Intravascular Imaging in the Diagnosis and Management of Patients With Suspected Intracoronary Pathologies: A CJC White Paper.

Intravascular imaging has become an integral part of the diagnostic and management strategies for intracoronary pathologies. In this White Paper we summarize current evidence and its implications on the use of intravascular imaging in interventional cardiology practice. The areas addressed are planning and optimization of percutaneous coronary intervention, management of stent failure, and evaluation of ambiguous coronary lesions and myocardial infarction with nonobstructive coronary disease. The findings presented followed the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system in an expert consensus process that involved a diverse writing group vetted by a review group. Expert consensus was achieved around 9 statements. Use of intravascular imaging in guiding percutaneous revascularization is supported by high-quality evidence, particularly for lesions with increased risk of recurrent events or stent failure. Specific considerations for intravascular imaging guidance of intervention in left main lesions, chronic occlusion lesions, and in patients at high risk of contrast nephropathy are explored. Use of intravascular imaging to identify pathologies associated with stent failure and guide repeat intervention, resolve ambiguities in lesion assessment, and establish diagnoses in patients who present with myocardial infarction with nonobstructive coronary disease is supported by moderate- to low-quality evidence. Each topic is accompanied by clinical pointers to aid the practicing interventional cardiologist in implementation of the White Paper findings. The findings presented in this White Paper will help to guide the use of intravascular imaging toward situations in which the balance of efficacy, safety, and cost are most optimal.

Right Ventricular Assist Device With an Oxygenator for the Management of Combined Right Ventricular and Respiratory Failure: A Systematic Review.

BACKGROUND: Severe lung disease frequently presents with both refractory hypoxemia and right ventricular (RV) failure. Right ventricular assist device with an oxygenator (OxyRVAD) is an extracorporeal membrane oxygenation (ECMO) configuration of RV bypass that also supplements gas exchange. This systematic review summarises the available literature regarding the use of OxyRVAD in the setting of severe lung disease with associated RV failure. METHODS: PubMed, Embase, and Google Scholar were queried on September 27, 2023, for articles describing the use of an OxyRVAD configuration. The main outcome of interest was survival to intensive care unit (ICU) discharge. Data on the duration of OxyRVAD support and device-related complications were also recorded. RESULTS: Out of 475 identified articles, 33 were retained for analysis. Twenty-one articles were case reports, and 12 were case series, representing a total of 103 patients. No article provided a comparison group. Most patients (76.4%) were moved to OxyRVAD from another type of mechanical support. OxyRVAD was used as a bridge to transplant or curative surgery in 37.4% and as a bridge to recovery or decision in 62.6%. Thirty-one patients (30.1%) were managed with the dedicated single-access dual-lumen ProtekDuo cannula. Median time on OxyRVAD was 12 days (interquartile range 8-23 days), and survival to ICU discharge was 63.9%. Device-related complications were infrequently reported. CONCLUSION: OxyRVAD support is a promising alternative for RV support when gas exchange is compromised, with good ICU survival in selected cases. Comparative analyses in patients with RV failure with and without severe lung disease are needed.

Perioperative Cardiovascular Risk Assessment and Management in Liver Transplant Recipients: A Review of the Literature Merging Guidelines and Interventions.

