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Alexandrou M, Rempakos A, Al Ogaili A, Choi JW, Poommipanit P, Alaswad K, Basir MB, Davies R, Benton S, Jaffer FA, Chandwaney RH, Azzalini L, Kearney KE, ElGuindy AM, Abi Rafeh N, Goktekin O, Gorgulu S, Khatri JJ, Aygul N, Vo MN, Cincin A, Rangan BV, Mastrodemos OC, Allana SS, Sandoval Y, Burke MN, Brilakis ES. Balloon-assisted subintimal entry (BASE) in chronic total occlusion percutaneous coronary interventions. Catheter Cardiovasc Interv 2023; 102:834-843. [PMID: 37676010 DOI: 10.1002/ccd.30830] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/21/2023] [Accepted: 08/27/2023] [Indexed: 09/08/2023]
Abstract
BACKGROUND There is limited data on the use of the balloon-assisted subintimal entry (BASE) technique in chronic total occlusion (CTO) percutaneous coronary intervention (PCI). METHODS We analyzed the baseline clinical and angiographic characteristics and outcomes of 155 CTO PCIs that utilized the BASE technique at 31 US and non-US centers between 2016 and 2023. RESULTS The BASE technique was used in 155 (7.9%) of 1968 antegrade dissection and re-entry (ADR) cases performed during the study period. The mean age was 66 ± 10 years, 88.9% of the patients were men, and the prevalence of diabetes (44.6%), hypertension (90.5%), and dyslipidemia (88.7%) was high. Compared with 1813 ADR cases that did not use BASE, the target vessel of the BASE cases was more commonly the RCA and less commonly the LAD. Lesions requiring BASE had longer occlusion length (42 ± 23 vs. 37 ± 23 mm, p = 0.011), higher Japanese CTO (J-CTO) (3.4 ± 1.0 vs. 3.0 ± 1.1, p < 0.001) and PROGRESS-CTO (Prospective Global Registry for the Study of Chronic Total Occlusion Intervention chronic total occlusion) (1.8 ± 1.0 vs. 1.5 ± 1.0, p = 0.008) scores, and were more likely to have proximal cap ambiguity, side branch at the proximal cap, blunt/no stump, moderate to severe calcification, and proximal tortuosity. Technical (71.6% vs. 75.5%, p = 0.334) and procedural success (71.6% vs. 72.8%, p = 0.821), as well as major adverse cardiac events (MACE) (1.3% vs. 4.1%, p = 0.124), were similar in ADR cases that used BASE and those that did not. CONCLUSIONS The BASE technique is used in CTOs with longer occlusion length, higher J-CTO score, and more complex angiographic characteristics, and is associated with moderate success but also low MACE.
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Affiliation(s)
- Michaella Alexandrou
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - Athanasios Rempakos
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - Ahmed Al Ogaili
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - James W Choi
- Texas Health Presbyterian Hospital, Dallas, Texas, USA
| | - Paul Poommipanit
- University Hospitals, Case Western Reserve University, Cleveland, Ohio, USA
| | | | - Mir B Basir
- Henry Ford Cardiovascular Division, Detroit, Michigan, USA
| | | | | | | | | | - Lorenzo Azzalini
- Division of Cardiology, Department of Medicine, University of Washington, Seattle, Washington, USA
| | - Kathleen E Kearney
- Division of Cardiology, Department of Medicine, University of Washington, Seattle, Washington, USA
| | | | | | | | | | | | | | - Minh N Vo
- Royal Columbian Hospital, Vancouver, British Columbia, Canada
| | - Altug Cincin
- Marmara University School of Medicine Pendik, Training and Research Hospital, Kaynarca, Turkey
| | - Bavana V Rangan
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - Olga C Mastrodemos
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - Salman S Allana
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - Yader Sandoval
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - M Nicholas Burke
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - Emmanouil S Brilakis
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
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Vo MN, Brilakis ES, Lombardi W. "Power knuckle" for facilitating the "move the cap" technique. Catheter Cardiovasc Interv 2023; 101:343-346. [PMID: 36617390 DOI: 10.1002/ccd.30542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 12/07/2022] [Accepted: 12/16/2022] [Indexed: 01/09/2023]
Abstract
Chronic total occlusions with proximal cap ambiguity remains the most challenging to recanalize and are associated with higher failure rate. We describe the "power knuckle" technique, in which the subintimal space proximal to the proximal cap is safely entered with a knuckle wire supported by a microcatheter and an inflated balloon. The "power knuckle" can facilitate entry into the extraplaque space for subsequent antegrade dissection and re-entry.
