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Lombardi M, Chiabrando JG, Romagnoli E, D'Amario D, Leone AM, Aurigemma C, Montone RA, Ricchiuto A, Biondi-Zoccai G, Burzotta F, Jang IK, Escaned J, Trani C, Porto I, Crea F, Vergallo R. Impact of acute and persistent stent malapposition after percutaneous coronary intervention on adverse cardiovascular outcomes. Minerva Cardiol Angiol 2023; 71:525-534. [PMID: 36912166 DOI: 10.23736/s2724-5683.22.06185-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
INTRODUCTION The association of coronary stent malapposition (SM) and adverse clinical outcomes after percutaneous coronary intervention (PCI) remains unclear. We aimed to perform a systematic review and meta-analysis of randomized and observational studies to assess the association between acute and persistent SM detected using intravascular ultrasound (IVUS) or optical coherence tomography (OCT) and adverse cardiovascular outcomes. EVIDENCE ACQUISITION Available studies were identified through a systematic search of PubMed, reference lists of relevant articles, and Medline. Main efficacy outcomes of interest were: device-oriented composite endpoint (DoCE, including cardiac death, myocardial infarction [MI], target lesion revascularization [TLR], and stent thrombosis [ST]), major safety events (MSE, including cardiac death, MI and ST), TLR, and ST. A sensitivity analysis regarding the impact of major malapposition was also performed. EVIDENCE SYNTHESIS A total of 9 studies enrolling 6497 patients were included in the meta-analysis. After a mean follow-up of 24±14 months, overall acute and/or persistent malapposition was not significantly associated with the occurrence of all the outcomes of interest, including DoCE (risk ratio [RR] 1.00, 95% confidence interval [CI, 0.79-1.26], P=0.99), MSE (RR 1.42, 95%CI [0.81-2.50], P=0.22), TLR (RR 0.84, 95%CI [0.59-1.19], P=0.33), and ST (RR 1.16, 95%CI [0.48-2.85], P=0.74). In the sensitivity analysis, we found a significant increase of MSE in patients with major malapposition (RR 2.97, 95%CI [1.51-5.87], P=0.001). CONCLUSIONS Acute and persistent SM were not overall associated with adverse cardiovascular clinical outcomes at follow-up. However, major malapposition was associated with an increased risk of major safety events, including cardiac death, MI and ST. These findings should be taken into account during stent implantation and PCI optimization.
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Affiliation(s)
- Marco Lombardi
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Juan G Chiabrando
- Interventional Cardiology Department, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Enrico Romagnoli
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Domenico D'Amario
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Antonio M Leone
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Cristina Aurigemma
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Rocco A Montone
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Alfredo Ricchiuto
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Giuseppe Biondi-Zoccai
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina, Italy
- Mediterranea Cardiocentro, Naples, Italy
| | - Francesco Burzotta
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Ik-Kyung Jang
- Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Javier Escaned
- Department of Cardiology, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
| | - Carlo Trani
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Italo Porto
- Cardiothoracic and Vascular Department (DICATOV), IRCCS San Martino Hospital, Genoa, Italy
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, Genoa, Italy
| | - Filippo Crea
- Department of Cardiovascular and Pulmonary Sciences, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Rocco Vergallo
- Cardiothoracic and Vascular Department (DICATOV), IRCCS San Martino Hospital, Genoa, Italy -
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, Genoa, Italy
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Nafee T, Shah A, Forsberg M, Zheng J, Ou J. State-of-art review: intravascular imaging in percutaneous coronary interventions. CARDIOLOGY PLUS 2023; 8:227-246. [PMID: 38304487 PMCID: PMC10829907 DOI: 10.1097/cp9.0000000000000069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 12/05/2023] [Indexed: 02/03/2024] Open
Abstract
The history of intravascular ultrasound (IVUS) and optical coherence tomography (OCT) reflects the relentless pursuit of innovation in interventional cardiology. These intravascular imaging technologies have played a pivotal role in our understanding of coronary atherosclerosis, vascular pathology, and the interaction of coronary stents with the vessel wall. Two decades of clinical investigations demonstrating the clinical efficacy and safety of intravascular imaging modalities have established these technologies as staples in the contemporary cardiac catheterization lab's toolbox and earning their place in revascularization clinical practice guidelines. In this comprehensive review, we will delve into the historical evolution, mechanisms, and technical aspects of IVUS and OCT. We will discuss the expanding evidence supporting their use in complex percutaneous coronary interventions, emphasizing their crucial roles in optimizing patient outcomes and ensuring procedural success. Furthermore, we will explore the substantial advances that have propelled these imaging modalities to the forefront of contemporary interventional cardiology. Finally, we will survey the latest developments in the field and explore the promising future directions that have the potential to further revolutionize coronary interventions.
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Affiliation(s)
- Tarek Nafee
- Cardiovascular Division, Department of Medicine, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
- The Division of Cardiology, Department of Medicine, John Cochran Veterans Affairs Medical Center, St. Louis, MO 63106, USA
| | - Areeb Shah
- Cardiovascular Division, Department of Medicine, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Michael Forsberg
- Cardiovascular Division, Department of Medicine, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
- The Division of Cardiology, Department of Medicine, John Cochran Veterans Affairs Medical Center, St. Louis, MO 63106, USA
| | - Jingsheng Zheng
- Department of Cardiology, AtlantiCare Regional Medical Center, Pomona, NJ 08240, USA
| | - Jiafu Ou
- The Division of Cardiology, Department of Medicine, John Cochran Veterans Affairs Medical Center, St. Louis, MO 63106, USA
- Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
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3
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Ali ZA, Karimi Galougahi K, Thomas SV, Abu-Much A, Chau K, Dakroub A, Shlofmitz ES, Jeremias A, West N, Matsumura M, Mintz GS, Maehara A, Shlofmitz RA. Optical Coherence Tomography-Guided Percutaneous Coronary Intervention: Practical Application. Interv Cardiol Clin 2023; 12:215-224. [PMID: 36922062 DOI: 10.1016/j.iccl.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Optical coherence tomography (OCT) provides high-resolution imaging of coronary arteries and can be used to optimize percutaneous coronary intervention (PCI). Intracoronary OCT, however, has had limited adoption in clinical practice. Novelty and relative complexity of OCT interpretation compared with the more established intravascular ultrasound, lack of a standardized algorithm for PCI guidance, paucity of data from randomized trials, and lack of rebate for intravascular imaging have contributed to the modest practical adoption of OCT. We provide a practical step-by-step guide on how to use OCT in PCI, including device set-up, simplified image interpretation, and an algorithmic approach for PCI. optimization.
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Affiliation(s)
- Ziad A Ali
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA; Cardiovascular Research Foundation, 1700 Broadway, New York, NY 10029, USA.
| | - Keyvan Karimi Galougahi
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA
| | - Susan V Thomas
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA
| | - Arsalan Abu-Much
- Cardiovascular Research Foundation, 1700 Broadway, New York, NY 10029, USA
| | - Karen Chau
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA
| | - Ali Dakroub
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA
| | - Evan S Shlofmitz
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA
| | - Allen Jeremias
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA; Cardiovascular Research Foundation, 1700 Broadway, New York, NY 10029, USA
| | - Nick West
- Abbott Vascular, 3200 Lakeside Drive #5314, Santa Clara, CA 95054, USA
| | - Mitsuaki Matsumura
- Cardiovascular Research Foundation, 1700 Broadway, New York, NY 10029, USA
| | - Gary S Mintz
- Cardiovascular Research Foundation, 1700 Broadway, New York, NY 10029, USA
| | - Akiko Maehara
- Cardiovascular Research Foundation, 1700 Broadway, New York, NY 10029, USA
| | - Richard A Shlofmitz
- Department of Cardiology, St Francis Hospital, 100 Port Washington Boulevard, Roslyn, NY 11576, USA
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Daoud FC, Létinier L, Moore N, Coste P, Karjalainen PP. Efficacy and Safety of TiNO-Coated Stents versus Drug-Eluting Stents in Acute Coronary Syndrome: Systematic Literature Review and Meta-Analysis. Biomedicines 2022; 10:3159. [PMID: 36551915 PMCID: PMC9775300 DOI: 10.3390/biomedicines10123159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/16/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
(1) Background: Practice guidelines define drug-eluting stents (DES) as the standard of care in coronary percutaneous coronary intervention (PCI), including in acute coronary syndrome (ACS). This is based on comparisons with bare-metal stents (BMS). However, non-drug-eluting titanium-nitride-oxide-coated stents (TiNOS) have not been taken into account. The objective of this study is to determine whether TiNOS can be used as an alternative to DES in ACS. (2) Methods: A prospective systematic literature review (SLR), conducted according to the PRISMA guidelines, was performed, wherein multiple literature databases from 2018 and 2022 were searched. Prospective, randomised, controlled trials comparing outcomes after PCI with TiNOS vs. DES in any coronary artery disease (CAD) were searched. Clinical outcomes were meta-analytic pooled risk ratios (RR) of device-oriented Major Adverse Cardiac Events (MACE) and their components. The analysis stratified outcomes reported with ACS-only vs. ACS jointly with chronic coronary syndrome (CCS). (3) Results: Five RCTs were eligible, comprising 1855 patients with TiNOS vs. 1363 with DES at a 1-year follow-up. Three enrolled patients presented with ACS only and two with ACS or CCS. The latter accounted for most of the patients. The one-year pooled RRs in those three RCTs were as follows: MACE 0.93 [0.72, 1.20], recurrent myocardial infarction (MI) 0.48 [0.31, 0.73], cardiac death (CD) 0.66 [0.33, 1.31], clinically driven target lesion revascularization (TLR) 1.55 [1.10, 2.19], and stent thrombosis (ST) 0.35 [0.20, 0.64]. Those results were robust to a sensitivity analysis. The evidence certainty was high in MACE and moderate or low in the other endpoints. (4) Conclusions: TiNOS are a non-inferior and safe alternative to DES in patients with ACS.