Liver transplantation (LT) is the second most performed solid organ transplant. Coronary artery disease (CAD) is a critical consideration for LT candidacy, particularly in patients with known CAD or risk factors, including metabolic dysfunction associated with steatotic liver disease. The presence of severe CAD may exclude patients from LT; therefore, precise preoperative evaluation and interventions are necessary to achieve transplant candidacy. Cardiovascular complications represent the earliest nongraft-related cause of death post-transplantation. Timely intervention to reduce cardiovascular events depends on adequate CAD screening. Coronary disease screening in end-stage liver disease is challenging because standard noninvasive CAD screening tests have low sensitivity due to hyperdynamic state and vasodilatation. As a result, there is overuse of invasive coronary angiography to exclude severe CAD. Coronary artery calcium scoring using a computed tomography scan is a tool for the prediction of cardiovascular events, and can be used to achieve risk stratification in LT candidates. Recent literature shows that qualitative assessment on both noncontrast- and contrast-enhanced chest computed tomography can be used instead of calcium score to assess the presence of coronary calcium. With increasing prevalence, protocols to address CAD in LT candidates must be reconsidered. Percutaneous coronary intervention could allow a shorter duration of dual-antiplatelet therapy in simple lesions, with safer perioperative outcomes. Hybrid coronary revascularization is an option for high-risk LT candidates with multivessel disease nonamenable to percutaneous coronary intervention. The objective of this review is to evaluate existing methods for preoperative cardiovascular risk stratification, and to describe interventions before surgery to optimize patient outcomes and reduce cardiovascular event risk.

Evaluation and management of drug-eluting stent in-stent restenosis.

PURPOSE OF REVIEW: In-stent restenosis (ISR) is the most common cause of stent failure. Although the rate of ISR is significantly lower with contemporary drug-eluting stents (DES), it remains a challenging clinical entity to treat. RECENT FINDINGS: In this review, we focus on a practical approach to management of DES ISR with intravascular imaging at its core, as supported by several recently published articles. This facilitates assessment of the underlying mechanism(s) essential to the successful treatment of ISR allowing for a tailored selection of treatment modalities. SUMMARY: The successful treatment of DES ISR requires identification of the causative mechanism(s). Individualized treatment may include high-pressure balloon angioplasty alone, cutting or scoring balloons, intravascular lithotripsy, atheroablative therapies and a selection of either repeat DES implantation or drug-coated balloon treatment.

Vascular Closure Devices For Axillary Artery Access: A Systematic Review and Meta-Analysis.

PURPOSE: To evaluate the technical success and complication rates of vascular closure devices (VCDs) in the axillary artery. MATERIALS AND METHODS: MEDLINE and Embase were searched independently by two reviewers to identify observational studies from inception through October 2021. The following outcomes were meta-analyzed: technical success, hematoma, dissection, pseudoaneurysm, infection, and local neurological complications. Complications were also graded as mild, moderate, and severe. A logistic regression evaluating the influence of sheath size for the outcome of technical success rate was performed using individual patient-level data. RESULTS: Of 1496 unique records, 20 observational studies were included, totaling 915 unique arterial access sites. Pooled estimates were as follows: technical success 84.8% (95% confidence interval [CI]: 78%-89.7%, I2=60.4%), hematoma 7.9% (95% CI: 5.8%-10.6%, I2=0%), dissection 3.1% (95% CI: 1.3%-7.3%, I2=0%), pseudoaneurysm 2.7% (95% CI: 1.3%-5.7%, I2=0%), infection <1% (95% CI: 0%-5.7%, I2=20.5%), and local neurological complications 2.7% (95% CI: 1.7%-4.4%, I2=0%). There was a significant negative association between sheath size and technical success rate (odds ratio [OR]: 0.87 per 1 French (Fr) increase in sheath size, 95% CI: 0.80-0.94, p=0.0005). Larger sheath sizes were associated with a greater number of access-site complications (adjusted odds ratio [aOR]: 1.21 per 1 Fr increase sheath size, 95% CI: 1.04-1.40, p=0.013). CONCLUSIONS: Off-label use of VCDs in the axillary artery provides an 85% successful closure rate and variable complication rate, depending on the primary procedure and sheath size. Larger sheaths were associated with a lower technical success and greater rate of access-related complications. CLINICAL IMPACT: Safe arterial access is the foundation for arterial intervention. While the common femoral artery is a well established access site, alternative arterial access sites capable of larger sheath sizes are needed in the modern endovascular era. This article provides the largest synthesis to date on the use of vascular closure devices for percutaneous axillary artery access in endovascular intervention. It should serve clinicians with added confidence around this approach in terms of providing a reference for technical success and complications. Clinically, this data is relevant for patient consent purposes as well as for practice quality improvement in setting safety standards for this access site.