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Affiliation(s)
- Minh N Vo
- Royal Columbian Hospital, Vancouver, British Columbia, Canada
| | - Emmanouil S Brilakis
- Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Minneapolis, Minnesota, USA
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Graham JJ, Bagai A, Wijeysundera H, Weisz G, Rinfret S, Dick A, Jolly SS, Schaempert E, Mansour S, Dzavik V, Henriques JPS, Elbarouni B, Vo MN, Teefy P, Goodhart D, Mancini GBJ, Strauss BH, Buller CE. Collagenase to facilitate guidewire crossing in chronic total occlusion PCI-The Total Occlusion Study in Coronary Arteries-5 (TOSCA-5) trial. Catheter Cardiovasc Interv 2022; 99:1065-1073. [PMID: 35077606 DOI: 10.1002/ccd.30101] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/29/2021] [Accepted: 01/09/2022] [Indexed: 11/12/2022]
Abstract
BACKGROUND Chronic total occlusions (CTO) are common and are associated with lower percutaneous coronary intervention (PCI) success rates, often due to failure of antegrade guidewire crossing. Local, intralesional delivery of collagenase (MZ-004) may facilitate guidewire crossing in CTO. AIMS To evaluate the effect of MZ-004 in facilitating antegrade wire crossing in CTO angioplasty. METHODS A total of 76 patients undergoing CTO PCI were enrolled at 13 international sites: 38 in the randomized training stage (collagenase [MZ-004] 900 or 1200 μg) and 38 in the placebo-controlled stage (MZ-004 900 or 1200 μg or placebo). Patients received the MZ-004 or identical volume saline (placebo group) in a double-blind design, injected via microcatheter directly into the proximal cap of the CTO. The following day patients underwent CTO PCI using antegrade wire techniques only. RESULTS Patients were generally similar except for a trend for higher Japanese chronic total occlusion (J-CTO) score in the MZ-004 group (MZ-004 J-CTO score 1.9 vs. 1.4, p = 0.07). There was a numerical increase in the rates of guidewire crossing in the MZ-004 groups compared to placebo (74% vs. 63%, p = 0.52). Guidewire crossing with a soft-tip guidewire (≤1.5 g tip load) was significantly higher in the MZ-004 groups (0% in placebo, 17% in 900 μg, and 29% in 1200 μg MZ-004 group, p = 0.03). Rates of the major adverse cardiovascular event were similar between groups. CONCLUSION Local delivery of MZ-004 into coronary CTOs appears safe and may facilitate CTO crossing, particularly with softer tipped guidewires. These data support the development of a pivotal trial to further evaluate this agent.
