Author
Martin B. Leon
Other affiliations: MedStar Washington Hospital Center, Columbia University Medical Center, Icahn School of Medicine at Mount Sinai
Bio: Martin B. Leon is an academic researcher from Columbia University. The author has contributed to research in topics: Valve replacement & Stent. The author has an hindex of 12, co-authored 16 publications receiving 4040 citations. Previous affiliations of Martin B. Leon include MedStar Washington Hospital Center & Columbia University Medical Center.
Topics: Valve replacement, Stent, Angioplasty, Revascularization, Percutaneous
Papers
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TL;DR: This study compared the efficacy and safety of three antithrombotic-drug regimens — aspirin alone, aspirin and warfarin, and aspirin and ticlopidine — after coronary stenting to prevent stent thrombosis.
Abstract: Background Antithrombotic drugs are used after coronary-artery stenting to prevent stent thrombosis. We compared the efficacy and safety of three antithrombotic-drug regimens — aspirin alone, aspirin and warfarin, and aspirin and ticlopidine — after coronary stenting. Methods Of 1965 patients who underwent coronary stenting at 50 centers, 1653 (84.1 percent) met angiographic criteria for successful placement of the stent and were randomly assigned to one of three regimens: aspirin alone (557 patients), aspirin and warfarin (550 patients), or aspirin and ticlopidine (546 patients). All clinical events reflecting stent thrombosis were included in the prespecified primary end point: death, revascularization of the target lesion, angiographically evident thrombosis, or myocardial infarction within 30 days. Results The primary end point was observed in 38 patients: 20 (3.6 percent) assigned to receive aspirin alone, 15 (2.7 percent) assigned to receive aspirin and warfarin, and 3 (0.5 percent) assigned to rece...
1,672 citations
TL;DR: In this article, the authors report the first multicenter randomized trial to evaluate use of a distal embolic protection device during stenting of venous aorto-coronary bypass grafts.
Abstract: Background— Stents provide effective treatment for stenotic saphenous venous aorto-coronary bypass grafts, but their placement carries a 20% incidence of procedure-related complications, which potentially are related to the distal embolization of atherosclerotic debris. We report the first multicenter randomized trial to evaluate use of a distal embolic protection device during stenting of such lesions. Methods and Results— Of 801 eligible patients, 406 were randomly assigned to stent placement over the shaft of the distal protection device, and 395 were assigned to stent placement over a conventional 0.014-inch angioplasty guidewire (control group). The primary end point—a composite of death, myocardial infarction, emergency bypass, or target lesion revascularization by 30 days—was observed in 65 patients (16.5%) assigned to the control group and 39 patients (9.6%) assigned to the embolic protection device (P=0.004). This 42% relative reduction in major adverse cardiac events was driven by myocardial inf...
683 citations
TL;DR: Treatment with aspirin and ticlopidine after coronary stenting resulted in a lower rate of stent thrombosis, although there were more hemorrhagic complications than with aspirin alone.
Abstract: Background Antithrombotic drugs are used after coronary-artery stenting to prevent stent thrombosis. We compared the efficacy and safety of three antithrombotic-drug regimens — aspirin alone, aspirin and warfarin, and aspirin and ticlopidine — after coronary stenting. Methods Of 1965 patients who underwent coronary stenting at 50 centers, 1653 (84.1 percent) met angiographic criteria for successful placement of the stent and were randomly assigned to one of three regimens: aspirin alone (557 patients), aspirin and warfarin (550 patients), or aspirin and ticlopidine (546 patients). All clinical events reflecting stent thrombosis were included in the prespecified primary end point: death, revascularization of the target lesion, angiographically evident thrombosis, or myocardial infarction within 30 days. Results The primary end point was observed in 38 patients: 20 (3.6 percent) assigned to receive aspirin alone, 15 (2.7 percent) assigned to receive aspirin and warfarin, and 3 (0.5 percent) assigned to rece...
567 citations
Icahn School of Medicine at Mount Sinai1, Technische Universität München2, University of Florida3, University of Catania4, Aix-Marseille University5, Beth Israel Deaconess Medical Center6, McMaster University7, Food and Drug Administration8, Harvard University9, University of London10, Uppsala University11, Seoul National University Hospital12, Kyoto University13, Pharmaceuticals and Medical Devices Agency14, Columbia University Medical Center15, National University of Ireland, Galway16, Scripps Health17, Durham University18, Erasmus University Medical Center19, Core Laboratories20, University of Bern21, Paris Descartes University22, Duke University23
TL;DR: This research presents a novel probabilistic approach that allows us to assess the importance of knowing the carrier and removal status of canine coronavirus, as a source of infection for other animals.
Abstract: Identification and management of patients at high bleeding risk undergoing percutaneous coronary intervention are of major importance, but a lack of standardization in defining this population limi ...
450 citations
Columbia University1, University of British Columbia2, Cleveland Clinic3, MedStar Washington Hospital Center4, Stanford University5, Northwestern University6, Harvard University7, Cedars-Sinai Medical Center8, Cornell University9, Emory University10, University of Pennsylvania11, University of Miami12
TL;DR: Major VC were frequent after TF-TAVR in the PARTNER trial using first-generation devices and were associated with high mortality, however, the incidence and impact of major VC on 1-year mortality decreased with lower-risk populations.
