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BACKGROUND:The prevalence, treatment and outcomes of balloon undilatable chronic total occlusions (CTOs) have received limited study. METHODS:We examined the prevalence, clinical and angiographic characteristics, and procedural outcomes of percutaneous coronary interventions (PCIs) for balloon undilatable CTOs in a contemporary multicenter US registry. RESULTS:Between 2012 and 2017 data on balloon undilatable lesions were available for 425 consecutive CTO PCIs in 415 patients in whom guidewire crossing was successful: 52 of 425 CTOs were balloon undilatable (12%). Mean patient age was 65 ± 10 years and most patients were men (84%). Patients with balloon undilatable CTOs were more likely to be diabetic (67 vs. 41%, P

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Objective: The outcomes of chronic total occlusion (CTO) percutaneous coronary intervention (PCI) in octogenarians and nonagenarians have received limited study. Methods: We compared in‐hospital outcomes of CTO PCI between patients ≥80 vs. <80‐years‐old in 6233 CTO PCIs performed between 2012 and 2020 at 33 U.S. and international centers. Results: There were 415 octogenarians and nonagenarians in our study (7% of the total population). Compared with younger patients, octo‐ and nonagenarians were less likely to be men (73% vs. 83.2%, p < 0.0001) and more likely to have atrial fibrillation (27% vs. 12%, p < 0.0001) and prior coronary artery bypass graft surgery (CABG) (43% vs. 29%, p < 0.0001). They were more likely to have CTOs with moderate/severe calcification (71% vs. 46%, p < 0.0001), but had similar mean J‐CTO scores (2.5 ± 1.3 vs. 2.4 ± 1.3, p = 0.08). They had lower technical and procedural success (82.2% vs. 86.3%, p = 0.0201; 80.3% vs. 84.8%, p = 0.016, respectively) and higher incidence of in‐hospital major adverse cardiovascular events (3.4% vs. 1.8%, p = 0.021). On multivariable analysis PCI in octo‐ and nonagenarians was not independently associated with technical and procedural success or with in‐hospital MACE. Conclusion: CTO PCI is feasible in octo‐ and nonagenarians, although success rates are lower, and the risk of complications is higher compared with younger patients, likely related to more comorbidities and higher coronary lesion complexity. [ABSTRACT FROM AUTHOR]

The impact of peripheral artery disease (PAD) in patients undergoing chronic total occlusion (CTO) percutaneous coronary intervention (PCI) has received limited study. We reviewed 3999 CTO PCIs performed in 3914 patients between 2012 and 2018 at 25 centers, 14% of whom had a history of PAD. We compared the clinical and angiographic characteristics and procedural outcomes of patients with versus without history of PAD. Patients with PAD were older (67 ± 9 vs 64 ± 10 years, P <.001) and had a higher prevalence of cardiovascular risk factors. They also had more complex lesions as illustrated by higher Japanese CTO score (2.7 ± 1.2 vs 2.4 ± 1.3, P <.001). In patients with PAD, the final crossing technique was less often antegrade wire escalation (40% vs 51%, P <.001) and more often the retrograde approach (23 vs 20%, P <.001) and antegrade dissection/reentry (20% vs 16%, P <.001). Technical success was similar between the 2 study groups (84% vs 87%, P =.127), but procedural success was lower for patients with PAD (81% vs 85%, P =.015). The incidence of in-hospital major adverse cardiac events was higher among patients with PAD (3% vs 2%, P =.046). In conclusion, patients with PAD undergoing CTO PCI have more comorbidities, more complex lesions, and lower procedural success. [ABSTRACT FROM AUTHOR]

Objectives The aim of this study was to determine the techniques and outcomes of hybrid chronic total occlusion (CTO) percutaneous coronary intervention (PCI) in a diverse group of patients and operators on 2 continents. Background CTO PCI has been evolving with constant improvement of equipment and techniques. Methods Contemporary outcomes of CTO PCI were examined by analyzing the clinical, angiographic, and procedural characteristics of 3,122 CTO interventions performed in 3,055 patients at 20 centers in the United States, Europe, and Russia. Results The mean age was 65 ± 10 years, and 85% of the patients were men, with high prevalence of diabetes (43%), prior myocardial infarction (46%), prior coronary artery bypass graft surgery (33%), and prior PCI (65%). The CTO target vessels were the right coronary artery (55%), left anterior descending coronary artery (24%), and left circumflex coronary artery (20%). The mean J-CTO (Multicenter Chronic Total Occlusion Registry of Japan) and PROGRESS CTO (Prospective Global Registry for the Study of Chronic Total Occlusion Intervention) scores were 2.4 ± 1.3 and 1.3 ± 1.0, respectively. The overall technical and procedural success rate was 87% and 85%, respectively, and the rate of in-hospital major complications was 3.0%. The final successful crossing strategy was antegrade wire escalation in 52.0%, retrograde in 27.1%, and antegrade dissection re-entry in 20.9%; >1 crossing strategy was required in 40.9%. Median contrast volume, air kerma radiation dose, and procedure and fluoroscopy time were 270 ml (interquartile range: 200 to 360 ml), 2.9 Gy (interquartile range: 1.7 to 4.7 Gy), 123 min (interquartile range: 81 to 188 min) and 47 min (interquartile range: 29 to 77 min), respectively. Conclusions CTO PCI is currently being performed with high success and acceptable complication rates among various experienced centers in the United States, Europe, and Russia. (Prospective Global Registry for the Study of Chronic Total Occlusion Intervention [PROGRESS CTO]; NCT02061436 ) [ABSTRACT FROM AUTHOR]