Clinical expert consensus document on the use of percutaneous left ventricular assist devices during complex high-risk PCI in India using a standardised algorithm.

Over the past decade, percutaneous left ventricular assist devices (pLVAD), such as the Impella microaxial flow pump (Abiomed), have been increasingly used to provide haemodynamic support during complex and high-risk revascularisation procedures to reduce the risk of intraprocedural haemodynamic compromise and to facilitate complete and optimal revascularisation. A global consensus on patient selection for the use of pLVADs, however, is currently lacking. Access to these devices is different across the world, thus, individual health care environments need to create and refine patient selection paradigms to optimise the use of these devices. The Impella pLVAD has recently been introduced in India and is being used in several centres in the management of high-risk percutaneous coronary intervention (PCI) and cardiogenic shock. With this increasing utilisation, there is a need for a standardised evaluation protocol to guide Impella use that factors in the unique economic and infrastructural characteristics of India's health care system to ensure that the needs of patients are optimally managed. In this consensus document, we present an algorithm to guide Impella use in Indian patients: to establish a standardised patient selection and usage paradigm that will allow both optimal patient outcomes and ongoing data collection.

3D Printing of Subclavian Artery: Utility for Preprocedural Planning and Correlation With Subclavian Artery Percutaneous Vascular Interventions.

BACKGROUND: Three-dimensional (3D) printing for subclavian artery (SA) percutaneous vascular interventions (PVI) may allow superior understanding of patient specific complex anatomy and aid with preprocedural planning. METHODS: Five patients with computed tomography angiography (CTA) of the neck who underwent SA PVI were queried retrospectively. 3D printing of aortic arch and great vessels was accomplished with 3D slicer software and painted with acrylic paint to highlight anatomic features. The aortic arch type and implications for preprocedural planning for SA interventions including complex chronic total occlusion (CTO) lesions were determined. Comparisons were made with SA angiograms and 3D-CTA. RESULTS: Of the 5 patients, type I (n = 2), type II (n = 1), and type III (n = 2) aortic arches were identified. Proximal and distal reference vessel size and total lesion length were determined using a digital millimeter caliper and correlated with intraprocedural balloons and stents. In 3D-printed models (3D-PMs) of patients with SA-CTO (n = 2), cap morphology (tapered vs blunt) and distal vessel filling were visualized, permitting optimal arterial access site selection for successful cap crossing. The vertebral arteries (VAs) were also 3D printed which further allowed the ability to delineate optimal stent deployment site (proximal or distal to VA), a common dilemma that is faced intraprocedurally. The 3D-PMs also allowed preprocedural precision in stent and balloon size and length, potentially leading to procedural efficiency and cost-effectiveness. CONCLUSION: 3D printing of aortic arch and great vessel anatomy for SA-PVI allows multiple procedure-related factors to be predicted in advance, translating to decrease in contrast volume, radiation time, procedure and fluoroscopic time, thereby improving procedure and cost efficiency.

Association between sex and survival after non-traumatic out of hospital cardiac arrest: A systematic review and meta-analysis.

BACKGROUND: Existing studies have shown conflicting results regarding the relationship of sex with survival after out of hospital cardiac arrest (OHCA). This systematic review evaluates the association of female sex with survival to discharge and survival to 30 days after non-traumatic OHCA. METHODS: We searched Medline, Embase, CINAHL, Web of Science, Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews from inception through June 2021 for studies evaluating female sex as a predictor of survival in adult patients with non-traumatic cardiac arrest. Random-effects inverse variance meta-analyses were performed to calculate pooled odds ratios (ORs) with 95% confidence intervals (CI). The GRADE approach was used to assess evidence quality. RESULTS: Thirty studies including 1,068,788 patients had female proportion of 41%. There was no association for female sex with survival to discharge (OR 1.03, 95% CI 0.95-1.12; I2 = 89%). Subgroup analysis of low risk of bias studies demonstrated increased survival to discharge for female sex (OR 1.20, 95% CI 1.18-1.23; I2 = 0%) and with high certainty, the absolute increase in survival was 2.2% (95% CI 0.1-3.6%). Female sex was not associated with survival to 30 days post-OHCA (OR 1.02, 95% CI 0.92-1.14; I2 = 79%). CONCLUSIONS: In adult patients experiencing OHCA, with high certainty in the evidence from studies with low risk of bias, female sex had a small absolute difference for the outcome survival to discharge and no difference in survival at 30 days. Future models that aim to stratify risk of survival post-OHCA should focus on sex-specific factors as opposed to sex as an isolated prognostic factor.

