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Ramotowski B, Lewandowski P, Słomski T, Maciejewski P, Budaj A. Platelet reactivity and activated clotting time predict hemorrhagic site complications in patients with chronic coronary syndromes undergoing percutaneous coronary interventions. Coron Artery Dis 2024; 35:292-298. [PMID: 38241058 DOI: 10.1097/mca.0000000000001336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
BACKGROUND Radial access is preferred in patients with chronic coronary syndromes (CCSs) treated with ad hoc percutaneous coronary intervention (PCI). Antithrombotic and antiplatelet treatment before PCI may affect outcomes at vascular access sites. QuikClot Radial is a kaolin-based band that may shorten hemostasis time. Using point-of-care testing, we investigated the effect of antithrombotic and antiplatelet treatment on access-site complications. METHODS This prospective observational study included consecutive patients with CCS on chronic aspirin therapy referred for ad hoc PCI. The activated clotting time (ACT), global thrombosis test and VerifyNow P2Y 12 test were done sequentially after unfractionated heparin (UFH) and clopidogrel administration. Patients were monitored for radial artery patency, bleeding and local hematoma until discharge. RESULTS We enrolled 40 patients [mean age, 68.8 ± 8.8 years; men, 30 (75%)] who received UFH (median dose, 8000 IU; interquartile range, 7000-9000 IU) and clopidogrel (600 mg). All radial arteries remained patent during follow-up. Local bleeding and hematomas were noted in 11 patients (27.5%) each. Patients with bleeding had lower mean platelet activity at 2 h [122.5 ± 51 platelet reactivity units (PRU) vs. 158.7 ± 43 PRU, P = 0.04] and higher ACT (216.9 ± 40 s vs. 184.6 ± 28 s, P = 0.006) than patients without bleeding. An ACT >196 s at 2 h predicted bleeding or hematoma (AUC, 0.72; 95% CI, 0.56-0.85, P = 0.008). CONCLUSION Lower platelet activity and higher ACT after PCI were associated with higher bleeding risk at a vascular access site. Point-of-care testing of ACT after the procedure may help identify patients with CCS undergoing PCI who are at higher risk of access-site bleeding.
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Affiliation(s)
- Bogumił Ramotowski
- Department of Cardiology, Centre of Postgraduate Medical Education, Warsaw, Poland
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Bainey KR, Marquis-Gravel G, Mehta SR, Tanguay JF. The Evolution of Anticoagulation for Percutaneous Coronary Intervention: A 40-Year Journey. Can J Cardiol 2022; 38:S89-S98. [PMID: 35850382 DOI: 10.1016/j.cjca.2022.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 07/09/2022] [Accepted: 07/12/2022] [Indexed: 12/30/2022] Open
Abstract
The selection of antithrombotic strategies continue to be of utmost importance during percutaneous coronary intervention (PCI) and have evolved over the past 40 years. Although the backbone of therapy during PCI continues to be a combination of oral antiplatelets and parenteral anticoagulants, a variety of different approaches have been tested over time. In particular, different choices of anticoagulation management have been tested in the stable ischemic heart disease and acute coronary syndrome setting. Evaluation of alternative regimens in the quest to balance ischemic and bleeding risk have undoubtedly improved patient care with PCI. In the current review we highlight the evolution of evidence-based therapeutic options over the past 40 years from the beginning of coronary angioplasty to contemporary PCI. We provide insight into future therapeutic options and provide a contemporary overview of anticoagulation choices for patients who require PCI on the basis of up-to-date evidence balancing ischemic and bleeding risk and according to clinical presentation.
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Affiliation(s)
- Kevin R Bainey
- Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada.
| | | | - Shamir R Mehta
- Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton, Ontario, Canada
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3
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Gurbel PA, Rout A, Tantry US. Monitoring and Reversal of Anticoagulation and Antiplatelet Agents. Interv Cardiol 2022. [DOI: 10.1002/9781119697367.ch46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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4
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Ratcliffe FM, Kharbanda R, Foëx P. Perioperative ST-elevation myocardial infarction: with time of the essence, is there a case for guidelines? Br J Anaesth 2019; 123:548-554. [PMID: 31543267 DOI: 10.1016/j.bja.2019.08.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 08/02/2019] [Accepted: 08/22/2019] [Indexed: 10/26/2022] Open
Affiliation(s)
- Fiona M Ratcliffe
- Nuffield Department of Anaesthetics, John Radcliffe Hospital, Oxford, UK.