436 citations
Cited by
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TL;DR: The once-in-a-lifetime treatment with Abciximab Intracoronary for acute coronary syndrome and a second dose intravenously for atrial fibrillation is recommended for adults with high blood pressure.
Abstract: ACE
: angiotensin-converting enzyme
ACS
: acute coronary syndrome
ADP
: adenosine diphosphate
AF
: atrial fibrillation
AMI
: acute myocardial infarction
AV
: atrioventricular
AIDA-4
: Abciximab Intracoronary vs. intravenously Drug Application
APACHE II
: Acute Physiology Aand Chronic
7,519 citations
TL;DR: Criteria for assessment of death, myocardial infarction, repeat revascularization, and stent thrombosis were developed and provide consistency across studies that can facilitate the evaluation of safety and effectiveness of these devices.
Abstract: Background— Although most clinical trials of coronary stents have measured nominally identical safety and effectiveness end points, differences in definitions and timing of assessment have created confusion in interpretation. Methods and Results— The Academic Research Consortium is an informal collaboration between academic research organizations in the United States and Europe. Two meetings, in Washington, DC, in January 2006 and in Dublin, Ireland, in June 2006, sponsored by the Academic Research Consortium and including representatives of the US Food and Drug Administration and all device manufacturers who were working with the Food and Drug Administration on drug-eluting stent clinical trial programs, were focused on consensus end point definitions for drug-eluting stent evaluations. The effort was pursued with the objective to establish consistency among end point definitions and provide consensus recommendations. On the basis of considerations from historical legacy to key pathophysiological mechani...
4,994 citations
TL;DR: Authors/Task Force Members: Franz-Josef Neumann* (ESC Chairperson) (Germany), Miguel Sousa-Uva* (EACTS Chair person) (Portugal), Anders Ahlsson (Sweden), Fernando Alfonso (Spain), Adrian P. Banning (UK), Umberto Benedetto (UK).
4,342 citations
TL;DR: Neumann et al. as discussed by the authors proposed a task force to evaluate the EACTS Review Co-ordinator's work on gender equality in the context of women's reproductive health.
Abstract: Authors/Task Force Members: Franz-Josef Neumann* (ESC Chairperson) (Germany), Miguel Sousa-Uva* (EACTS Chairperson) (Portugal), Anders Ahlsson (Sweden), Fernando Alfonso (Spain), Adrian P. Banning (UK), Umberto Benedetto (UK), Robert A. Byrne (Germany), Jean-Philippe Collet (France), Volkmar Falk (Germany), Stuart J. Head (The Netherlands), Peter Jüni (Canada), Adnan Kastrati (Germany), Akos Koller (Hungary), Steen D. Kristensen (Denmark), Josef Niebauer (Austria), Dimitrios J. Richter (Greece), Petar M. Seferovi c (Serbia), Dirk Sibbing (Germany), Giulio G. Stefanini (Italy), Stephan Windecker (Switzerland), Rashmi Yadav (UK), Michael O. Zembala (Poland) Document Reviewers: William Wijns (ESC Review Co-ordinator) (Ireland), David Glineur (EACTS Review Co-ordinator) (Canada), Victor Aboyans (France), Stephan Achenbach (Germany), Stefan Agewall (Norway), Felicita Andreotti (Italy), Emanuele Barbato (Italy), Andreas Baumbach (UK), James Brophy (Canada), Héctor Bueno (Spain), Patrick A. Calvert (UK), Davide Capodanno (Italy), Piroze M. Davierwala
3,879 citations
Columbia University1, Scott & White Hospital2, Cedars-Sinai Medical Center3, Cleveland Clinic4, Emory University5, Stanford University6, University of Pennsylvania7, MedStar Washington Hospital Center8, Hospital Corporation of America9, New York University10, Advocate Lutheran General Hospital11, Mayo Clinic12, Primary Children's Hospital13, Laval University14, University of British Columbia15
TL;DR: In intermediate-risk patients, TAVR was similar to surgical aortic-valve replacement with respect to the primary end point of death or disabling stroke; surgery resulted in fewer major vascular complications and less paravalvular aorta regurgitation.
Abstract: BackgroundPrevious trials have shown that among high-risk patients with aortic stenosis, survival rates are similar with transcatheter aortic-valve replacement (TAVR) and surgical aortic-valve replacement. We evaluated the two procedures in a randomized trial involving intermediate-risk patients. MethodsWe randomly assigned 2032 intermediate-risk patients with severe aortic stenosis, at 57 centers, to undergo either TAVR or surgical replacement. The primary end point was death from any cause or disabling stroke at 2 years. The primary hypothesis was that TAVR would not be inferior to surgical replacement. Before randomization, patients were entered into one of two cohorts on the basis of clinical and imaging findings; 76.3% of the patients were included in the transfemoral-access cohort and 23.7% in the transthoracic-access cohort. ResultsThe rate of death from any cause or disabling stroke was similar in the TAVR group and the surgery group (P=0.001 for noninferiority). At 2 years, the Kaplan–Meier event...
3,744 citations