Contemporary National Trends and Outcomes of Pulmonary Embolism in the United States.

Contemporary data on the national trends in pulmonary embolism (PE) admissions and outcomes are scarce. We aimed to analyze trends in mortality and different treatment methods in acute PE. We queried the Nationwide Readmissions Database (2016 to 2019) to identify hospitalizations with acute PE using the International Classification of Diseases, Tenth Revision, Clinical Modification codes. We described the national trends in admissions, in-hospital mortality, readmissions, and different treatment methods in acute PE. We identified 1,427,491 hospitalizations with acute PE, 2.4% of them (n = 34,446) were admissions with high-risk PE. The rate of in-hospital mortality in all PE hospitalizations was 6.5%, and it remained unchanged throughout the study period. However, the rate of in-hospital mortality in high-risk PE decreased from 48.1% in the first quarter of 2016 to 38.9% in the last quarter of 2019 (p-trend <0.001). The rate of urgent 30-day readmission was 15.2% in all PE admissions and 19.1% in high-risk PE admissions. In all PE admissions, catheter-directed interventions (CDI) were used more often (2.5%) than systemic thrombolysis (ST) (2.1%). However, in admissions with high-risk PE, ST remained the most frequently used method (ST vs CDI: 11.3% vs 6.6%). In conclusion, this study showed that the rate of in-hospital mortality in high-risk PE decreased from 2016 to 2019. ST was the most frequently used method for achieving pulmonary reperfusion in high-risk PE, whereas CDI was the most frequently used method in the entire PE cohort. In-hospital death and urgent readmissions rates remain significantly high in patients with high-risk PE.

3D Printing for Mesenteric Artery Endovascular Interventions: Feasibility and Utility for Preprocedural Planning and Angiographic Correlation.

BACKGROUND: Three-dimensional (3D) printing of mesenteric artery (MA) anatomy preprocedurally for endovascular interventions can allow strategic preprocedure planning and improve procedure-related clinical outcomes. METHODS: Three patients with computed tomography angiography (CTA) of the abdomen and pelvis who subsequently underwent MA interventions were 3D printed retrospectively, and 2 patients with symptoms and severe MA stenosis on CTA, who had not undergone intervention, were 3D printed for procedure-related planning and anatomy-specific implications. The 3D-printed models (3D-PMs) were painted with acrylic paint to highlight anatomy. Reference vessel size, lesion length (LL), and renal artery (RA) to MA distance were determined using a digital millimeter caliper. RESULTS: Each of the 5 patients with variable anatomy, including an MA chronic total occlusion (CTO), were successfully 3D printed. A digital caliper allowed determination of vessel size, LL, and RA to MA distance, which were then compared with intraprocedural MA angiograms and intravascular imaging when available. Further complex anatomies, such as intraprocedural navigation in the setting of prior abdominal aortic endograft and CTO assessment with relevance to cap morphology, small branch arteries, and collateral flow, were also successfully 3D printed. CONCLUSION: Preprocedural 3D printing of MA anatomy for interventions can theoretically lead to decreases in contrast use, radiation dose, and fluoroscopic and procedural times, as well as enhance comprehension of complex patient-specific anatomy.

Complications of Penumbra Indigo Aspiration Device in Pulmonary Embolism: Insights From MAUDE Database.