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Affiliation(s)
- John J Graham
- Terrence Donnelly Heart Center, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Akshay Bagai
- Terrence Donnelly Heart Center, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Harindra Wijeysundera
- Schulich Heart Program, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario, Canada
| | - Giora Weisz
- Department of Cardiology, Shaare Zedek Medical Center, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Stéphane Rinfret
- Quebec Heart and Lung Institute, Laval University, Quebec City, Quebec, Canada
| | - Alexander Dick
- University of Ottawa Heart Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Sanjit S Jolly
- McMaster University and the Population Health Research Institute, Hamilton Health Sciences, Hamilton, Ontario, Canada
| | | | - Samer Mansour
- Division of Cardiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, Québec, Canada
| | - Vladimir Dzavik
- Peter Munk Cardiac Centre, University Health Network, Toronto, Ontario, Canada
| | - Jose P S Henriques
- Department of Cardiology, Heart Center, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Basem Elbarouni
- St. Boniface General Hospital Winnipeg, Winnipeg, Manitoba, Canada
| | - Minh N Vo
- St. Boniface General Hospital Winnipeg, Winnipeg, Manitoba, Canada
| | - Patrick Teefy
- Department of Medicine, Cardiology Division, London Health Sciences Centre, University Hospital, London, Ontario, Canada
| | - David Goodhart
- Libin Cardiovascular Institute of Alberta, Calgary, Alberta, Canada
| | - G B John Mancini
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Christopher E Buller
- Terrence Donnelly Heart Center, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
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Vo MN, Brilakis ES, Pershad A, Grantham JA. Modified subintimal transcatheter withdrawal: A novel technique for hematoma decompression to facilitate distal reentry during coronary chronic total occlusion recanalization. Catheter Cardiovasc Interv 2019; 96:E98-E101. [PMID: 31584234 DOI: 10.1002/ccd.28500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/22/2019] [Accepted: 08/30/2019] [Indexed: 11/06/2022]
Abstract
A controlled antegrade dissection and reentry technique is the most commonly employed crossing strategy for long coronary chronic total occlusions. The development of compressive hematoma is a recognized complication and results in the impairment of distal vessel visualization and hinders successful reentry attempts. We describe a novel technique utilizing a widely available microcatheter to decompress the subintimal hematoma to restore distal visualization and allow successful reentry.
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Affiliation(s)
- Minh N Vo
- Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | | | - Ashish Pershad
- Saint Luke's Mid America Heart Institute, University of Missouri Kansas City, Kansas City, Missouri
| | - J Aaron Grantham
- Banner University Medical Center Phoenix and University of Arizona College of Medicine-Phoenix, Phoenix, Arizona
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Shavadia JS, Vo MN, Bainey KR. Challenges With Severe Coronary Artery Calcification in Percutaneous Coronary Intervention: A Narrative Review of Therapeutic Options. Can J Cardiol 2018; 34:1564-1572. [PMID: 30527144 DOI: 10.1016/j.cjca.2018.07.482] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/25/2018] [Accepted: 07/25/2018] [Indexed: 12/18/2022] Open
Abstract
Coronary calcification often complicates atherosclerosis. With an aging population, coinciding with lower thresholds for coronary angiography and percutaneous coronary intervention (PCI), severe calcific coronary stenoses remain a challenge for interventional cardiologists. Although advances in coronary guidewires, percutaneous balloons, and adjunctive procedural devices have improved success of PCI, recalcitrant calcified lesions not amenable to the conventional technique frequently occur. Coronary atherectomy with plaque modification provides a therapeutic alternative. As such, various modalities such as rotational, orbital or laser atherectomy, and more recently shockwave lithoplasty have become therapeutic options for PCI. We provide a summary of the principles, technique, and contemporary evidence for these currently approved devices designed to treat severe coronary calcific lesions.
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Affiliation(s)
- Jay S Shavadia
- Division of Cardiology, University of Saskatchewan College of Medicine, Saskatoon, Saskatchewan, Canada
| | - Minh N Vo
- Division of Cardiology, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Kevin R Bainey
- Division of Cardiology, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada.