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Affiliation(s)
| | - Louis Létinier
- INSERM, BPH, U1219, Bordeaux University, 33000 Bordeaux, France
| | - Nicholas Moore
- INSERM, BPH, U1219, Bordeaux University, 33000 Bordeaux, France
| | - Pierre Coste
- Coronary Care Unit, Cardiologic Hospital, Bordeaux University, 33604 Pessac, France
| | - Pasi P. Karjalainen
- Cardiac Unit, Heart and Lung Center, Helsinki University Hospital, Helsinki University, 00280 Helsinki, Finland
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Moretti F, Bernelli C, Pellegrini D, Boccuzzi G, Colombo F, Sirbu V, Vassileva A, Fiocca L, Canova P, Bezerra H, Pereira GTR, Cereda A, De Luca L, Saia F, Capodanno D, Guagliumi G. Determinants and long-term outcomes of largely uncovered struts in thin-struts drug-eluting stents assessed by optical coherence tomography. Catheter Cardiovasc Interv 2022; 100 Suppl 1:S25-S35. [PMID: 36661369 DOI: 10.1002/ccd.30379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/30/2022] [Accepted: 08/12/2022] [Indexed: 01/21/2023]
Abstract
BACKGROUND Uncovered struts are a determinant of stent failure. The impact of plaque composition and procedural factors on the occurrence, evolution, and outcomes of uncovered struts in a high-risk setting has not been investigated. OBJECTIVE To investigate the determinants and long-term clinical impact of largely uncovered struts (LUS) in thin-struts drug-eluting stents (DES) implanted in complex lesions by intracoronary optical coherence tomography (OCT). METHODS Ninety patients with multivessel disease undergoing staged complete revascularization were randomly assigned to bioabsorbable or durable polymer DES. OCT were serially performed during the index procedure, at 3- and 18-month follow-up, and analyzed by an independent core lab. Struts were defined uncovered by OCT if no tissue was visible above the struts. LUS were defined as ≥30% of uncovered struts at 3-month follow-up. Clinical outcomes were the occurrence of target vessel failure (TVF) and major adverse cardiac and cerebrovascular events (MACCE) at 5-year follow-up. RESULTS LUS occurred in 31 patients (34.4%) regardless of stent platform. At 5 years, no differences were observed in the rate of TVF (12.7% vs. 13.4%; p = 0.91) and MACCE (23.9% vs. 24.9%; p = 0.88) between the two groups. At multivariate logistic regression, plaque rupture, mean lumen diameter, proximal reference vessel area, and maximum stent deployment pressure were independent predictors of LUS. CONCLUSIONS LUS are a frequent finding in complex coronary lesions treated with thin-struts DES, especially in the presence of plaque rupture. However, in this study, no significant safety signal related to LUS emerged in long-term follow-up.
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Affiliation(s)
- Francesco Moretti
- Department of Cardiovascular, Ospedale Papa Giovanni XXIII, Bergamo, Italy.,Cardiology Unit, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Chiara Bernelli
- Division of Cardiology, Ospedale Santa Corona, Pietra Ligure, Italy
| | - Dario Pellegrini
- Department of Cardiovascular, Ospedale Papa Giovanni XXIII, Bergamo, Italy
| | - Giacomo Boccuzzi
- Department of Cardiovascular, Ospedale San Giovanni Bosco, Torino, Italy
| | - Francesco Colombo
- Department of Cardiovascular, Ospedale San Giovanni Bosco, Torino, Italy
| | - Vasile Sirbu
- Department of Cardiovascular, Ospedale Papa Giovanni XXIII, Bergamo, Italy.,Interventional Cardiology, Jilin Heart Hospital, Changchun, Jilin Province, China
| | - Angelina Vassileva
- Department of Cardiovascular, Ospedale Papa Giovanni XXIII, Bergamo, Italy
| | - Luigi Fiocca
- Department of Cardiovascular, Ospedale Papa Giovanni XXIII, Bergamo, Italy
| | - Paolo Canova
- Department of Cardiovascular, Ospedale Papa Giovanni XXIII, Bergamo, Italy
| | - Hiram Bezerra
- Cardiovascular Imaging Core Laboratory, University Hospital, Case Medical Centre, Cleveland, Ohio, USA
| | - Gabriel T R Pereira
- Cardiovascular Imaging Core Laboratory, University Hospital, Case Medical Centre, Cleveland, Ohio, USA
| | - Alberto Cereda
- Division of Cardiology, ASST Santi Paolo e Carlo, Milan, Italy
| | - Leonardo De Luca
- Department of Cardiosciences, Azienda Ospedaliera San Camillo-Forlanini, Roma, Italy
| | - Francesco Saia
- Department of Cardiothoracic Vascular, University Hospital, Bologna, Italy
| | - Davide Capodanno
- Department of Cardio-Thoracic-Vascular and Transplant, A.O.U. Vittorio Emanuele-Policlinico, University of Catania, Catania, Italy
| | - Giulio Guagliumi
- Department of Cardiovascular, Ospedale Papa Giovanni XXIII, Bergamo, Italy
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Improving PCI Outcomes Using Postprocedural Physiology and Intravascular Imaging. JACC Cardiovasc Interv 2021; 14:2415-2430. [PMID: 34794649 DOI: 10.1016/j.jcin.2021.08.069] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 07/07/2021] [Accepted: 08/03/2021] [Indexed: 11/24/2022]
Abstract
Although clinical outcomes after percutaneous coronary intervention (PCI) are improving, the long-term risk for target vessel failure remains concerning. Although the application of intravascular imaging and physiological indexes significantly improves outcomes, their routine use in practice remains limited. Nevertheless, merely using these modalities is not enough, and to truly improve patient outcomes, optimal intravascular dimensions with minimal vascular injury should be targeted. When assessing post-PCI results using either type of physiological or imaging technology, a broad spectrum of stent- and vessel-related anomalies can be expected. As not all of these issues warrant treatment, a profound knowledge of what to expect and how to recognize and when to treat these intraluminal problems is needed. Additionally, promising new modalities such as angiography-derived coronary physiology and hybrid imaging catheters are becoming available. The authors provide an overview of the currently available tools and techniques to define suboptimal PCI and when to apply these technologies to improve outcomes.
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Seto AH, Tehrani DM. Intravascular ultrasound: Beneficial even with ST-segment elevation myocardial infarction. Catheter Cardiovasc Interv 2021; 98:10-11. [PMID: 34219374 DOI: 10.1002/ccd.29817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 06/05/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Arnold H Seto
- Department of Medicine, Long Beach Veterans Administration Medical Center, Long Beach, California
| | - David M Tehrani
- Department of Medicine, University of California Los Angeles, Los Angeles, California
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Ali Z, Karimi Galougahi K, Mintz GS, Maehara A, Shlofmitz R, Mattesini A. Intracoronary optical coherence tomography: state of the art and future directions. EUROINTERVENTION 2021; 17:e105-e123. [PMID: 34110288 PMCID: PMC9725016 DOI: 10.4244/eij-d-21-00089] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Optical coherence tomography (OCT) has been increasingly utilised to guide percutaneous coronary intervention (PCI). Despite the diagnostic utility of OCT, facilitated by its high resolution, the impact of intracoronary OCT on clinical practice has thus far been limited. Difficulty in transitioning from intravascular ultrasound (IVUS), complex image interpretation, lack of a standardised algorithm for PCI guidance, and paucity of data from prospective clinical trials have contributed to the modest adoption. Herein, we provide a comprehensive up-do-date overview on the utility of OCT in coronary artery disease, including technical details, device set-up, simplified OCT image interpretation, recognition of the imaging artefacts, and an algorithmic approach for using OCT in PCI guidance. We discuss the utility of OCT in acute coronary syndromes, provide a summary of the clinical trial data, list the work in progress, and discuss the future directions.
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Affiliation(s)
- Ziad Ali
- St. Francis Hospital and Heart Center 100 Port Washington Blvd., Roslyn, NY 11576, USA
| | | | - Gary S. Mintz
- Clinical Trials Center, Cardiovascular Research Foundation, New York, NY, USA
| | - Akiko Maehara
- Clinical Trials Center, Cardiovascular Research Foundation, New York, NY, USA,Center for Interventional Vascular Therapy, Division of Cardiology, NewYork-Presbyterian Hospital/Columbia University Irving Medical Center, New York, NY, USA
| | - Richard Shlofmitz
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Alessio Mattesini
- Structural Interventional Cardiology Unit, Careggi University Hospital, Florence, Italy
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Computer Simulation of Platelet Adhesion around Stent Struts in the Presence and Absence of Tissue Defects around Them. J Interv Cardiol 2021; 2021:8880988. [PMID: 33628146 PMCID: PMC7895599 DOI: 10.1155/2021/8880988] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 01/06/2021] [Accepted: 01/28/2021] [Indexed: 11/17/2022] Open
Abstract
Aim To predict platelet accumulation around stent struts in the presence or absence of tissue defects around them. Methods Computer simulations were performed using virtual platelets implementing the function of the three membrane proteins: glycoprotein (GP) Ibα, GPIIb/IIIa, and GPVI. These platelets were perfused around the stent struts implanted into the vessel wall in the presence or absence of tissue defects around them using within the simulation platform. The number of platelets that adhered around stent struts was calculated by solving the blood flow using Navier-Stokes equation along with the adhesion of membrane protein modeled within the platform. Results Platelet accumulation around stent struts occurred mostly at the downstream region of the stent strut array. The majority of platelets adhered at the downstream of the first bend regardless of the tissue defect status. Platelet adhesion around stent struts occurred more rapidly in the presence of tissue defects. Conclusion Computer simulation using virtual platelets suggested a higher rate of platelet adhesion in the presence of tissue defects around stent struts.
