Intervention For Chronic Total Occlusion Research Articles

D-45 | J-CTO score as a predictor for outcomes after percutaneous coronary intervention of chronic total occlusions

D-45 | J-CTO score as a predictor for outcomes after percutaneous coronary intervention of chronic total occlusions

C-42 | In-Hospital Outcomes of Percutaneous Coronary Intervention for Chronic Total Occlusion in Patients With History of Ventricular Tachycardia: National Inpatient Sample Database Analysis.

C-42 | In-Hospital Outcomes of Percutaneous Coronary Intervention for Chronic Total Occlusion in Patients With History of Ventricular Tachycardia: National Inpatient Sample Database Analysis.

C-9 | Intravascular Imaging Improves Clinical Outcomes in Percutaneous Coronary Intervention for Chronic Total Occlusions: A Systematic Review and Meta-Analysis

C-9 | Intravascular Imaging Improves Clinical Outcomes in Percutaneous Coronary Intervention for Chronic Total Occlusions: A Systematic Review and Meta-Analysis

C-35 | The Effect of Frailty on Patient Outcomes After Percutaneous Coronary Intervention of Chronic Total Occlusion

C-35 | The Effect of Frailty on Patient Outcomes After Percutaneous Coronary Intervention of Chronic Total Occlusion

C-31 | Impact of Frailty on Prognosis in Chronic Total Occlusion Interventions: A Comprehensive Analysis of In-Hospital Mortality and Readmission Rates Following Percutaneous Coronary Intervention

C-31 | Impact of Frailty on Prognosis in Chronic Total Occlusion Interventions: A Comprehensive Analysis of In-Hospital Mortality and Readmission Rates Following Percutaneous Coronary Intervention

D-41 | Assessing the Burden of Frailty in Chronic Total Occlusion Interventions: In-Hospital Mortality and Readmission Outcomes Post-PCI

D-41 | Assessing the Burden of Frailty in Chronic Total Occlusion Interventions: In-Hospital Mortality and Readmission Outcomes Post-PCI

Impact of Early Intervention on Health Status Outcomes in Peripheral Artery Disease Patients with Chronic Total Occlusion Lesions Using the PORTRAIT Registry

To analyze the impact of non-invasive and early invasive treatments on health status in patients with lower extremity peripheral arterial disease (PAD) without and with chronic total occlusions (CTO) after 12 months of follow-up. Using the international (U.S., Netherlands, and Australia) observational longitudinal PORTRAIT registry, we included patients with recent PAD symptoms between June 2011 and December 2015. We assessed the PAD-specific health status at initial visit, 3-, 6- and 12-month follow-up using the Peripheral Arterial Questionnaire (PAQ). On a propensity matched-weighted cohort, we compared patients' characteristics by CTO status and treatment groups as early invasive (revascularization in the 3 months) vs. non-invasive (exercise, medical therapies, or smoking cessation). We then assessed the health status trajectory over 12 months, as 3-way interaction between CTO status, and treatment groups, and months, using a multilevel generalized linear regression model for repeated measures adjusted for baseline health status with random effects at sites- and patients-level. We included 581 participants, with mean age of 66.62±9.33 years, 34.3% female, and 90.8% White, of whom 353 (60.8%) without and 228 (39.2%) with a CTO lesion. Respectively, 96 (27.2%) and 70 (30.7%) patients underwent early invasive treatment (d=0.07). While patients with CTO were more likely to have lower resting ABI, multilevel disease, and to experience severe claudication vs. their counterparts (|d|≥0.20); the patients' health status at baseline with CTO was not different from those without CTO, with mean Summary scores of 45.14±20.26 vs. 45.90±21.24 (d=0.04), respectively. The trajectory did not differ by CTO status (interaction CTO status*month: p=0.517) and was higher in early invasive vs. non-invasive treatment (treatment*month: p<0.001), regardless of CTO status (CTO status*treatment: p=0.981 and CTO status*treatment*month: p=0.264). The score increased over time with the largest improvement occurring at 3 months in both non-invasive (non-CTO: +7.82 95%CI 4.03;11.60 and CTO: +9.27 95%CI 4.45;14.09) and early invasive (non-CTO: +26.17 95%CI 20.06; 32.28 and CTO: +24.52 95%CI 17.40;31.64) groups. The mean score in CTO vs. non-CTO did not differ at each timepoint, with the 12-month mean score of 70.26 (95%CI 67.87; 74.65) vs. 71.17 (95% CI 65.91; 76.44) (p=0.99) in the non-invasive treatment and 84.93 (95%CI 78.90;90.97) vs. 79.20 (95%CI 72.77;86.14) (p=0.31) in the early invasive treatment. Patients with symptomatic PAD undergoing early revascularization exhibited higher health status over time vs. those undergoing non-invasive treatment strategy, irrespective of the presence of CTOs. The degree of the improvement was greater in the 3 months following the initial visit, especially in patients undergoing early revascularization.