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McGrath BM, Vo MN. Novel use of cutting balloon to manage compressive subintimal hematoma during left main stenting in a patient with spontaneous coronary artery dissection. Clin Case Rep 2018; 6:1291-1295. [PMID: 29988628 PMCID: PMC6028357 DOI: 10.1002/ccr3.1531] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 02/13/2018] [Accepted: 03/24/2018] [Indexed: 11/28/2022] Open
Abstract
Spontaneous coronary artery dissection (SCAD) is a common cause of acute coronary syndrome particularly in younger women. Good outcomes with conservative management are generally expected. However, there is uncertainty of how to manage symptomatic or unstable patients. Percutaneous angioplasty may propagate the subintimal hematoma compromising coronary blood flow. Cutting balloon angioplasty can relieve the compressive effects of a propagated subintimal hematoma in SCAD.
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Affiliation(s)
- Brent M. McGrath
- Division of Cardiology (Interventional Cardiology)New Brunswick Heart CentreSaint John Regional HospitalSaint JohnNew BrunswickCanada
| | - Minh N. Vo
- Mazankowski Alberta Heart InstituteUniversity of Alberta HospitalEdmontonAlbertaCanada
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Vo MN, Brilakis ES, Grantham JA. Novel use of cutting balloon to treat subintimal hematomas during chronic total occlusion interventions. Catheter Cardiovasc Interv 2017; 91:53-56. [DOI: 10.1002/ccd.27184] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/26/2017] [Accepted: 06/08/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Minh N. Vo
- Mazankowski Alberta Heart Institute; Edmonton Alberta Canada
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Brilakis ES, Karmpaliotis D, Vo MN, Carlino M, Galassi AR, Boukhris M, Alaswad K, Bryniarski L, Lombardi WL, Banerjee S. Update on Coronary Chronic Total Occlusion Percutaneous Coronary Intervention. Interv Cardiol Clin 2016; 5:177-186. [PMID: 28582202 DOI: 10.1016/j.iccl.2015.12.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Chronic total occlusion (CTO) percutaneous coronary intervention (PCI) has significantly evolved during recent years. High success rates are being achieved by experienced centers and operators, but not at less-experienced centers. Use of CTO crossing algorithms can help improve the success and efficiency of these potentially lengthy procedures. There is a paucity of clinical trial data examining clinical outcomes of CTO PCI, which is critical for further adoption and refinement of the procedure. We provide a detailed overview of the clinical evidence and current available crossing strategies, with emphasis on recent developments and techniques.
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Affiliation(s)
- Emmanouil S Brilakis
- Department of Cardiovascular Diseases, VA North Texas Healthcare System, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA.
| | - Dimitri Karmpaliotis
- Department of Cardiovascular Diseases, NYP Columbia University, New York, NY, USA
| | - Minh N Vo
- St Boniface Hospital Cardiac Science Program, University of Manitoba, Winnipeg, Canada
| | - Mauro Carlino
- Department of Cardiovascular Diseases, San Raffaele Scientific Institute, Milan, Italy
| | - Alfredo R Galassi
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy; Department of Cardiovascular Diseases, University of Zurich, Zurich, Switzerland
| | - Marouane Boukhris
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy; Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Khaldoon Alaswad
- Department of Cardiovascular Diseases, Henry Ford Hospital, Detroit, MI, USA
| | - Leszek Bryniarski
- Department of Cardiology and Hypertension, Jagiellonian University Medical College, Krakow, Poland
| | | | - Subhash Banerjee
- Department of Cardiovascular Diseases, VA North Texas Healthcare System, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
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Vo MN, Christopoulos G, Karmpaliotis D, Lombardi WL, Grantham JA, Brilakis ES. Balloon-Assisted Microdissection "BAM" Technique for Balloon-Uncrossable Chronic Total Occlusions. J Invasive Cardiol 2016; 28:E37-E41. [PMID: 27031940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND After successful guidewire passage, failure to cross the occluded segment with a balloon is the most common cause of procedural failure in coronary chronic total occlusion (CTO) intervention. We evaluated the safety and efficacy of the balloon-assisted microdissection (BAM) technique for treating these complex balloon-uncrossable lesions. METHODS We identified consecutive cases treated with BAM for balloon-uncrossable CTOs between January 2012 and February 2015 at two experienced CTO percutaneous coronary intervention (PCI) centers and reviewed their clinical and angiographic characteristics and procedural outcomes. RESULTS During the study period, a total of 17 patients had BAM performed for balloon-uncrossable CTOs. Mean age was 65.5 ± 8.7 years and 94% of patients were males who often had prior myocardial infarction, PCI, and coronary artery bypass graft surgery. The most common CTO target vessel was the right coronary artery. Mean J-CTO score was 2.6 ± 1.1. Despite high lesion complexity, overall procedural success was 94% and BAM facilitated success in approximately one-half of these cases. All BAM failure cases except 1 were successfully recanalized utilizing additional techniques. No patient experienced a major complication. CONCLUSION BAM is a simple, inexpensive, and safe technique that can facilitate crossing of balloon-uncrossable CTOs and can be considered as first-line treatment for these complex lesions.