BACKGROUND: The Penumbra Indigo aspiration system (Penumbra Inc., Alameda, CA, USA) is a suction embolectomy device that was cleared by the Food and Drug Administration for use in acute pulmonary embolism (PE). While this device has proven to be safe in clinical trials, real-world data are minimal. METHODS: The "Manufacturer and User Facility Device Experience" MAUDE database was queried for reports of Penumbra indigo system from January 2020 to August 2021. RESULTS: A total of 2118 reports were found during the study period. After the exclusion of duplicate and incomplete reports as well as reports not related to PE, our final cohort included 67 reports related to Penumbra indigo device failure. The most common failure mode was Lightning unit malfunction (35.8%, n = 24) followed by rotating hemostasis valve malfunction (31.3%, n = 21). Three (4.5%) patients died; two (3%) from fatal pulmonary vessel perforation, and one from fatal right-sided heart failure. There was one case (1.5%) of pericardial effusion, while there were no cases of hemoptysis or blood transfusion. CONCLUSION: The overall number of reports in the MAUDE registry related to the Penumbra Indigo aspiration system is small (67 reports in 20 months). The most common reported failure mode was Lightning unit malfunction. These data serve to inform operators about potential issues when using the Penumbra Indigo thrombus aspiration system and identify areas on which to focus further device iteration.

Overview of Contemporary Chronic Total Occlusion Percutaneous Coronary Intervention Techniques: A Narrative Systematic Review.

BACKGROUND: Despite the abundance of coronary chronic total occlusions (CTO) percutaneous coronary intervention (PCI) studies, the literature is not easy to digest for both general PCI operators and CTO PCI specialists because of the many varied terms used for approaches and inconsistency in terminology. This inconsistency makes it challenging to understand the advantages and disadvantages of these different approaches and, most importantly, their downstream clinical outcomes. Accordingly, we conducted a systematic review of all published studies on CTO PCI to describe techniques and algorithms used in the last decade to provide an overview on the efficacy and safety of contemporary CTO PCI techniques. METHODS: We performed a comprehensive search of the PubMed, EMBASE, and the Cochrane library databases for manuscripts about PCI of CTOs. We included studies published between the years 2005 and 2019. We categorized studies into those using a single approach (antegrade, retrograde) and those with a prespecified algorithm (ie, hybrid approach). RESULTS: Fifty-five observational studies including 28,907 patients who underwent CTO were included in this review. CTO PCI generally carries low risk of major procedural complications, with angiographic success rates being higher in studies that used an algorithmic vs single technical approach. CONCLUSIONS: This systematic review highlights the wide variation in definitions and practices in CTO PCI and calls for standardization in terminology and practice.

CONTEXTE: Malgré l'abondance d'études sur l'intervention coronarienne percutanée (ICP) en cas d'occlusion totale chronique (OTC), la littérature n'est pas facile à assimiler, tant pour les opérateurs généraux qui effectuent des ICP que pour les spécialistes des ICP en cas d'OTC, en raison des nombreux termes utilisés pour les approches et de l'incohérence sur le plan de la terminologie. Cette incohérence rend difficile la compréhension des avantages et des inconvénients de ces différentes approches et, surtout, de leurs résultats cliniques en aval. Nous avons donc procédé à une revue systématique de toutes les études publiées sur l'ICP en cas d'OTC afin de décrire les techniques et les algorithmes utilisés au cours de la dernière décennie et de donner un aperçu de l'efficacité et de l'innocuité des techniques contemporaines d'ICP en cas d'OTC. MÉTHODOLOGIE: Nous avons effectué une recherche exhaustive dans les bases de données PubMed, EMBASE et Cochrane Library pour trouver des articles sur l'ICP en cas d'OTC. Nous avons retenu les études publiées entre 2005 et 2019. Nous avons classé ces études en deux catégories : celles qui utilisent une seule approche (antérograde, rétrograde) et celles qui utilisent un algorithme prédéfini (approche hybride). RÉSULTATS: Cette revue portait sur 55 études observationnelles, pour un total de 28 907 patients présentant des OTC. L'ICP en cas d'OTC comporte généralement un faible risque de complications importantes liées aux interventions, les taux de réussite angiographique étant plus élevés pour les études où une approche algorithmique était utilisée que pour celles où l'on recourait à une approche technique unique. CONCLUSIONS: Cette revue systématique souligne la grande variation des définitions et des pratiques en matière d'ICP en cas d'OTC, ainsi que le besoin d'une normalisation de la terminologie et de la pratique.