Retrograde Coronary Chronic Total Occlusion Intervention (JR-CTO) Score: From the Japanese CTO-PCI Expert Registry.

Despite the effectiveness of the retrograde approach for chronic total occlusion (CTO) lesions, there are no standardized tools to predict the success of retrograde percutaneous coronary intervention (PCI). The objective of this study was to develop a prediction tool to identify CTO lesions that will achieve successful retrograde PCI. This study evaluated data from 2,374 patients who underwent primary retrograde CTO-PCI and were enrolled in the Japanese CTO-PCI Expert Registry between January 2016 and December 2022 (NCT01889459). All observations were randomly assigned to the derivation and validation cohorts at a 2:1 ratio. The prediction score for guidewire failure in retrograde CTO-PCI was determined by assigning 1 point for each factor and summing all accrued points. The JR-CTO score (moderate-severe calcification, tortuosity, Werner collateral connection grade≤1, and nonseptal collateral channel) demonstrated a C-statistic for guidewire failure of 0.72 (95%CI: 0.67-0.76) and 0.71 (95%CI: 0.64-0.77) in the derivation and validation cohorts, respectively. Patients with lower scores had higher guidewire and technical success rates and decreased guidewire crossing time and procedural time (P< 0.01). The JR-CTO (Japanese Retrograde Chronic Total Occlusion) score, a simple 4-item score that predicts successful guidewire crossing in patients undergoing retrograde CTO-PCI, has the potential to support clinical decision-making for the retrograde approach.

Validation of the BCIS CHIP Score in chronic total occlusion percutaneous coronary intervention.

The complex high-risk indicated percutaneous coronary intervention (CHIP) score is a tool developed using the British Cardiovascular Intervention Society (BCIS) database to define CHIP cases and predict in-hospital major adverse cardiac or cerebrovascular events (MACCE). To assess the validity of the CHIP score in chronic total occlusion (CTO) percutaneous coronary intervention (PCI). We evaluated the performance of the CHIP score on 8341 CTO PCIs from the Prospective Global Registry for the Study of Chronic Total Occlusion Intervention (PROGRESS-CTO) performed at 44 centers between 2012 and 2023. In our cohort, 7.8% (n = 647) of patients had a CHIP score of 0, 50.2% (n = 4192) had a CHIP score of 1-2, 26.2% (n = 2187) had a CHIP score of 3-4, 11.7% (n = 972) had a CHIP score of 5-6, 3.3% (n = 276) had a CHIP score of 7-8, and 0.8% (n = 67) had a CHIP score of 9+. The incidence of MACCE for a CHIP score of 0 was 0.6%, reaching as high as 8.7% for a CHIP score of 9+, confirming that a higher CHIP score is associated with a higher risk of MACCE. The estimated increase in the risk of MACCE per one score unit increase was 100% (95% confidence interval [CI]: 65%-141%). The AUC of the CHIP score model for predicting MACCE in our cohort was 0.63 (95% CI: 0.58-0.67). There was a positive correlation between the CHIP score and the PROGRESS-CTO MACE score (Spearman's correlation: 0.37; 95% CI: 0.35-0.39; p < 0.001). The CHIP score has modest predictive capacity for MACCE in CTO PCI.

Percutaneous Coronary Intervention versus Coronary Artery Bypass Grafting for Chronic Total Occlusion of Coronary Arteries

Background: Chronic Total Occlusion (CTO) of coronary arteries presents a significant challenge in the management of coronary artery disease (CAD), influencing treatment outcomes and patient prognosis. Percutaneous Coronary Intervention (PCI) and Coronary Artery Bypass Grafting (CABG) are two predominant revascularization strategies employed, each offering distinct benefits and limitations. Objective: This study aims to compare the efficacy and safety of PCI and CABG in managing patients with CTO, to inform clinical decision-making and optimize treatment approaches. Methods: A retrospective analysis was conducted at Lady Reading Hospital, Peshawar, from January 1, 2021, to December 31, 2023. We included 145 patients diagnosed with CTO who underwent PCI (n=65) or CABG (n=80). Data were collected on patient demographics, clinical features, lesion characteristics, procedural details, and follow-up outcomes. Major Adverse Cardiac Events (MACE) and quality of life measures were the primary endpoints. Statistical analysis was performed using SPSS version 25, employing Mann-Whitney U and Chi-square tests for continuous and categorical variables, respectively. Results: The procedural success rate was 84.6% for PCI and 90% for CABG. MACE occurred in 23.1% of the PCI group and 15% of the CABG group. The average hospitalization duration was 5.8 days for PCI and 8.5 days for CABG. Quality of life assessments showed comparable scores between groups, with PCI scoring 80.6 on the Seattle Angina Questionnaire and CABG scoring 79.8. Conclusion: PCI and CABG demonstrated similar efficacy and safety profiles in the management of CTO, underscoring the need for individualized treatment strategies based on patient-specific factors. Both methods proved viable, with slightly higher procedural success in CABG and comparable quality of life outcomes.