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Affiliation(s)
| | | | | | | | | | - Emmanouil S Brilakis
- Dallas VA Medical Center (111A), 4500 South Lancaster Road, Dallas, TX 75216 USA.
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Affiliation(s)
- Emmanouil S Brilakis
- VA North Texas Healthcare System and University of Texas Southwestern Medical Center, Dallas, Texas.
| | - Minh N Vo
- University of Manitoba, Section of Cardiology, St. Boniface Hospital, Winnipeg, Manitoba
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Khalili H, Vo MN, Brilakis ES. Initial Experience With the Gaia Composite Core Guidewires in Coronary Chronic Total Occlusion Crossing. J Invasive Cardiol 2016; 28:E22-E25. [PMID: 26841443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Inability to cross the occlusion with a guidewire is the most common cause of failure of coronary chronic total occlusion (CTO) interventions. We describe two cases of successful application of the novel Gaia family of coronary guidewires (Asahi Intecc) for crossing coronary CTOs using all available crossing strategies, namely antegrade wire escalation, antegrade dissection/reentry, and retrograde.
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Affiliation(s)
| | | | - Emmanouil S Brilakis
- VA North Texas Health Care System, The University of Texas Southwestern Medical Center at Dallas, Division of Cardiology (111A), 4500 S. Lancaster Rd, Dallas, TX 75216 USA.
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Vo MN, Karmpaliotis D, Brilakis ES. “Move the cap” technique for ambiguous or impenetrable proximal cap of coronary total occlusion. Catheter Cardiovasc Interv 2015; 87:742-8. [DOI: 10.1002/ccd.26079] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 05/06/2015] [Accepted: 05/23/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Minh N. Vo
- Section of Cardiology; University of Manitoba, St. Boniface Hospital; Winnipeg Manitoba Canada
| | - Dimitri Karmpaliotis
- Division of Cardiology, Department of Medicine, Columbia University Medical Center; New York New York
| | - Emmanouil S. Brilakis
- Division of Cardiology, Department of Medicine, VA North Texas Healthcare System and University of Texas Southwestern Medical Center; Dallas Texas
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Abstract
Chronic total occlusions (CTOs) are commonly found in patients with coronary artery disease, and a system of collateral connections are found in almost all of these patients. These collateral vessels serve to prevent myocardial necrosis but are not sufficient to prevent myocardial ischemia during exercise. Unfortunately, the presence of well-developed collaterals has been used as argument against CTO revascularization. Many continue to falsely believe that these patients are "protected" by collaterals and, therefore, CTO recanalization is not indicated. Our knowledge of the physiologic significance of coronary collaterals has increased significantly over the past several years. Studies utilizing coronary pressure and flow velocity have answered a number of basic physiologic questions. We therefore sought to review the evidence for coronary collateral flow and their clinical significance in patients with CTOs.