3D Printing of Renal Arteries for Endovascular Interventions: Feasibility, Utility, and Correlation With Renal Arteriograms.

BACKGROUND: Three-dimensional (3D) printing technology is increasingly being utilized for preprocedural planning of interventional procedures. However, utility of 3D models of obstructive and clinically relevant renal artery disease has not been evaluated and could potentially assist in preprocedural planning of renal artery endovascular interventions. METHODS: Five patients with computed tomography angiography (CTA) of abdomen and pelvis who also subsequently underwent renal artery interventions were 3D printed retrospectively. Standard 3D slicer software was used to segment out descending aorta, renal artery, and renal anatomy to create a computer aided image. The 3D-printed models (3D-PMs) were painted with acrylic paint to highlight anatomic features for comparison with renal arteriograms and 3D-CTA to aid in endovascular interventions. RESULTS: 3D-PMs were successfully produced in diverse renal artery pathology: atherosclerotic disease, fibromuscular dysplasia, in-stent restenosis, and bilateral renal artery stenosis. Renal artery ostium angulation and optimal axial guiding catheter engagement were elucidated. Additionally, reference vessel size and lesion length were measured using digital millimeter calipers. Renal arteriogram along with renal interventional devices utilized during each case were compared for size correlation, reproducibility, and clinical utility. CONCLUSION: Preprocedural 3D printing of renal artery anatomy requiring endovascular intervention could allow for better appreciation of renal anatomy and could serve as an adjunctive tool to minimize use of contrast, fluoroscopy, and procedure time.

Risk Prediction in Cardiogenic Shock: Current State of Knowledge, Challenges and Opportunities.

Cardiogenic shock (CS) is a condition associated with high mortality rates in which prognostication is uncertain for a variety of reasons, including its myriad causes, its rapidly evolving clinical course and the plethora of established and emerging therapies for the condition. A number of validated risk scores are available for CS prognostication; however, many of these are tedious to use, are designed for application in a variety of populations and fail to incorporate contemporary hemodynamic parameters and contemporary mechanical circulatory support interventions that can affect outcomes. It is important to separate patients with CS who may recover with conservative pharmacological therapies from those in who may require advanced therapies to survive; it is equally important to identify quickly those who will succumb despite any therapy. An ideal risk-prediction model would balance incorporation of key hemodynamic parameters while still allowing dynamic use in multiple scenarios, from aiding with early decision making to device weaning. Herein, we discuss currently available CS risk scores, perform a detailed analysis of the variables in each of these scores that are most predictive of CS outcomes and explore a framework for the development of novel risk scores that consider emerging therapies and paradigms for this challenging clinical entity.

3D Printing of Carotid Artery and Aortic Arch Anatomy: Implications for Preprocedural Planning and Carotid Stenting.

