, RUSSIAN FEDERATION 1172 elective PCI Attempted CTO PCI n=170 (14.5%) Successful CTO PCI n=127 (10.8%) Selected for CTO PCI n=214 (18.3%)