Impact of sex on myocardial perfusion following percutaneous coronary intervention of chronic total coronary occlusions

ObjectivesWe sought to investigate the impact of sex on myocardial perfusion changes following chronic total coronary occlusion (CTO) percutaneous coronary intervention (PCI) as measured by [15O]H2O positron-emission tomography (PET) perfusion imaging. BackgroundCTO PCI has been associated with an increase in myocardial perfusion, yet females are less likely to undergo revascularization. As such, data on the impact of sex on myocardial perfusion following CTO PCI is scarce. MethodsA total of 212 patients were prospectively enrolled and underwent CTO PCI combined with [15O]H2O PET perfusion imaging prior to and 3 months after PCI. Hyperemic myocardial blood flow (hMBF, mL·min−1·g−1) and coronary flow reserve (CFR) allocated to the CTO territory were quantitatively assessed. ResultsThis study comprised 34 (16 %) females and 178 (84 %) males. HMBF at baseline did not differ between sexes. Females showed a higher increase in hMBF than males (Δ1.34 ± 0.67 vs. Δ1.06 ± 0.74, p = 0.044), whereas post-PCI hMBF was comparable (2.59 ± 0.85 in females vs. 2.28 ± 0.84 in males, p = 0.052). Female sex was independently associated with a higher increase in hMBF after correction for clinical covariates. CFR increase after revascularization was similar in females and males (Δ1.47 ± 0.99 vs. Δ1.30 ± 1.14, p = 0.711). ConclusionsThe present study demonstrates a greater recovery of stress perfusion in females compared to males as measured by serial [15O]H2O PET imaging. In addition, a comparable increase in CFR was found in females and males. These results emphasize the benefit of performing CTO PCI in both sexes. Clinical perspectiveWhat is new?•CTO PCI has been associated with an increase in myocardial perfusion, yet females are less likely to undergo revascularization.•We found a greater recovery of stress perfusion in females compared to males after CTO PCI as measured by serial [15O]H2O PET imaging, whereas coronary flow reserve was comparable between sexes.•The present study adds to the limited body of evidence on the impact of sex on myocardial perfusion following CTO PCI.What are the clinical implications?•Our findings suggest that recovery of myocardial perfusion following CTO PCI is achievable in both female and male patients.•These results underscore the need to adhere to current guidelines for optimal CTO management in both sexes.•Future studies with standardized preprocedural imaging are warranted to increase our understanding of the impact of sex on changes in myocardial perfusion following CTO PCI.

Clinical prediction factors of nonchronic total occlusion lesion progression in patients with unstable angina receiving percutaneous coronary intervention for chronic total occlusion lesions

BackgroundIn this study, we investigated clinical prediction factors of nonchronic total occlusion lesion (NCTOL) progression in patients who underwent percutaneous coronary intervention (PCI) for chronic total occlusion (CTO) lesions. MethodsIn total, 450 patients with unstable angina (mean age = 57.1 ± 9.2 years) who underwent PCI for CTO lesions between January 2016 and December 2018 at Beijing Anzhen Hospital were enrolled in this study. A clinical and angiographic follow-up examination was performed 12 months postoperatively. The patients were divided into NCTOL progression (145 cases) and control (305 cases) groups based on the outcome of the 12-month angiographic follow-up. The clinical and angiographic features of the participants were analyzed. ResultsThe adenosine diphosphate-induced platelet aggregation (ADP-IPA) rate and levels of lipoprotein (a) (Lp(a)) in the NCTOL progression group were significantly higher than those in the control group (51.89 ± 14.81 vs. 39.63 ± 17.12, P < 0.01; 0.22 ± 0.26 vs. 0.14 ± 0.18, P < 0.05, respectively). Logistic regression showed that the ADP-IPA rate (odds ratio = 1.047, 95 % confidence interval: 1.014–1.082, P = 0.005) and Lp(a) (odds ratio = 11.972, 95 % confidence interval: 1.230–116.570, P = 0.033) were independent predictors of NCTOL progression. Partial correlation analysis demonstrated that the ADP-IPA rate was positively correlated with NCTOL progression (r = 0. 351, P < 0.001). Receiver operating characteristic curve showed that the boundary point of the ADP-IPA rate to predict NCTOL progression was 30 % (sensitivity, 86.2 %; specificity, 68.9 %). ConclusionsNCTOL progression is an important cause of recurrent PCI in patients with coronary artery disease after PCI for CTO lesions. The ADP-IPA rate is a useful predictor for NCTOL progression in patients with unstable angina who undergo PCI for CTO lesions.