BACKGROUND: Carotid artery stenting (CAS) has been associated with increased periprocedural stroke in comparison with carotid endarterectomy (CEA). Three-dimensional (3D) printing of aortic arch and carotid artery may aid with preprocedural planning and adaptive learning, possibly reducing procedure-related complications. METHODS: Five CAS cases with available computed tomography angiography (CTA) were retrospectively evaluated and 3D-printed models (3D-PMs) were made. One additional case that was 3D printed preprocedurally provided prospective analysis. Standard 3D printing software was used to create a computer-aided image from CTA series that were 3D printed. The models were painted with acrylic paint to highlight anatomical features. The type of aortic arch, common carotid artery (CCA) to internal carotid artery (ICA) angle, and ICA distal landing zone for embolic protection device (EPD) were analyzed. In addition, stent and EPD sizing was determined preprocedurally for the prospective case. Comparisons of 3D-PM were made with 3D-CTA reconstruction and carotid angiography. RESULTS: Of 6 cases, 2 had type III and 4 had type I aortic arches. One case, a failed endovascular approach from femoral artery access site requiring reattempt via right brachial artery, had a CCA to ICA angle >60° and a tortuous innominate artery and distal ICA for EPD. The remaining 5 cases had straight distal landing zones for EPD and <60° CCA to ICA angles with successful first endovascular attempt. Additionally, vessel-specific stent and EPD sizing was appropriately chosen for the 1 prospective case. CONCLUSIONS: 3D-PM for CAS offers added value compared with CTA by providing improved perceptual and visual understanding of 3D anatomy.

Patient-Specific Coronary Artery Bypass Graft 3D Printing: Implications for Procedural Planning in Complex Percutaneous Coronary Interventions.

BACKGROUND: Three-dimensional (3D) printing technology has seen tremendous growth in augmenting didactics, research, and preprocedural planning with structural heart procedures. Limited investigative efforts have been made in other areas of the cardiovascular spectrum. 3D-printed models (PMs) of anatomically complex coronary artery bypass graft (CABG) patients from coronary computed tomography angiography (CCTA) have implications for adaptive learning and preprocedural planning. METHODS: Five patients with CCTA who underwent subsequent coronary angiography were 3D printed for retrospective comparisons. Standard slicer software was used to create a computer-aided image of the ascending aorta, native coronary arteries, bypass grafts, aortic arch, and great vessels and 3D printed using polylactic acid filament. The models were painted with acrylic paint to highlight anatomical features and comparison was made with coronary angiography and 3D-CTA images. RESULTS: All occluded vein grafts, left and right internal mammary artery (IMA) grafts, patent saphenous vein grafts, along with distal graft anastomotic sites, were accurately 3D printed. In cases with chronic total occlusions (CTOs), ambiguous ostial caps, mid or distal vessel chronic occlusions, and occlusions seen as CTOs on coronary angiography were 3D printed showing either distal vessel reconstitution via collaterals or complete arterial filling seen in a setting of calcification, microchannels, and collateral flow. Lastly, 3D printing of the aortic root and great vessels allowed for better appreciation of vessel tortuosity to aid in the cannulation of IMA grafts and optimizing engagement with diagnostic and guiding catheters. CONCLUSIONS: 3D printing of anatomically complex CABG patients has the potential to assist with preprocedural planning and operator understanding of complex coronary anatomy.

Coronary artery disease in patients with cancer: challenges and opportunities for improvement.

PURPOSE OF REVIEW: Coronary artery disease (CAD) is a common comorbidity in patients with cancer. We review shared risk factors between the two diseases and cancer treatments that increase the risk of CAD. We also discuss outcomes and management considerations of patients with cancer who develop CAD. RECENT FINDINGS: Several traditional and novel risk factors promote the development of both CAD and cancer. Several cancer treatments further increase the risk of CAD. The presence of cancer is associated with a higher burden of comorbidities and thrombocytopenia, which predisposes patients to higher bleeding risks. Patients with cancer who develop acute coronary syndromes are less likely to receive timely revascularization or appropriate medical therapy, despite evidence showing that receipt of these interventions is associated with substantial benefit. Accordingly, a cancer diagnosis is associated with worse outcomes in patients with CAD. The risk-benefit balance of revascularization is becoming more favorable due to the improving prognosis of many cancers and safer revascularization strategies, including shorter requirements for dual antiplatelet therapy after revascularization. SUMMARY: Several factors increase the complexity of managing CAD in patients with cancer. A multidisciplinary approach is recommended to guide treatment decisions in this high-risk and growing patient group.