Supplemental Digital Content is available in the text. Background: We examined the procedural outcomes of chronic total occlusions (CTO) percutaneous coronary interventions in patients with prior coronary artery bypass graft surgery (CABG). Methods and Results: We compared the clinical, angiographic characteristics and outcomes of 3486 CTO interventions performed in patients with (n=1101) and without (n=2317) prior CABG at 21 centers. Prior CABG patients (32% of total cohort) were older (67±9 versus 63±10 years; P <0.001) and had more comorbidities and lower left ventricular ejection fraction (50% [40–58] versus 55% [45–60]; P <0.001). The CTO target vessel in prior CABG patients was the right coronary artery (56%), circumflex (26%), and left anterior descending artery (17%). The mean J-CTO (2.9±1.2 versus 2.2±1.3; P <0.001) and PROGRESS-CTO (Prospective Global Registry for the Study of Chronic Total Occlusion Intervention; 1.5±1.1 versus 1.2±1.0; P <0.001) score was higher in prior CABG patients. Retrograde (53% versus 30%, P <0.001) and antegrade dissection reentry (35% versus 28%; P <0.001) techniques were used more frequently in prior CABG patients. Prior CABG patients had lower technical (84% versus 89%; P <0.001) and procedural (82% versus 87%, P <0.001) success, but similar incidence of in-hospital major complications (3.1% versus 2.5%; P =0.287). In-hospital mortality (1% versus 0.4%; P =0.016) and coronary perforation (7.1% versus 3.1%; P <0.001) occurred more frequently in prior CABG patients, however, CABG patients had a lower incidence of pericardial tamponade (0.1% versus 1.0%; P =0.002) and pericardiocentesis (0% versus 1.3%; P <0.001). Conclusions: In a large multicenter CTO percutaneous coronary interventions registry, prior CABG patients had lower success rate but similar overall risk for complications, although mortality was higher and the incidence of tamponade was lower. Clinical Trial Registration: URL: https://www.clinicaltrials.gov. Unique identifier: NCT02061436. [ABSTRACT FROM AUTHOR]

Background Various scoring systems have been developed to predict the technical outcome and procedural efficiency of chronic total occlusion (CTO) percutaneous coronary intervention (PCI). Methods We examined the predictive capacity of 3 CTO PCI scores (Clinical and Lesion-related [CL], Multicenter CTO registry in Japan [J-CTO] and Prospective Global Registry for the Study of Chronic Total Occlusion Intervention [PROGRESS CTO] scores) in 664 CTO PCIs performed between 2012 and 2016 at 13 US centers. Results Technical success was 88% and the retrograde approach was utilized in 41%. Mean CL, J-CTO and PROGRESS CTO scores were 3.9 ± 1.9, 2.6 ± 1.2 and 1.4 ± 1.0, respectively. All scores were inversely associated with technical success (p < 0.001 for all) and had moderate discriminatory capacity (area under the curve 0.691 for the CL score, 0.682 for the J-CTO score and 0.647 for the PROGRESS CTO score [p = non-significant for pairwise comparisons]). The difference in technical success between the minimum and maximum CL score strata was the highest (32%, vs. 15% for J-CTO and 18% for PROGRESS CTO scores). All scores tended to perform better in antegrade-only procedures and correlated significantly with procedure time and fluoroscopy dose; the CL score also correlated significantly with contrast utilization. Conclusions CL, J-CTO and PROGRESS CTO scores perform moderately in predicting technical outcome of CTO PCI, with better performance for antegrade-only procedures. All scores correlate with procedure time and fluoroscopy dose, and the CL score also correlates with contrast utilization. [ABSTRACT FROM AUTHOR]