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Affiliation(s)
- Minh N Vo
- a University of Manitoba, Section of Cardiology, St. Boniface Hospital, 409 Tache Ave., Winnipeg, MB R2H 2A6, Canada
| | - Emmanouil S Brilakis
- b Veterans Affairs North Texas Healthcare System; University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Malek Kass
- a University of Manitoba, Section of Cardiology, St. Boniface Hospital, 409 Tache Ave., Winnipeg, MB R2H 2A6, Canada
| | - Amir Ravandi
- a University of Manitoba, Section of Cardiology, St. Boniface Hospital, 409 Tache Ave., Winnipeg, MB R2H 2A6, Canada
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Vo MN, Ravandi A, Brilakis ES. "Tip-in" technique for retrograde chronic total occlusion revascularization. J Invasive Cardiol 2015; 27:E62-E64. [PMID: 25929304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Use of the retrograde approach significantly improves the success rate of chronic total occlusion (CTO) percutaneous coronary intervention. The most commonly applied retrograde technique is placing a guidewire just distal to the distal cap using collateral vessels, with subsequent retrograde crossing of the occlusive segment. This is followed by advancement of a microcatheter and externalization of a long guidewire to allow antegrade delivery of balloons and stents. However, there are occasions when a microcatheter or balloon cannot be delivered retrogradely through the occlusive segment, resulting in procedure failure. We describe the "tip-in" technique, which involves intubation of the retrograde guidewire with an antegrade microcatheter to allow successful revascularization of a CTO after failure to externalize.
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Affiliation(s)
- Minh N Vo
- Section of Cardiology, St. Boniface Hospital, University of Manitoba, Winnipeg, Canada.
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Vo MN, McCabe JM, Lombardi WL, Ducas J, Ravandi A, Brilakis ES. Adoption of the hybrid CTO approach by a single non-CTO operator: procedural and clinical outcomes. J Invasive Cardiol 2015; 27:139-144. [PMID: 25740965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND The feasibility of adopting the "hybrid" approach by a single operator without prior experience in percutaneous coronary intervention (PCI) of chronic total occlusions (CTOs) has not been described. METHODS Consecutive patients who underwent CTO-PCI by a single operator using the "hybrid" approach between 2012 and 2013 formed the analytic cohort. No patient was declined on the basis of angiographic findings. Clinical and angiographic characteristics together with procedural and hospital outcomes are described. RESULTS During the study period, a total of 48 consecutive patients underwent PCI of 50 CTOs. Mean age was 63.4 ± 9.4 years and most patients (83%) were men. The right coronary artery (RCA) was the most commonly treated CTO vessel (54%) and mean J-CTO score was 2.3 ± 1.1. A primary retrograde approach was chosen for 33% of lesions and 40% required use of an epicardial collateral vessel. The primary strategy was effective in 65% of successful cases, 35% required one change in strategy, and 15% requiring two strategy changes. Procedural success rate was 92%. The median number of stents used was 3 (interquartile range [IQR], 2-4] and the total stent length was 73 mm [IQR, 38-96 mm). Mean contrast volume was 356.4 ± 148.3 mL and the mean air kerma radiation exposure was 3.5 ± 2.0 Gy. No patient experienced a major periprocedural complication. CONCLUSION The "hybrid" approach to CTO-PCI can be successfully adopted by a single operator with excellent early procedural success and low complication rates, despite a lack of prior CTO-PCI experience.
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Affiliation(s)
- Minh N Vo
- Section of Cardiology, St. Boniface Hosipital, University of Manitoba, Winnipeg, Canada.
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Vo MN, Ravandi A, Grantham JA. Subintimal space plaque modification for "balloon-uncrossable" chronic total occlusions. J Invasive Cardiol 2014; 26:E133-E136. [PMID: 25274869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Novel techniques for percutaneous revascularization of chronic total occlusions or other complex coronary lesions utilize the subintimal space to safely and efficiently traverse the occluded coronary segment. Antegrade and retrograde dissection reentry is gaining popularity, and is an elegant method to successfully cross coronary chronic total occlusions. We describe a "subintimal space plaque modification" that involves use of antegrade and retrograde dissection reentry techniques to treat "balloon-uncrossable" coronary lesions.