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Lee SY, Mintz GS, Kim JS, Kim BK, Jang Y, Hong MK. Long-term Clinical Outcomes of Drug-Eluting Stent Malapposition. Korean Circ J 2020; 50:880-889. [PMID: 32812407 PMCID: PMC7515765 DOI: 10.4070/kcj.2020.0198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/12/2020] [Accepted: 07/14/2020] [Indexed: 11/11/2022] Open
Abstract
Previous pathologic, intravascular imaging, and clinical studies have investigated the association between adverse cardiac events and stent malapposition, including acute stent malapposition (ASM, that is detected at index procedure) and late stent malapposition (LSM, that is detected during follow-up) that can be further classified into late-persistent stent malapposition (LPSM, ASM that remains at follow-up) or late-acquired stent malapposition (LASM, newly developed stent malapposition at follow-up that was not present immediately after index stent implantation). ASM has not been associated with adverse cardiac events compared with non-ASM, even in lesions with large-sized malapposition. The clinical outcomes of LSM may depend on its subtype. The recent intravascular ultrasound studies with long-term follow-up have consistently demonstrated that LASM steadily increased the risk of thrombotic events in patients with first-generation drug-eluting stents (DESs). This association has not yet been identified in LPSM. Accordingly, it is reasonable that approaches to stent malapposition should be based on its relationship with clinical outcomes. ASM may be tolerable after successful stent implantation, whereas prolonged anti-thrombotic medications and/or percutaneous interventions to modify LASM may be considered in selected patients with first-generation DESs. However, these treatments are still questionable due to lack of firm evidences.
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Affiliation(s)
- Seung Yul Lee
- Regional Cardiocerebrovascular Center, Wonkwang University Hospital, Iksan, Korea
| | - Gary S Mintz
- Cardiovascular Research Foundation, New York, NY, USA
| | - Jung Sun Kim
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University Health System, Seoul, Korea
| | - Byeong Keuk Kim
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University Health System, Seoul, Korea
| | - Yangsoo Jang
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University Health System, Seoul, Korea
| | - Myeong Ki Hong
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University Health System, Seoul, Korea.
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Geith MA, Swidergal K, Hochholdinger B, Schratzenstaller TG, Wagner M, Holzapfel GA. On the importance of modeling balloon folding, pleating, and stent crimping: An FE study comparing experimental inflation tests. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2019; 35:e3249. [PMID: 31400057 PMCID: PMC9285761 DOI: 10.1002/cnm.3249] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 07/23/2019] [Accepted: 08/03/2019] [Indexed: 06/10/2023]
Abstract
Finite element (FE)-based studies of preoperative processes such as folding, pleating, and stent crimping with a comparison with experimental inflation tests are not yet available. Therefore, a novel workflow is presented in which residual stresses of balloon folding and pleating, as well as stent crimping, and the geometries of all contact partners were ultimately implemented in an FE code to simulate stent expansion by using an implicit solver. The numerical results demonstrate that the incorporation of residual stresses and strains experienced during the production step significantly increased the accuracy of the subsequent simulations, especially of the stent expansion model. During the preoperative processes, stresses inside the membrane and the stent material also reached a rather high level. Hence, there can be no presumption that balloon catheters or stents are undamaged before the actual surgery. The implementation of the realistic geometry, in particular the balloon tapers, and the blades of the process devices improved the simulation of the expansion mechanisms, such as dogboning, concave bending, or overexpansion of stent cells. This study shows that implicit solvers are able to precisely simulate the mentioned preoperative processes and the stent expansion procedure without a preceding manipulation of the simulation time or physical mass.
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Affiliation(s)
- Markus A. Geith
- Institute of BiomechanicsGraz University of TechnologyGrazAustria
- Biomedical Engineering DepartmentKing's College LondonUnited Kingdom
- Faculty of Mechanical EngineeringOstbayerische Technische Hochschule RegensburgGermany
| | - Krzysztof Swidergal
- Faculty of Mechanical EngineeringOstbayerische Technische Hochschule RegensburgGermany
| | | | | | - Marcus Wagner
- Faculty of Mechanical EngineeringOstbayerische Technische Hochschule RegensburgGermany
| | - Gerhard A. Holzapfel
- Institute of BiomechanicsGraz University of TechnologyGrazAustria
- Department of Structural EngineeringNorwegian University of Science and TechnologyTrondheimNorway
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Her AY, Singh GB, Chung JH, Lee SH, Kim HJ, Chung SH, Park WJ, Choi BJ, Hwang DS, Cho YW, Shin ES. Vasoconstrictor component of atherothrombotic culprit lesions in ST-segment elevation myocardial infarction. J Saudi Heart Assoc 2019; 31:114-120. [PMID: 31031550 PMCID: PMC6479068 DOI: 10.1016/j.jsha.2019.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/16/2019] [Accepted: 03/19/2019] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE The vasoconstrictor component of atherothrombotic culprit lesions in ST-elevation myocardial infarction (STEMI) patients has not been fully investigated. This study was aimed at assessing the vasoconstrictor component of atherothrombotic culprit lesions in patients with STEMI receiving primary percutaneous coronary intervention (PCI). METHODS A group of 100 patients with STEMI were enrolled prospectively. Baseline coronary angiography achieving normal antegrade flow was followed by 200 μg of intracoronary nitroglycerin (NTG) injection and repeat coronary angiography at the same projection view for culprit lesions was performed. End points were the changes in lesion length, reference vessel diameter, minimal lumen diameter, and diameter stenosis by quantitative coronary analysis before and after NTG injection. RESULTS Reference vessel diameter (2.7 ± 0.5 mm vs. 2.9 ± 0.5 mm, p < 0.001) and minimal lumen diameter (0.9 ± 0.4 mm vs. 1.2 ± 0.5 mm, p < 0.001) increased after NTG injection, whereas lesion length (24.1 ± 7.4 mm vs. 23.4 ± 7.6 mm, p = 0.001) and diameter stenosis (66.6 ± 14.8% vs. 58.3 ± 16.1%, p < 0.001) decreased. The median percentage change of diameter stenosis was -4.0% (Interquartile range: -13.8% to -1.0%), which was used as the cut-off value to divide the cohort into NTG responder or nonresponder groups accordingly. Total stent length was significantly shorter in the responder group compared with the nonresponder group (27.4 ± 11.6 mm vs. 33.7 ± 16.8 mm, p = 0.042). CONCLUSION This study showed the presence of a vasoconstrictor component in atherothrombotic culprit lesions in STEMI patients receiving primary PCI. Vasodilating effort by NTG may decrease stent length used for culprit lesions.
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Affiliation(s)
- Ae-Young Her
- Division of Cardiology, Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Republic of KoreaRepublic of Korea
| | - Gillian Balbir Singh
- Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of KoreaRepublic of Korea
| | - Ju-Hyun Chung
- Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of KoreaRepublic of Korea
| | - Su Hun Lee
- Department of Cardiology, Dongkang Medical Center, Ulsan, Republic of KoreaRepublic of Korea
| | - Hyung-Jun Kim
- Department of Cardiology, Dongkang Medical Center, Ulsan, Republic of KoreaRepublic of Korea
| | - Suk Hwan Chung
- Department of Cardiology, Dongkang Medical Center, Ulsan, Republic of KoreaRepublic of Korea
| | - Won-Jong Park
- Department of Cardiology, Dongkang Medical Center, Ulsan, Republic of KoreaRepublic of Korea
| | - Byung Joo Choi
- Department of Cardiology, Dongkang Medical Center, Ulsan, Republic of KoreaRepublic of Korea
| | - Dae Seong Hwang
- Department of Cardiology, Ulsan General Hospital, Ulsan, Republic of KoreaRepublic of Korea
| | - Young-Wan Cho
- Department of Cardiology, Ulsan General Hospital, Ulsan, Republic of KoreaRepublic of Korea
| | - Eun-Seok Shin
- Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of KoreaRepublic of Korea
- Corresponding author at: Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan 44033, Republic of Korea.
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13
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Ali ZA, Karimi Galougahi K, Shlofmitz RA, Mintz GS. The "Oculo-Appositional Reflex": Should Optical Coherence Tomography-Detected Stent Malapposition Be Corrected? J Am Heart Assoc 2019; 8:e012262. [PMID: 30907208 PMCID: PMC6509721 DOI: 10.1161/jaha.119.012262] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
See Article by Im et al
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Affiliation(s)
- Ziad A Ali
- 1 Division of Cardiology Center for Interventional Vascular Therapy Presbyterian Hospital and Columbia University New York NY.,2 Cardiovascular Research Foundation New York NY
| | - Keyvan Karimi Galougahi
- 1 Division of Cardiology Center for Interventional Vascular Therapy Presbyterian Hospital and Columbia University New York NY.,2 Cardiovascular Research Foundation New York NY.,3 Department of Cardiovascular Medicine University of Sydney Australia
| | | | - Gary S Mintz
- 2 Cardiovascular Research Foundation New York NY
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14
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Leone AM, Rebuzzi AG, Burzotta F, De Maria GL, Gardi A, Basile E, Cialdella P, D’Amario D, Paraggio L, Porto I, Aurigemma C, Niccoli G, Trani C, Crea F. Stent malapposition, strut coverage and atherothrombotic prolapse after percutaneous coronary interventions in ST-segment elevation myocardial infarction. J Cardiovasc Med (Hagerstown) 2019; 20:122-130. [DOI: 10.2459/jcm.0000000000000749] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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15
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Abdel-Karim ARR, Uretsky BF. The importance of malapposition in angiographically optimized stenting in contemporaneous interventions. Expert Rev Cardiovasc Ther 2018; 16:599-605. [DOI: 10.1080/14779072.2018.1493377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | - Barry F. Uretsky
- Division of Cardiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
- Division of Cardiology, Central Arkansas Veterans Healthcare System and the University of Arkansas for Medical Sciences, Little Rock, AR, USA
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16
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Song HG, Kang SJ, Mintz GS. Value of intravascular ultrasound in guiding coronary interventions. Echocardiography 2018; 35:520-533. [DOI: 10.1111/echo.13837] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Hae Geun Song
- Department of Cardiology; DeltaHealth Hospital; Shanghai China
| | - Soo-Jin Kang
- Department of Cardiology; Asan Medical Center; University of Ulsan College of Medicine; Seoul South Korea
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17
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Mori H, Finn AV. Illuminating Insights Into Stent Thrombosis. REVISTA ESPANOLA DE CARDIOLOGIA (ENGLISH ED.) 2017; 70:1036-1038. [PMID: 28709861 DOI: 10.1016/j.rec.2017.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 06/13/2017] [Indexed: 06/07/2023]
Affiliation(s)
| | - Aloke V Finn
- CVPath Institute, Gaithersburg, Maryland, United States; School of Medicine, University of Maryland, Baltimore, Maryland, United States.