Angiography-derived physiological assessment after percutaneous coronary intervention of chronic total occlusions.

Scant data exploring potential suboptimal physiological results after angiographic successful percutaneous coronary intervention (PCI) of chronic total occlusion (CTO) are available. Sixty cases of successful CTO-PCI were selected for this retrospective analysis. Post-CTO-PCI angiography-based fractional flow reserve was computed using the Murray-based fractional flow reserve (μFR) software. Vessel-specific μFR, residual trans-stent gradient (TSG) and corrected TSGstent were calculated. In physiological suboptimal results (μFR < 0.90), the virtual pullback pressure gradient (PPG) curves were analyzed to localize the main pressure drop-down and characterize the patterns of residual disease. The virtual pullback pressure gradient index (vPPGi) was then calculated to objectively characterize the predominant pattern of residual disease (diffuse vs focal). The physiological result was suboptimal in 28 cases (46.7%). The main pressure drop was localised proximal to the stent in 2 (7.1%), distal in 17 (60.7%) and intra-stent in 9 cases (32.2%). Intra-stent residual disease was diffuse in 7 cases and mixed in 2. Distal residual disease was characterised by a pure focal pattern in 12 cases, diffuse in 2 and mixed in 3. In the predominant diffuse phenotype (vPPGi < 0.65), we found a higher rate of TSG ≥ 0.04 (61.5% vs 20.0%, p = 0.025) and TSGstent ≥ 0.009 (46.2% vs 20.0%, p = 0.017) while in the dominant focal phenotype poor-quality distal vessel was constantly present. In our cohort, post-CTO-PCI suboptimal physiological result was frequent (46.7%). Predominant focal phenotype was constantly associated with poor-quality distal vessel, while in the predominant diffuse phenotype, the rate of TSG ≥ 0.04 and TSGstent ≥ 0.009 were significantly higher.

Which is the best approach for percutaneous coronary intervention of chronic total occlusions? The one you feel most confident with!

Key points Percutaneous coronary intervention of chronic total occlusion remains a challenging niche, where minimization of technical failure and complication rates must be dearly pursued. The minimalist hybrid approach is a novel recanalization strategy which provides an individualized technical framework minimizing simultaneous dual injection and large‐bore catheters unless clearly needed. This study reports an observational comparison between a standard revascularization strategy for chronic total occlusion and the minimalist hybrid approach, suggesting the latter may be associated with some benefits, including more parsimonious use of costly devices.

The utility of guide catheter extensions (GCE) in coronary interventions and specifically chronic total occlusion (CTO) interventions.

Key points Guide catheter extensions (GCE) are associated with improved success in chronic total occlusions interventions. GCE can be associated with a higher risk of complications, although found to not be statistically significant in this large multicenter registry. Care must be exercised in the use of GCE to ensure a successful intervention and limit rates of complications.

The Presence of Chronic Total Occlusion in Noninfarct-Related Arteries Is Associated With Higher Mortality and Worse Patient Outcomes Following Percutaneous Coronary Intervention for STEMI: A Systematic Review, Meta-Analysis and Meta-Regression.

Reperfusion therapy with percutaneous coronary intervention improves outcomes in patients with ST-elevation myocardial infarction. We conducted a meta-analysis to assess the impact of chronic total occlusion (CTO) in noninfarct-related artery on the outcomes of these patients. Comprehensive searches were performed using PubMed, Google Scholar, and EMBASE. The primary endpoint was the 30-day mortality rate, with secondary endpoints including all-cause mortality, repeat myocardial infarction, and stroke. Forest plots were created for the pooled analysis of the results, with statistical significance set at P < 0.05. A total of 19 studies were included in this meta-analysis, with 23,989 patients (3589 in CTO group and 20,400 in no-CTO group). The presence of CTO was associated with significantly higher odds of 30-day mortality [18.38% vs 5.74%; relative risk (RR), 3.69; 95% confidence intervals (CI), 2.68-5.07; P < 0.00001], all-cause mortality (31.00% vs 13.40%; RR, 2.79; 95% CI, 2.31-3.37; P < 0.00001), cardiovascular-related deaths (12.61% vs 4.1%; RR, 2.61; 95% CI, 1.99-3.44; P < 0.00001), and major adverse cardiovascular events (13.64% vs 9.88%; RR, 2.08; 95% CI, 1.52-2.86; P < 0.00001) than the non-CTO group. No significant differences in repeated myocardial infarction or stroke were observed between the CTO and non-CTO groups. Our findings underscore the need for further research on the benefits and risks of performing staged or simultaneous percutaneous coronary intervention for CTO in the noninfarct-related artery in patients with ST-elevation myocardial infarction.

