الفهرس 
ContentsOnly 14 pages are availabe for public view
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Abstract
Percutaneous coronary intervention for chronic total occlusion lesions is one of the main technical challenges in contemporary interventional cardiology. With the significant developments in interventional procedures over the last decade, the success rate and safety of PCI in CTO cases is improved (Lee et al., 2019). The aim of the study is to assess the clinical improvement in patients with coronary chronic total occlusion undergoing percutaneous intervention according to calculation of J-CTO Score. The current study revealed the following results : 1. History of smoking and HTN and dyslipidemia were significantly more frequent in higher J-CTO score groups. 2. There was highly statistical significance regarding blood pressure, EF and ECHO parameters among four groups. 3. The more the J-CTO scores the higher WBCS, total cholesterol, TG, LDL and lower HDL when compared to easy group. 4. Blunt entry, calcification and occlusion length > 20mm show higher frequency among very difficult group and difficult groups compared to others with statistical significance. 5. High significant difference was detected as regard loading drug, PCI technique. Also 3 months outcome as regard not improving and 6 months outcome as regard recurrent hospitalization and sudden cardiac death were more frequent in very difficult group. 6. No significant difference regarding demographic data among both group. 7. Vessel affection showed statistically significant difference as RCA showed higher frequency in improved group than not improved group. 8. LAD showed greater frequency in not improved group than improved group. 9. J-CTO score was significantly elevated in not improved cases compared to improved cases. 10. Blunt entry showed significant higher frequency in not improved cases compared to improved cases. 11. J-CTO score best cut-off values were 2.50. The area under the curve (AUC) was 0.736 (p=0.002. 12. WBCS and J-CTO score were significantly risk factor for MACE, 13. DFS estimates were 97.5% at 3 months interval and 77.5% at 12 months interval in (J-CTO<2.5) group while they were 70.0% at 3 months interval and 30.0% at 6 months interval in (J-CTO>2.5)group with significant difference between 2 groups. The J-CTO score remains a valuable tool in prediction of procedural success in cases undergoing CTO PCI, and also the increased scores correlated with a high probability of MACE incidence. Routine calculation of J-CTO score is still valuable in identifying the challenging cases that might necessitate more planning or proctoring.