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18
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Avances reveladores sobre la trombosis del stent. Rev Esp Cardiol (Engl Ed) 2017. [DOI: 10.1016/j.recesp.2017.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Low levels of apolipoprotein-CII in normotriglyceridemic patients with very premature coronary artery disease: Observations from the MISSION! Intervention study. J Clin Lipidol 2017; 11:1407-1414. [DOI: 10.1016/j.jacl.2017.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 07/24/2017] [Accepted: 08/03/2017] [Indexed: 11/16/2022]
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20
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Mintz GS, Guagliumi G. Intravascular imaging in coronary artery disease. Lancet 2017; 390:793-809. [PMID: 28831995 DOI: 10.1016/s0140-6736(17)31957-8] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/27/2017] [Accepted: 07/05/2017] [Indexed: 12/15/2022]
Abstract
Although it is the method used by most interventional cardiologists to assess the severity of coronary artery disease and guide treatment, coronary angiography has many known limitations, particularly the fact that it is a lumenogram depicting foreshortened, shadowgraph, planar projections of the contrast-filled lumen rather than imaging the diseased vessel itself. Intravascular imaging-intravascular ultrasound and more recently optical coherence tomography-provide a tomographical or cross-sectional image of the coronary arteries. These techniques are clinically useful to answer questions such as whether the stenosis is clinically relevant; the identification of the culprit lesion; or whether the plaque (or patient) is at high risk of future adverse events. They can also be used to optimise stent implantation to minimise stent-related adverse events, provide answers to the likelihood of distal embolisation or peri-procedural myocardial infarction during stent implantation, and provide reasons for stent thrombosis or restenosis. This review considers the usefulness of intravascular imaging in day-to-day practice.
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Affiliation(s)
- Gary S Mintz
- Cardiovascular Research Foundation, New York, NY, USA.
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21
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Long-term mortality in patients with ST-segment elevation myocardial infarction is associated with anti-citrullinated protein antibodies. Int J Cardiol 2017; 240:20-24. [DOI: 10.1016/j.ijcard.2017.04.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 04/17/2017] [Indexed: 02/07/2023]
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22
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Song HG, Kang SJ. Current Clinical Applications of Intravascular Ultrasound in Coronary Artery Disease. CURRENT CARDIOVASCULAR IMAGING REPORTS 2017. [DOI: 10.1007/s12410-017-9424-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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The fate of incomplete scaffold apposition of everolimus-eluting bioresorble scaffolds: A serial optical coherence tomography analysis. J Cardiol 2017; 70:454-460. [PMID: 28476635 DOI: 10.1016/j.jjcc.2017.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 02/22/2017] [Accepted: 03/07/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND Incomplete stent apposition (ISA) can be divided into acute and late forms. Late ISA may be due to persistent ISA or late-acquired ISA (LAISA). This study evaluated the natural course of ISA after bioresorbable vascular scaffold (BRS) implantation using optical coherence tomography (OCT). METHODS Thirty-two patients (45 BRS) were assessed immediately after BRS implantation and 1 year thereafter using OCT. Acute ISA identified after BRS implantation but absent at follow-up was defined as resolved; otherwise, it was considered persistent. LAISA was defined as newly developed ISA that was identified at follow-up despite complete apposition immediately after BRS implantation. Intra-BRS fibrin-like material (IBF) was identified as an irregular intraluminal mass. ISA percentage was expressed as follows: (number of ISA/total number of BRS struts)×100. RESULTS Among 45 BRS and 15,894 analyzed BRS struts, 34 and 882 had acute ISA post-procedure, respectively. At follow-up, 92 of 15,364 analyzed struts exhibited late ISA (64 persistent ISA and 28 LAISA). In 15 of 28 struts with LAISA, LAISA occurred at the sites adjacent to post-interventional dissection. Uncovered struts were more frequently observed in late ISA compared to apposed struts (3.7±4.8 vs. 0.58±2.2%, p=0.09). IBF was significantly more common in BRS with late ISA (62.5 vs. 8.1%, p=0.02). Receiver-operating characteristic curve analysis identified a cut-off value of 280μm for acute ISA distance predicting persistent ISA. CONCLUSION Resolution of acute ISA after BRS is common. The occurrence of LAISA may be infrequent and may be a nidus of stent thrombosis.
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24
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Wang B, Mintz GS, Witzenbichler B, Souza CF, Metzger DC, Rinaldi MJ, Duffy PL, Weisz G, Stuckey TD, Brodie BR, Matsumura M, Yamamoto MH, Parvataneni R, Kirtane AJ, Stone GW, Maehara A. Predictors and Long-Term Clinical Impact of Acute Stent Malapposition: An Assessment of Dual Antiplatelet Therapy With Drug-Eluting Stents (ADAPT-DES) Intravascular Ultrasound Substudy. J Am Heart Assoc 2016; 5:e004438. [PMID: 28007741 PMCID: PMC5210413 DOI: 10.1161/jaha.116.004438] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 11/21/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND The impact of acute stent malapposition (ASM) on long-term clinical outcomes in patients undergoing percutaneous coronary intervention is still controversial. We sought to evaluate predictors and long-term clinical outcomes of ASM. METHODS AND RESULTS ADAPT-DES (Assessment of Dual Antiplatelet Therapy With Drug-Eluting Stents) was a prospective multicenter study of 8663 patients undergoing percutaneous coronary intervention using drug-eluting stents. In a prespecified intravascular ultrasound-guided substudy, 2072 patients with 2446 culprit lesions had post-percutaneous coronary intervention intravascular ultrasound and were classified according to the presence or absence of ASM. After intravascular ultrasound-guided percutaneous coronary intervention, the overall prevalence of ASM after successful drug-eluting stents implantation was 14.4% per patient and 12.6% per lesion. Compared to lesions without ASM, lesions with ASM had larger in-stent lumen areas, larger stent areas, and larger in-stent vessel areas. A larger mean plaque area along with more attenuated plaque was observed in lesions with ASM versus lesions without ASM. Lesions with ASM had greater proximal and distal reference lumen areas and more distal, but not proximal, reference calcium compared to lesions without ASM. At 2-year follow-up, there was no significant difference in the incidence of cardiac death; myocardial infarction; early, late, or very late stent thrombosis; or clinically driven target lesion revascularization in patients with ASM versus those without ASM. Furthermore, ASM was not an independent predictor of 2-year major adverse cardiac events or target lesion revascularization even when forced into the multivariate model. CONCLUSIONS In patients treated with intravascular ultrasound-guided drug-eluting stents implantation, ASM was not associated with adverse clinical events during long-term follow-up including, but not limited to, stent thrombosis. CLINICAL TRIAL REGISTRATION URL: https://www.clinicaltrials.gov. Unique identifier: NCT00638794.