Value of different CTO scoring systems in predicting procedural success in coronary chronic total occlusion intervention in Egyptian patients

BackgroundChronic total occlusion (CTO) lesions in coronary arteries pose a significant challenge for coronary interventionists, often leading to referrals for coronary artery bypass graft surgery (CABG). Successful percutaneous coronary intervention (PCI) for CTOs requires accurate assessment of procedural potential. This study, comprising 100 Egyptian patients aged 37–81, compares the predictive efficacy of various CTO scoring systems in PCI success determination. Patients with CTO in at least one coronary artery, planned for elective PCI based on objective evidence of ischemia, were included. Experienced operators performed PCI, recording procedural variables, and assessing complications. Logistic regression analysis revealed an inverse linear relationship between success rates and score values across all systems.ResultsAlthough, the predictive capacity of the scores was similar, with slight differences. The Euro CTO (CASTLE) score10 exhibited superior predictive efficacy, followed by the CL score9, while PROGRESS8 and J-CTO7 scores showed lower significance. ORA CTO11 score demonstrated intermediate predictive ability, and PROGRESS score8 had the least predictive value.ConclusionThe CASTLE score10 proved most effective in predicting PCI success for CTO cases in Egyptian patients, with operators advised to choose scoring systems based on experience and case characteristics. Proper planning remains crucial for optimizing success rates in CTO PCI procedures, irrespective of the scoring system employed.

Coronary intervention in chronic total occlusion in left main coronary artery.

An 83-year-old man who had undergone coronary aorta bypass graft surgery 25 years ago required treatment for new-onset worsening angina.

Use of plaque modification microcatheters during percutaneous coronary interventions for chronic total occlusion: insights from the PROGRESS-CTO Registry.

Plaque modification microcatheters (PM) (Tornus [Asahi] and Turnpike Gold [Teleflex]) are devices that are mainly used to modify the cap or lesion and maintain good support in chronic total occlusion (CTO) percutaneous coronary artery intervention (PCI). We evaluated the frequency of use and outcomes of plaque modification microcatheters in an international multicenter registry. Plaque modification microcatheters were utilized in 242 cases (1.6%: Tornus in 51% and Turnpike Gold in 49%) with decreasing frequency over time (P-for-trend: 0.007 and 0.035, respectively). Technical and procedural success and the incidence of major cardiac adverse events were similar with Tornus and Turnpike Gold use. PM are infrequently utilized in CTO-PCI and are associated with high success and acceptable complication rates.

ASSESSMENT OF LONG-TERM OUTCOMES OF PATIENTS UNDERGOING PERCUTANEOUS CORONARY INTERVENTION (PCI) FOR CHRONIC TOTAL OCCLUSIONS

A minimal surgical procedure called ‘PCI’ (percutaneous coronary intervention) is performed to treat those who have diseases of the coronary arteries. A period of more than three months of entire blockage of a coronary artery results in a ‘CTO’ (chronic total occlusions). The primary goal of the research is to determine the performance of patients who have ‘PCI’ (percutaneous coronary intervention) for chronic total occlusions (CTO). The study was conducted at Lady Reading Hospital MTI from March 2022 to December 2022. The research included 400 individuals with ‘percutaneous coronary intervention’ for ‘CTO.’ Information was gathered via follow-up appointments and records from patients. All-caused death was the study's primary objective; major adverse cardiac events (MACE), repeated revascularization’, and standard of life were its additional objectives. Survival analysis and descriptive statistical methods were used to analyze the data. This research looked at the long-term results of individuals who had ‘percutaneous coronary intervention ‘for ‘A CTO’ and revealed that 400 individuals had at least one ‘percutaneous coronary intervention ‘for a ‘CTO.’ The individual's average age was 58.9 ± 6.07 years, and 70.3% of them were men. This research concludes that with a total success rate of 87.5%, ‘percutaneous coronary intervention ‘for chronic complete occlusions may result in favorable long-lasting results.