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Affiliation(s)
- Minh N Vo
- University of Manitoba, 409 Tache Ave, Winnipeg, Manitoba R2H 2A6, Canada.
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Vo MN, Evans M, Leitzel K, Ali SM, Wilson M, Demers L, Evans DB, Lipton A. Elevated plasma endoglin (CD105) predicts decreased response and survival in a metastatic breast cancer trial of hormone therapy. Breast Cancer Res Treat 2008; 119:767-71. [PMID: 19115106 DOI: 10.1007/s10549-008-0261-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2008] [Accepted: 11/20/2008] [Indexed: 11/26/2022]
Abstract
Background Endoglin (CD105) is a co-receptor for TGF-beta, is expressed by human vascular endothelial cells, and plays a major role in angiogenesis. Materials and methods Pretreatment EDTA plasma from 224 metastatic breast cancer patients enrolled in a phase III 2nd-line hormone therapy trial and 50 control subjects were assayed for endoglin using an ELISA. Results The female control group (n = 50) plasma endoglin upper limit of normal was defined as the mean + 2 SD (8.7 ng/ml). The breast cancer patient plasma endoglin was 6.40 +/- 2.23 ng/ml (range 3.00-19.79 ng/ml). Elevated plasma endoglin levels were detected in 26 of 224 patients (11.6%). Patients with elevated plasma endoglin had a reduced clinical benefit rate (CR + PR + Stable) (15 vs. 42%) (P = 0.01) to hormone therapy. TTP was shorter for patients with elevated plasma endoglin, but did not reach statistical significance (P = 0.2). Patients with elevated plasma endoglin had decreased overall survival (median 645 vs. 947 days) (P = 0.005). Conclusion Elevated pretreatment plasma endoglin levels predicted for decreased clinical benefit and a shorter overall survival in metastatic breast cancer patients treated with 2nd-line hormone therapy.
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Affiliation(s)
- M N Vo
- Hershey Medical Center, Penn State University, Hershey, PA, USA
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Furge KA, Kiewlich D, Le P, Vo MN, Faure M, Howlett AR, Lipson KE, Vande Woude GF, Webb CP. Suppression of Ras-mediated tumorigenicity and metastasis through inhibition of the Met receptor tyrosine kinase. Proc Natl Acad Sci U S A 2001; 98:10722-7. [PMID: 11535809 PMCID: PMC58533 DOI: 10.1073/pnas.191067898] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Mutations in the Ras family of GTP binding proteins represent one of the most frequently observed genetic alterations in human cancers. We and others have recently demonstrated that expression of Met, the tyrosine kinase receptor for hepatocyte growth factor/scatter factor (HGF/SF), is significantly up-regulated in Ras-transformed cells. Because HGF/SF-Met signaling is proposed to play a prominent role in tumor development and progression, we assessed the possible requirement for Met during Ras-mediated tumor growth and metastasis. To disrupt endogenous Met signaling, we constructed dominant-negative mutants of both human and murine Met and showed that these can inhibit HGF/SF-mediated Met signaling and cell invasion of ras-transformed cells in vitro. Moreover, ectopic expression of dominant-negative Met mutants reduced the s.c. tumor growth of ras-transformed cells and dramatically suppressed their ability to form lung metastases in vivo. Our data demonstrate that Met plays a prominent role during Ras-mediated tumor growth and metastasis, and further suggest that agents that inhibit HGF/SF-Met signaling may represent an important therapeutic avenue for the treatment of a variety of malignant tumors.
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Affiliation(s)
- K A Furge
- Molecular Oncology Laboratory, Van Andel Institute, 333 Bostwick, Northeast, Grand Rapids, MI 49503, USA
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