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Affiliation(s)
- Bin Wang
- Cardiovascular Research Foundation, New York, NY
- Columbia University Medical Center/NewYork-Presbyterian Hospital, New York, NY
- Shenyang Northern Hospital, Shenyang, China
| | - Gary S Mintz
- Cardiovascular Research Foundation, New York, NY
| | | | | | | | - Michael J Rinaldi
- Sanger Heart & Vascular Institute/Carolinas HealthCare System, Charlotte, NC
| | - Peter L Duffy
- Reid Heart Center, FirstHealth of the Carolinas, Pinehurst, NC
| | - Giora Weisz
- Cardiovascular Research Foundation, New York, NY
- Columbia University Medical Center/NewYork-Presbyterian Hospital, New York, NY
- Shaare Zedek Medical Center, Jerusalem, Israel
| | - Thomas D Stuckey
- LeBauer Cardiovascular Research Foundation/Cone Health, Greensboro, NC
| | - Bruce R Brodie
- LeBauer Cardiovascular Research Foundation/Cone Health, Greensboro, NC
| | | | - Myong-Hwa Yamamoto
- Cardiovascular Research Foundation, New York, NY
- Columbia University Medical Center/NewYork-Presbyterian Hospital, New York, NY
| | | | - Ajay J Kirtane
- Cardiovascular Research Foundation, New York, NY
- Columbia University Medical Center/NewYork-Presbyterian Hospital, New York, NY
| | - Gregg W Stone
- Cardiovascular Research Foundation, New York, NY
- Columbia University Medical Center/NewYork-Presbyterian Hospital, New York, NY
| | - Akiko Maehara
- Cardiovascular Research Foundation, New York, NY
- Columbia University Medical Center/NewYork-Presbyterian Hospital, New York, NY
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25
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Hur SH, Lee BR, Kim SW, Hong YJ, Bae JH, Choi D, Kang HJ, Choi SY, Lee SG, Kim DI, Park JS, Rha SW. Late-acquired incomplete stent apposition after everolimus-eluting stent versus sirolimus-eluting stent implantation in patients with non-ST-segment elevation myocardial infarction and ST-segment elevation myocardial infarction. EUROINTERVENTION 2016; 12:e979-e986. [PMID: 26403637 DOI: 10.4244/eijy15m09_12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS Our aim was to evaluate the incidence and clinical outcomes of late-acquired incomplete stent apposition (LAISA) after implantation of first- and second-generation drug-eluting stents in patients with acute myocardial infarction (AMI). METHODS AND RESULTS Late-Acquired incomplete stent aPPOsition after everolimus-eluting stent versus sirolimus-eluting Stent ImplanTatION in pAtients with non ST-segment elevation Myocardial Infarction and ST-segment elevation myocardial infarction (APPOSITION-AMI) was a prospective, randomised study comparing LAISA after everolimus-eluting stent (EES) and sirolimus-eluting stent (SES) implantation in AMI patients. Intravascular ultrasound examination was serially performed post-procedurally and at eight-month follow-up in 195 AMI patients (205 native coronary lesions: 100 EES; 105 SES). LAISA was observed in 6.0% and 16.2% of EES- vs. SES-treated lesions (p=0.021), respectively. In 64.7% of SES-treated lesions, LAISA was caused by positive remodelling, whereas thrombus dissolution or plaque reduction was observed in 66.7% of EES-treated lesions. Among patients with LAISA, MACE developed in one (4.5%) in the SES group with no ST in either group up to one year. CONCLUSIONS The incidence of LAISA was lower in AMI patients treated with EES as compared to SES, mainly secondary to positive remodelling in SES- but not EES-treated lesions. Patients with LAISA in both groups showed a very low MACE incidence at one-year follow-up.
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Affiliation(s)
- Seung-Ho Hur
- Department of Cardiology, Keimyung University Dongsan Medical Center, Daegu, South Korea
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26
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O'Brien CC, Lopes AC, Kolandaivelu K, Kunio M, Brown J, Kolachalama VB, Conway C, Bailey L, Markham P, Costa M, Ware J, Edelman ER. Vascular Response to Experimental Stent Malapposition and Under-Expansion. Ann Biomed Eng 2016; 44:2251-60. [PMID: 26732391 DOI: 10.1007/s10439-015-1518-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 11/17/2015] [Indexed: 10/22/2022]
Abstract
Up to 80% of all endovascular stents have malapposed struts, and while some impose catastrophic events others are inconsequential. Thirteen stents were implanted in coronary arteries of seven healthy Yorkshire pigs, using specially-designed cuffed balloons inducing controlled stent malapposition and under-expansion. Optical coherence tomography (OCT) imaging confirmed that 25% of struts were malapposed (strut-wall distance <strut thickness) to variable extent (max. strut-wall distance malapposed group 0.51 ± 0.05 mm vs. apposed group 0.09 ± 0.05 mm, p = 2e-3). Imaging at follow-up revealed malapposition acutely resolved (<1% of struts remained malapposed at day 5), with strong correlation between lumen and the stent cross-sectional areas (slope = 0.86, p < 0.0001, R (2) = 0.94). OCT in three of the most significantly malapposed vessels at baseline showed high correlation of elastic lamina area and lumen area (R (2) = 0.96) suggesting all lumen loss was related to contraction of elastic lamina with negligible plaque/intimal hyperplasia growth. Simulation showed this vascular recoil could be partially explained by the non-uniform strain environment created from sub-optimal expansion of device and balloon, and the inability of stent support in the malapposed region to resist recoil. Malapposition as a result of stent under-expansion is resolved acutely in healthy normal arteries, suggesting existing animal models are limited in replicating clinically observed persistent stent malapposition.
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Affiliation(s)
- Caroline C O'Brien
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA.
| | - Augusto C Lopes
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA
| | - Kumaran Kolandaivelu
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA.,Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Mie Kunio
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA
| | - Jonathan Brown
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA
| | - Vijaya B Kolachalama
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA.,Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Charles Stark Draper Laboratory, 555 Technology Square, Cambridge, MA, USA
| | - Claire Conway
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA
| | | | | | | | - James Ware
- Harvard School of Public Health, Boston, MA, USA
| | - Elazer R Edelman
- Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E25-449, Cambridge, MA, 02139, USA.,Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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Nakatsuma K, Shiomi H, Morimoto T, Ando K, Kadota K, Watanabe H, Taniguchi T, Yamamoto T, Furukawa Y, Nakagawa Y, Horie M, Kimura T. Intravascular Ultrasound Guidance vs. Angiographic Guidance in Primary Percutaneous Coronary Intervention for ST-Segment Elevation Myocardial Infarction – Long-Term Clinical Outcomes From the CREDO-Kyoto AMI Registry –. Circ J 2016; 80:477-84. [DOI: 10.1253/circj.cj-15-0870] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kenji Nakatsuma
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
| | - Hiroki Shiomi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
| | | | - Kenji Ando
- Division of Cardiology, Kokura Memorial Hospital
| | | | - Hiroki Watanabe
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
| | - Tomohiko Taniguchi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
| | - Takashi Yamamoto
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science
| | - Yutaka Furukawa
- Division of Cardiology, Kobe City Medical Center General Hospital
| | | | - Minoru Horie
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
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28
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Hong YJ, Ahn Y, Jeong MH. Role of Intravascular Ultrasound in Patients with Acute Myocardial Infarction. Korean Circ J 2015; 45:259-65. [PMID: 26240578 PMCID: PMC4521102 DOI: 10.4070/kcj.2015.45.4.259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 04/09/2015] [Accepted: 04/14/2015] [Indexed: 11/11/2022] Open
Abstract
Rupture of a vulnerable plaque and subsequent thrombus formation are important mechanisms leading to the development of an acute myocardial infarction (AMI). Typical intravascular ultrasound (IVUS) features of AMI include plaque rupture, thrombus, positive remodeling, attenuated plaque, spotty calcification, and thin-cap fibroatheroma. No-reflow phenomenon was attributable to the embolization of thrombus and plaque debris that results from mechanical fragmentation of the vulnerable plaque by percutaneous coronary intervention (PCI). Several grayscale IVUS features including plaque rupture, thrombus, positive remodeling, greater plaque burden, decreased post-PCI plaque volume, and tissue prolapse, and virtual histology-IVUS features such as large necrotic corecontaining lesion and thin-cap fibroatheroma were the independent predictors of no-reflow phenomenon in AMI patients. Non-culprit lesions associated with recurrent events were more likely than those not associated with recurrent events to be characterized by a plaque burden of ≥70%, a minimal luminal area of ≤4.0 mm(2), or to be classified as thin-cap fibroatheromas.
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Affiliation(s)
- Young Joon Hong
- Division of Cardiology of Chonnam National University Hospital, Heart Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
| | - Youngkeun Ahn
- Division of Cardiology of Chonnam National University Hospital, Heart Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
| | - Myung Ho Jeong
- Division of Cardiology of Chonnam National University Hospital, Heart Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
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29
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Pedersen SH, Pfisterer M, Kaiser C, Jensen JS, Alber H, Rickenbacher P, Sørensen R, Iversen A, Jensen MT, Wadt K, Galatius S. Drug-eluting stents and bare metal stents in patients with NSTE-ACS: 2-year outcome from the randomised BASKET-PROVE trial. EUROINTERVENTION 2015; 10:58-64. [PMID: 24694667 DOI: 10.4244/eijv10i1a11] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS The use of drug-eluting stents (DES) in patients with non-ST-segment elevation acute coronary syndrome (NSTE-ACS) is controversial and not yet endorsed in clinical guidelines. METHODS AND RESULTS This was an a priori planned post hoc analysis involving 754 NSTE-ACS patients from the randomised BASKET-PROVE trial (sirolimus-eluting stent vs. everolimus-eluting stent vs. bare metal stent in large-vessel stenting). The primary endpoint was the combined two-year rate of cardiovascular death or non-fatal myocardial infarction (MI). Secondary endpoints were each component of the primary endpoint, and clinically indicated target vessel revascularisation (TVR) and stent thrombosis. Compared to patients with BMS, those treated with SES and EES had a strong trend towards lower two-year rates of the primary endpoint (HR: 0.31 [CI: 0.11-0.90], p=0.03, and HR: 0.74 [CI: 0.44-1.24], p=0.25), and of TVR (HR: 0.58 [CI: 0.29-1.15], p=0.12) and (HR: 0.52 [CI: 0.34-0.78], p=0.002). When the SES and EES groups were combined and compared to BMS, significant reductions in both cardiovascular death/MI and TVR were found. CONCLUSIONS Compared with BMS, use of DES in NSTE-ACS patients undergoing stent implantation in large vessels was associated with a reduction in both TVR and the combined endpoint consisting of cardiovascular death/MI. Thus, DES use improves both efficacy and safety. These findings support the use of DES in NSTE-ACS patients.
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Affiliation(s)
- Sune Haahr Pedersen
- Department of Cardiology, Copenhagen University Hospital, Copenhagen, Denmark
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Yamawaki M, Onuma Y, Nakano M, Muramatsu T, Nakatani S, Ishibashi Y, Ishimori H, Hirano K, Ito Y, Tsukahara R, Muramatsu T. Simultaneous occlusion of left anterior descending and left circumflex arteries by very late stent thrombosis: vascular response to drug-eluting stents assessed by intravascular ultrasound. Heart Vessels 2014; 30:824-9. [PMID: 25031154 DOI: 10.1007/s00380-014-0545-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 06/27/2014] [Indexed: 11/25/2022]
Abstract
Very late stent thrombosis (VLST) is a catastrophic complication after implantation of a drug-eluting stent (DES). It has been reported that VLST is associated with pathological changes, which often include late acquired incomplete stent apposition (LAISA) with thrombus formation. In addition, the vascular response to the stent (evaginations, neointimal growth, and thrombosis) and the incidence of LAISA are reported to vary among the different types of DES. We experienced a patient with cardiogenic shock induced by simultaneous VLST of both the left anterior descending artery (LAD) and the left circumflex artery (LCX) at 3 years after implantation of two sirolimus-eluting stents. Intravascular ultrasound (IVUS) showed LAISA of both arteries. A paclitaxel-eluting stent, which had been implanted in the right coronary artery 3 years earlier, did not show such a finding. IVUS revealed "different vascular reactions" to "different types of DES" in this patient.
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Affiliation(s)
- Masahiro Yamawaki
- Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama, Japan.
| | - Yoshinobu Onuma
- Department of Interventional Cardiology, Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands
| | - Masatsugu Nakano
- Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama, Japan
| | - Takashi Muramatsu
- Department of Interventional Cardiology, Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands
| | - Shimpei Nakatani
- Department of Interventional Cardiology, Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands
| | - Yuki Ishibashi
- Department of Interventional Cardiology, Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands
| | - Hiroshi Ishimori
- Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama, Japan
| | - Keisuke Hirano
- Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama, Japan
| | - Yoshiaki Ito
- Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama, Japan
| | - Reiko Tsukahara
- Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama, Japan
| | - Toshiya Muramatsu
- Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, 3-6-1 Shimosueyoshi, Tsurumi-ku, Yokohama, Japan
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Tasal A, Bacaksiz A, Vatankulu MA, Turfan M, Erdogan E, Sonmez O, Kul S, Ertas G, Sevgili E, Goktekin O. Is postdilatation with a noncompliant balloon necessary after coronary stent deployment during primary angioplasty? J Interv Cardiol 2014; 26:325-31. [PMID: 23941650 DOI: 10.1111/joic.12041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Postdilatation (PD) with noncompliant balloon during elective percutaneous coronary intervention (PCI) is performed usually in clinical practice in order to optimize stent expansion. However, current knowledge about its use in patients undergoing primary PCI is controversial. This study aims to evaluate the angiographical and clinical results of PD in patients who underwent primary PCI with drug eluting stents (DESs). METHODS A total of 405 consecutive patients (mean age 56.9 ± 12.3 years; 302 male) with ST elevation myocardial infarction were evaluated retrospectively. Patients received DES with or without predilatation according to physician's discretion. Eligible patients were divided into 2 groups based on PD procedure. The clinical end-points were death, target vessel revascularization (TVR) and stent thrombosis at 6 months after PCI. The angiographic end-points were postprocedural correct Thrombolysis in Myocardial Infarction (TIMI) frame count (cTFC), final TIMI flow, and myocardial blush grade (MBG). RESULTS PD was performed in 214 patients (52.8%). Angiographical parameters such as TIMI flow, cTFC, and MBG did not differ after PD (P>0.05). During 6-month follow-up, TVR and stent thrombosis rates were lower in the PD group (6 vs. 16, P=0.03; and 3 vs. 10, P=0.04, respectively). PD and diabetes were detected as independent predictors of MACE (β=0.52, P=0.01, and β=-0.47, P=0.02; respectively). CONCLUSION Our study revealed that PD does not yield adverse effects on final angiographic parameters when performed during primary PCI. Besides PD seems to decrease probability of stent thrombosis and TVR.
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Affiliation(s)
- Abdurrahman Tasal
- Department of Cardiology, Bezmialem Foundation University, Istanbul, Turkey.
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Ragkousis GE, Curzen N, Bressloff NW. Simulation of longitudinal stent deformation in a patient-specific coronary artery. Med Eng Phys 2014; 36:467-76. [DOI: 10.1016/j.medengphy.2014.02.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 01/14/2014] [Accepted: 02/07/2014] [Indexed: 01/27/2023]
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Attizzani GF, Capodanno D, Ohno Y, Tamburino C. Mechanisms, pathophysiology, and clinical aspects of incomplete stent apposition. J Am Coll Cardiol 2014; 63:1355-67. [PMID: 24530675 DOI: 10.1016/j.jacc.2014.01.019] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 12/12/2013] [Accepted: 01/07/2014] [Indexed: 11/25/2022]
Abstract
Incomplete stent apposition (ISA) is characterized by the lack of contact of at least 1 stent strut with the vessel wall in a segment not overlying a side branch; it is more commonly found in drug-eluting stents than bare-metal stents. The accurate diagnosis of ISA, initially only possible with intravascular ultrasound, can currently be performed with higher accuracy by optical coherence tomography, which also enables strut-level assessment due to its higher axial resolution. Different circumstances related both to the index procedure and to vascular healing might influence ISA occurrence. Although several histopathology and clinical studies linked ISA to stent thrombosis, potential selection bias precluded definitive conclusions. Initial studies usually performed single time point assessments comparing overall ISA percentage and magnitude in different groups (i.e., stent type), thus hampering a comprehensive understanding of its relationship with vascular healing. Serial intravascular imaging studies that evaluated vascular response heterogeneity recently helped fill this gap. Some particular clinical scenarios such as acute coronary syndromes, bifurcations, tapered vessels, overlapping stents, and chronic total occlusions might predispose to ISA. Interventional cardiologists should be committed to optimal stent choices and techniques of implantation and use intravascular imaging guidance when appropriate to aim at minimizing acute ISA. In addition, the active search for new stent platforms that could accommodate vessel remodeling over time (i.e., self-expandable stents) and for new polymers and/or eluting drugs that could induce less inflammation (hence, less positive remodeling) could ultimately reduce the occurrence of ISA and its potentially harmful consequences.
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Affiliation(s)
- Guilherme F Attizzani
- Division of Cardiology, Ferrarotto Hospital, University of Catania, Catania, Italy; Division of Interventional Cardiology, Pitangueiras Hospital, Jundiaí, SP, Brazil; Harrington Heart and Vascular Institute, University Hospitals, Case Medical Center, Cleveland, Ohio
| | - Davide Capodanno
- Division of Cardiology, Ferrarotto Hospital, University of Catania, Catania, Italy; Excellence Through Newest Advances (ETNA) Foundation, Catania, Italy.
| | - Yohei Ohno
- Division of Cardiology, Ferrarotto Hospital, University of Catania, Catania, Italy
| | - Corrado Tamburino
- Division of Cardiology, Ferrarotto Hospital, University of Catania, Catania, Italy; Excellence Through Newest Advances (ETNA) Foundation, Catania, Italy
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Im E, Kim BK, Ko YG, Shin DH, Kim JS, Choi D, Jang Y, Hong MK. Incidences, Predictors, and Clinical Outcomes of Acute and Late Stent Malapposition Detected by Optical Coherence Tomography After Drug-Eluting Stent Implantation. Circ Cardiovasc Interv 2014; 7:88-96. [DOI: 10.1161/circinterventions.113.000797] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
We investigated the incidences, predictors, and clinical outcomes of acute and late stent malapposition detected by optical coherence tomography (OCT) after drug-eluting stent implantation.
Methods and Results—
We analyzed the OCT images from 351 patients with 356 lesions who received poststent and follow-up OCT examinations. Acute stent malapposition was observed in 62% of lesions. Approximately half of the acute stent malappositions were located within the edges of the stents. Severe diameter stenosis, calcified lesions, and long stents were independent predictors of acute stent malapposition. Follow-up OCT examinations were performed 175±60 days after drug-eluting stent implantation. Thirty-one percent of lesions with acute stent malapposition remained malapposed (late-persistent stent malapposition) and were typically (72%) located within the edges of the stent. The location within the stent edges and the volume of acute stent malapposition were independent predictors of late-persistent stent malapposition. Acute stent malapposition with a volume >2.56 mm
3
differentiated late-persistent stent malapposition from resolved acute stent malapposition. Late-acquired stent malapposition was detected in 15% of all lesions and was usually (61%) located within the stent body. Late-acquired stent malapposition was more frequently associated with plaque/thrombus prolapse on poststent OCT images (70% versus 42%;
P
<0.001). Clinical events, including cardiovascular death, nonfatal myocardial infarction, and stent thrombosis, did not occur in patients with late stent malapposition during the follow-up period of 28.6±10.3 months after drug-eluting stent implantation.
Conclusions—
Acute, late-persistent, and late-acquired stent malapposition had relatively high incidences but different predictors. The clinical outcome of stent malapposition was favorable.
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Affiliation(s)
- Eui Im
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
| | - Byeong-Keuk Kim
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
| | - Young-Guk Ko
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
| | - Dong-Ho Shin
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
| | - Jung-Sun Kim
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
| | - Donghoon Choi
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
| | - Yangsoo Jang
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
| | - Myeong-Ki Hong
- From the Division of Cardiology, Severance Cardiovascular Hospital (E.I., B.-K.K., Y.-G.K., D.-H.S., J.-S.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea
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Mizoguchi T, Sawada T, Shinke T, Yamada S, Okamoto H, Kim SS, Takarada A, Yasaka Y. Detailed comparison of intra-stent conditions 12months after implantation of everolimus-eluting stents in patients with ST-segment elevation myocardial infarction or stable angina pectoris. Int J Cardiol 2014; 171:224-30. [DOI: 10.1016/j.ijcard.2013.12.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Revised: 10/31/2013] [Accepted: 12/12/2013] [Indexed: 01/15/2023]
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Garg S, Serruys P. Benefits of and safety concerns associated with drug-eluting coronary stents. Expert Rev Cardiovasc Ther 2014; 8:449-70. [DOI: 10.1586/erc.09.138] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ormiston JA, Webber B, Ubod B, White J, Webster MWI. Stent longitudinal strength assessed using point compression: insights from a second-generation, clinically related bench test. Circ Cardiovasc Interv 2013; 7:62-9. [PMID: 24368821 DOI: 10.1161/circinterventions.113.000621] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Stent longitudinal distortion, while infrequent, can lead to adverse clinical events. Our first bench comparison of susceptibility of different stent designs to distortion applied force to the entire circumference of the proximal stent hoop. The test increased understanding of stent design and led to recommendations for design change in some. Our second-generation test more closely mimics clinical scenarios by applying force to a point on the proximal hoop of a malapposed stent. METHODS AND RESULTS Each 3-mm-diameter stent was secured in a test apparatus so that its proximal 5 mm was malapposed in a 3.5-mm tube. An instron applied force to the proximal hoop of each of 5 examples of each of 6 stent designs using a narrow rod so that force applied and distance compressed could be measured. Hoops on the side of the force were pushed together, became malapposed, and obstructed the lumen. In addition, the proximal stent hoop tilted causing malapposition, the contralateral side of the stent from the applied force causing lumen obstruction. CONCLUSIONS This second-generation, more clinically relevant test showed the Biomatrix Flex was the most resistant to deformation and the Element the most easily deformed. The addition of more connectors between the proximal hoops in the Promus Premier design has reduced the potential for distortion when compared with the Element, so that distortion was similar to the Vision, Multi-Link 8, and Integrity designs. The test also provided insight into the way in which stents are likely to distort in clinical practice.
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Affiliation(s)
- John A Ormiston
- From the Mercy Angiography, Auckland, New Zealand (J.A.O., B.W., B.U., M.W.I.W.); and Cardiology Department, Auckland City Hospital, Auckland, New Zealand (J.A.O., J.W., M.W.I.W.)
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Relation between poststenting peristent plaque components and late stent malapposition after drug-eluting stent implantation: Virtual histology-intravascular ultrasound analysis. Int J Cardiol 2013; 167:1882-7. [DOI: 10.1016/j.ijcard.2012.04.152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 04/02/2012] [Accepted: 04/28/2012] [Indexed: 11/22/2022]
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Kosonen P, Vikman S, Jensen LO, Lassen JF, Harnek J, Olivecrona GK, Erglis A, Fossum E, Niemelä M, Kervinen K, Ylitalo A, Pietilä M, Aaroe J, Kellerth T, Saunamäki K, Thayssen P, Hellsten L, Thuesen L, Niemelä K. Intravascular ultrasound assessed incomplete stent apposition and stent fracture in stent thrombosis after bare metal versus drug-eluting stent treatment the Nordic Intravascular Ultrasound Study (NIVUS). Int J Cardiol 2013; 168:1010-6. [DOI: 10.1016/j.ijcard.2012.10.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 10/02/2012] [Accepted: 10/28/2012] [Indexed: 12/13/2022]
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Calé R, Teles RC, Almeida M, do Rosário I, Sousa PJ, Brito J, Raposo L, Gonçalves PDA, Gabriel HM, Mendes M. Percutaneous coronary intervention using a full metal jacket with drug-eluting stents: major adverse cardiac events at one year. Arq Bras Cardiol 2013; 101:117-26. [PMID: 23821408 PMCID: PMC3998154 DOI: 10.5935/abc.20130139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Accepted: 12/14/2013] [Indexed: 11/20/2022] Open
Abstract
Background The clinical benefit of percutaneous coronary intervention (PCI) for long coronary
lesions is unclear; furthermore, concerns have been raised about its safety. Objectives To evaluate the predictors of major adverse cardiac events (MACE) associated with
PCI using a full metal jacket (FMJ), defined as overlapping drug-eluting stents
(DES) measuring > 60 mm in length, for very long lesions. Methods We enrolled 136 consecutive patients with long coronary lesions requiring FMJ in
our single-center registry. The primary endpoint included the combined occurrence
of all-cause death, myocardial infarction (MI), and target vessel
revascularization (TVR). Demographic, clinical, angiographic, and procedural
variables were evaluated using stepwise Cox regression analysis to determine
independent predictors of outcome. Results The mean length of stent per lesion was 73.2 ± 12.3 mm and the mean reference
vessel diameter was 2.9 ± 0.6 mm. Angiographic success was 96.3%. Freedom from
MACE was 94.9% at 30 days and 85.3% at one year. At the one-year follow-up, the
all-cause mortality rate was 3.7% (1.5% cardiac deaths), the MI rate was 3.7%, and
the incidence of definite or probable stent thrombosis (ST) was 2.9%. Female
gender [hazard ratio (HR), 4.40; 95% confidence interval (CI), 1.81-10.66; p =
0.001) and non-right coronary artery PCI (HR, 3.49; 95%CI, 1.42-8.59; p = 0,006)
were independent predictors of MACE at one year. Freedom from adverse events at
one year was higher in patients with stable angina who underwent PCI (HR, 0.33;
95%CI, 0.13-0.80; p = 0.014). Conclusions PCI using FMJ with DES for very long lesions was efficacious but associated with a
high rate of ST at the one-year follow-up. However, the rate of cardiac mortality,
nonprocedure-related MI, and MACE was relatively low. Target coronary vessel PCI,
clinical presentation, and female gender are new contemporary clinical factors
that appear to have adverse effects on the outcome of PCI using FMJ for long
lesions.
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Affiliation(s)
- Rita Calé
- Mailing Address: Rita Calé, Rua João Chagas Urbanização Alto dos
Moinhos, nº4, nucleo Z 6ºEsq. Postal Code 1500-493, Lisboa, Portugal, E-mail:
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Fröbert O, Sarno G, James SK, Saleh N, Lagerqvist B. Effect of stent inflation pressure and post-dilatation on the outcome of coronary artery intervention. A report of more than 90,000 stent implantations. PLoS One 2013; 8:e56348. [PMID: 23418560 PMCID: PMC3571959 DOI: 10.1371/journal.pone.0056348] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 01/08/2013] [Indexed: 11/23/2022] Open
Abstract
Background Percutaneous coronary intervention (PCI) stent inflation pressure correlates to angiographic lumen improvement and stent expansion but the relation to outcome is not clarified. Using comprehensive registry data our aim was to evaluate how stent inflation pressure influences restenosis, stent thrombosis and death following PCI. Methods We evaluated all consecutive coronary stent implantations in Sweden during 46 months from 2008 using data from the Swedish Coronary Angiography and Angioplasty Registry (SCAAR). We used logistic regression and Cox proportional hazard modeling to estimate risk of outcomes with different balloon pressures. Results In total, 93 697 stents were eligible for analysis and divided into five different pressure interval groups: ≤15 atm, 16–17 atm, 18–19 atm, 20–21 atm and ≥22 atm. The risks of stent thrombosis and restenosis were significantly higher in the ≤15 atm, 18–19 atm and ≥22 atm groups (but not in the 16–17 atm group) compared to the 20–21 atm group. There were no differences in mortality. Post-dilatation was associated with a higher restenosis risk ratio (RR) of 1.22 (95% confidence interval (CI) 1.14–1.32, P<0.001) but stent thrombosis did not differ statistically between procedures with or without post-dilatation. The risk of death was lower following post-dilatation (RR 0.81 (CI 0.71–0.93) P = 0.003) and the difference compared to no post-dilatation was seen immediately after PCI. Conclusion Our retrospective study of stent inflation pressure identified a possible biological pattern—the risks of stent thrombosis and of restenosis appeared to be higher with low and very high pressures. Post-dilatation might increase restenosis risk.
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Affiliation(s)
- Ole Fröbert
- Department of Cardiology, Örebro University Hospital, Örebro, Sweden.
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Comparisons of detailed arterial healing response at seven months following implantation of an everolimus- or sirolimus-eluting stent in patients with ST-segment elevation myocardial infarction. Int J Cardiol 2012; 168:960-6. [PMID: 23164597 DOI: 10.1016/j.ijcard.2012.10.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 10/23/2012] [Accepted: 10/28/2012] [Indexed: 11/20/2022]
Abstract
BACKGROUND The difference of arterial healing response following everolimus-eluting stent (EES) or sirolimus-eluting stent (SES) implantation in patients with ST-segment elevated myocardial infarction (STEMI) has not been compared in detail. METHODS Thirty-five patients with STEMI were randomly implanted with an EES or SES (23 EES, 12 SES). At seven months, neointimal thickness (NIT) and strut malapposition were evaluated by optical coherence tomography (OCT) and the grade and heterogeneity of neointimal coverage (NIC) and development of intra-stent thrombi were evaluated by angioscopy. RESULTS No significant differences were noted in clinical events experienced by the two groups, although one patient with an EES died following a papillary muscle rupture and one patient with a SES experienced sub-acute stent thrombosis. On OCT, although the EES implants showed a greater NIT than the SES implants (94.8 ± 88.8 μm vs 65.6 ± 63.3 μm, P<0.0001), both the EES and SES showed an excellent suppression of neointimal proliferation in the culprit lesion of STEMI. The frequency of uncovered and malapposed struts of EES was significantly lower than that of SES (2.7% vs. 15.7%, P<0.0001, 0.7% vs. 2.3%, P<0.0001, respectively). The ratio of stents fully covered with neointima of EES group was significantly higher than that of SES group (P=0.04). Angioscopic analysis also showed greater dominant NIC grade with homogenous NIC in EES than in SES (P=0.03, P=0.0002, respectively). The incidence of massive intra-stent thrombus of EES was lower than that of SES (P=0.05). CONCLUSION For patients with STEMI, EES may promote better arterial healing response than SES.
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Foin N, Davies JE, Di Mario C. Letter by Foin et Al regarding article, "edge effect from drug-eluting stents as assessed with serial intravascular ultrasound: a systematic review". Circ Cardiovasc Interv 2012; 5:e70; author reply e71. [PMID: 23074350 DOI: 10.1161/circinterventions.112.972927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Guo N, Mintz GS. Drug-eluting stent malapposition and its relationship to drug-eluting stent thrombosis. Interv Cardiol 2012. [DOI: 10.2217/ica.12.53] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Räber L, Kelbaek H, Ostoijc M, Baumbach A, Tüller D, von Birgelen C, Roffi M, Pedrazzini G, Kornowski R, Weber K, Heg D, Matter C, Lüscher T, Taniwaki M, Meier B, Jüni P, Windecker S. Comparison of biolimus eluted from an erodible stent coating with bare metal stents in acute ST-elevation myocardial infarction (COMFORTABLE AMI trial): rationale and design. EUROINTERVENTION 2012; 7:1435-43. [PMID: 22301368 DOI: 10.4244/eijv7i12a224] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS Compared with bare metal stents (BMS), early generation drug-eluting stents (DES) reduce the risk of revascularisation in patients with ST-elevation myocardial infarction (STEMI) at the expense of an increased risk of very late stent thrombosis (ST). Durable polymer coatings for controlled drug release have been identified as a potential trigger for these late adverse events and this has led to the development of newer generation DES with durable and biodegradable polymer surface coatings with improved biocompatibility. In a recent all-comers trial, biolimus-eluting stents with a biodegradable polymer surface coating were found to reduce the risk of very late ST by 80% compared with sirolimus-eluting stents with durable polymer, which also translated into a lower risk of cardiac death and myocardial infarction (MI) beyond one year. METHODS AND RESULTS The multicentre COMFORTABLE AMI trial (NCT00962416) randomly assigned 1,161 patients to treatment with biolimus-eluting stents with biodegrable polymer and bare metal stents of otherwise identical design at 11 international sites. The primary endpoint is a composite of cardiac death, target-vessel MI and target lesion revascularisation at one year. Assuming a relative risk reduction of 40% in event rates of the primary endpoint in favour of biolimus-eluting stents with biodegradable polymer, 1,064 patients will provide 80% power to demonstrate superiority. Clinical follow-up will be continued through five years. CONCLUSIONS The COMFORTABLE AMI trial will determine whether biolimus-eluting stents with biodegradable polymer are superior to bare metal stents of otherwise identical design. This is the first randomised controlled trial (RCT) investigating DES with a biodegradable polymer surface coating for drug release in the treatment of patients with STEMI.
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Affiliation(s)
- Lorenz Räber
- Swiss Cardiovascular Center, Bern University Hospital, Bern, Switzerland
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Jacobson J, Maehara A, Mintz GS. Clinical applications of intravascular ultrasound in the implantation of drug-eluting stents. Expert Rev Cardiovasc Ther 2012; 10:543-7. [PMID: 22651828 DOI: 10.1586/erc.12.40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Shen L, Wu Y, Zhang F, Wu L, Dong C, Gao Y, Sun A, Zou Y, Qian J, Sun J, Zhong W, Ge J. Assessment of an asymmetrical coating stent with sirolimus released from ablumial matrix in porcine model. Clin Res Cardiol 2012; 101:917-27. [PMID: 22627890 DOI: 10.1007/s00392-012-0476-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 05/10/2012] [Indexed: 11/25/2022]
Abstract
BACKGROUND Delayed endothelialization contributes to stent thrombosis of current drug-eluting stents. The asymmetrical coating technique provides an anti-proliferative effect abluminally without affecting luminal endothelialization. Layer-by-layer self-assembled chitosan/heparin (C/H LBL) has been proved to promote re-endothelialization. A novel stent system, C/H LBL coated luminally and sirolimus released abluminally (C/H LBL-SES), was fabricated. METHODS Bare metal stents (BMS), traditionally circumferential sirolimus-eluting stents (SES), and C/H LBL-SES were implanted into porcine coronary arteries. At the 7, 14 and 28 days follow-up (FU), angiography, intravascular ultrasound (IVUS), vasomotor function induced by acetylcholine (Ach), scanning-electron microscopy and histopathology were performed. Remodeling index (RI) was based on IVUS and defined as cross-sectional area (CSA) of vessel at in-stent segment divided by CSA of reference vessel and expressed as a percentage with a normal range from 0.95 to 1.05. RESULTS Thirty-eight mini pigs were enrolled and 74 stents (BMS = 23, C/H LBL = 28, SES = 23) were implanted in this study. At 28 days after implantation, the diameter stenosis of C/H LBL-SES by quantitative coronary angiography was 18.8 ± 2.5 %, the area stenosis by histomorphometry was 24.2 ± 2.9 %, which were comparable to that of SES and superior to BMS. At 14 days, re-endothelialization of C/H LBL-SES was almost completed, while only about 50 % of surface of SES was covered by endothelium. At 7, 14 and 28 days FU, although C/H LBL-SES suffered a greater vasoconstriction induced by Ach infusion than BMS (P < 0.05), it behaved better than SES (P < 0.01). No sign of stent malapposition was detected, while RI was within the normal range by IVUS. No acute or subacute thrombotic events occurred in all three groups. CONCLUSIONS The asymmetrically designed C/H LBL-SES successfully inhibited neointima hyperplasia, while diminishing vasoconstriction after Ach-stress. Endothelialization of C/H LBL-SES was less affected compared with traditionally circumferentially coated SES.
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Affiliation(s)
- Li Shen
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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Wang A, Eggermont J, Dekker N, Garcia-Garcia HM, Pawar R, Reiber JHC, Dijkstra J. Automatic stent strut detection in intravascular optical coherence tomographic pullback runs. Int J Cardiovasc Imaging 2012; 29:29-38. [PMID: 22618433 PMCID: PMC3550706 DOI: 10.1007/s10554-012-0064-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 05/02/2012] [Indexed: 11/29/2022]
Abstract
We developed and evaluated an automatic stent strut detection method in intravascular optical coherence tomography (IVOCT) pullback runs. Providing very high resolution images, IVOCT has been rapidly accepted as a coronary imaging modality for the optimization of the stenting procedure and its follow-up evaluation based on stent strut analysis. However, given the large number of struts visible in a pullback run, quantitative three-dimensional analysis is only feasible when the strut detection is performed automatically. The presented method first detects the candidate pixels using both a global intensity histogram and the intensity profile of each A-line. Gaussian smoothing is applied followed by specified Prewitt compass filters to detect the trailing shadow of each strut. Next, the candidate pixels are clustered using the shadow information. In the final step, several filters are applied to remove the false positives such as the guide wire. Our new method requires neither a priori knowledge of the strut status nor the lumen/vessel contours. In total, 10 IVOCT pullback runs from a 1-year follow-up study were used for validation purposes. 18,311 struts were divided into three strut status categories (malapposition, apposition or covered) and classified based on the image quality (high, medium or low). The inter-observer agreement is 95%. The sensitivity was defined as the ratio of the number of true positives and the total number of struts in the expert defined result. The proposed approach demonstrated an average sensitivity of 94%. For malapposed, apposed and covered stent struts, the sensitivity of the method is respectively 91, 93 and 94%, which shows the robustness towards different situations. The presented method can detect struts automatically regardless of the strut status or the image quality, and thus can be used for quantitative measurement, 3D reconstruction and visualization of the stents in IVOCT pullback runs.
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Affiliation(s)
- Ancong Wang
- LKEB-Division of Image Processing, Department of Radiology, Leiden University Medical Center, P. O. Box 9600, Leiden, The Netherlands
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Adjunctive balloon dilatation after stent deployment: Beneficial or deleterious? Int J Cardiol 2012; 157:3-7. [DOI: 10.1016/j.ijcard.2011.06.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 05/25/2011] [Accepted: 06/04/2011] [Indexed: 11/23/2022]
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Papayannis AC, Cipher D, Banerjee S, Brilakis ES. Optical coherence tomography evaluation of drug-eluting stents: a systematic review. Catheter Cardiovasc Interv 2012; 81:481-7. [PMID: 22488730 DOI: 10.1002/ccd.24327] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Accepted: 01/03/2012] [Indexed: 11/08/2022]
Abstract
AIMS We performed a systematic review of studies reporting stent strut coverage and malapposition post implantation of different drug-eluting stent (DES), as assessed by optical coherence tomography (OCT). METHODS A review of publications and online databases in May 2011 retrieved 33 published studies reporting stent strut coverage and malapposition post-DES implantation using OCT: 24 for sirolimus-eluting stents (SES), 13 for paclitaxel-eluting stents (PES), 10 for zotarolimus-eluting stents (ZES), and two for everolimus-eluting stents (EES). The follow-up duration ranged from 3 months to 4 years. Stent strut coverage and malapposition were compared between DES at various time intervals post implantation. RESULTS Significant differences in stent strut coverage and malapposition exist between various DES. The SES had the highest frequency of uncovered struts at 3, 6, 9, and 12 months (13.1%, 10.9%, 8.1%, and 7.5%, respectively), followed by PES (5.5%, 4.4%, and 5.7% at 6, 9, and 12 months, respectively) and ZES (0.7%, 0%, and 0.5% at 3, 6, and 9 months, respectively) (P < 0.001 for all comparisons between stents). Only two studies reported 3.1% uncovered struts at 9 months with the EES. Stent strut malapposition at 6, 9, and 12 months was highest with SES (3.2%, 2.2%, and 1.2%, respectively) followed by PES (1.6%, 1.3%, and 0.9%, respectively), EES (0.46% at 9 months), and ZES (0.7% and 0.1% at 6 and 9 months, respectively). CONCLUSIONS SES had the highest rates of uncovered struts and malapposition, followed by PES and ZES. Such differences may explain the different clinical outcomes between various DES. © 2012 Wiley Periodicals, Inc.
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