| | | | - Pierre Foëx
- Nuffield Department of Anaesthetics, John Radcliffe Hospital, Oxford, UK
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5
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Hermanides R, Dambrink JH, Boer MJ, Hoorntje J, Gosselink AT, Suryapranata H, Zijlstra F, van ’t Hof A, Ottervanger J. Suboptimal anticoagulation with pre-hospital heparin in ST-elevation myocardial infarction. Thromb Haemost 2017; 106:636-40. [DOI: 10.1160/th11-04-0257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 07/08/2011] [Indexed: 11/05/2022]
Abstract
SummaryThis is a prospective, observational study performed in all consecutive ST-elevation myocardial infarction (STEMI) patients who had activated clotting time (ACT) measurement on arrival in the cathlab before coronary angiography. We studied the therapeutic effects of a pre-hospital fixed heparin bolus dose in consecutive patients with STEMI. A total of 1,533 patients received pre-hospital administration of aspirin, high dose clopidogrel (600 mg) and a fixed bolus dose of 5,000 IU unfractionated heparin (UFH), according to the national ambulance protocols. Some patients were also treated with glycoprotein IIb/IIIa inhibitors (GPI) in the ambulance. A therapeutic ACT range was defined according to the ESC guidelines as 200–250 seconds when patients had GPI pretreatment and 250–350 seconds when no GPI pretreatment. Of the 1,533 patients, 216 patients (14.1%) had an ACT within the therapeutic range, 82.3% of the patients had a too low ACT, whereas 3.5% of the patients had a too high ACT. After multivariable analysis, the only independent predictor of a too low ACT was increasing weight (odds ratio 1.02/kg, 95% confidence interval 1.01–1.03, p=0.001). Patients with a too low ACT had less often an open infarct related vessel (initial TIMI flow 2,3) as compared to patients with an ACT in range (36.5% vs. 45.9%, p=0.013). In only a minority of patients with STEMI, pre-hospital treatment with a fixed bolus dose UFH is within the therapeutic ACT range. Increased weight is an independent determinant of a too low ACT. We strongly recommend weight adjusted administration of UFH in the ambulance.
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6
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Yost GW, Steinhubl SR. Monitoring and Reversal of Anticoagulation and Antiplatelet Agents. Interv Cardiol 2016. [DOI: 10.1002/9781118983652.ch49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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7
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Tadros GM, Broder K, Bachour F. Intracoronary Macrothrombus Formation During Percutaneous Coronary Intervention Despite Optimal Activated Clotting Time Using Bivalirudin. Angiology 2016; 56:761-5. [PMID: 16327953 DOI: 10.1177/000331970505600614] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The occurrence of intracoronary thrombus during percutaneous coronary intervention (PCI) is a well-known complication. It has been estimated that it complicates approximately 6% of all coronary procedures. Patients at highest risk for this complication include those with acute ischemic syndromes or with angiographically apparent thrombus. Since the development of PCI, intravenous unfractionated heparin (UFH) has remained the primary antithrombotic therapy for the prevention of periprocedural ischemic complications. The availability of a rapid “point of care” test for dose individualization (the activated clotting time [ACT]) has facilitated this process. Other forms of antithrombotic therapies such as direct thrombin inhibitors or low-molecular-weight heparin have been proposed as more effective anticoagulants during PCI. Bivalirudin is a direct thrombin inhibitor proven to decrease post-PCI ischemic complication rate compared with UFH and have a lower vascular complication rate compared with glycoprotein IIb/IIIa receptor antagonists. We herein report a case of acute macrothrombus formation during PCI despite adequate ACT achieved with bivalirudin.
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Affiliation(s)
- George M Tadros
- Division of Cardiology, University of Minnesota, Minneapolis, MN, USA
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8
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Abstract
The use of low molecular weight heparin (LMWH) for the prevention and treatment of venous thromboembolism has been validated by numerous clinical trials and meta-analyses over the past 25 years. More recently, the possibility of extending treatment with LMWH to the arterial disease where thrombosis is a prominent feature has led to the planning of many clinical trials, several of which have been already published. LMWH has been tested in settings such as acute coronary syndromes, including myocardial infarction, surgery or percutaneous revascularization for coronary and peripheral arteries, and stroke. In most indications, LMWH has proved to be superior to or at least as effective as unfractionated heparin and it is also easier to administer.
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Affiliation(s)
- Giuseppe G Nenci
- Istituto di Medicina Interna e Medicina Vascolare, Università di Perugia, Perugia, Italy
| | - Alessandra Minciotti
- Istituto di Medicina Interna e Medicina Vascolare, Università di Perugia, Perugia, Italy
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9
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Mottillo S, Filion KB, Joseph L, Eisenberg MJ. Defining optimal activated clotting time for percutaneous coronary intervention: A systematic review and Bayesian meta-regression. Catheter Cardiovasc Interv 2016; 89:351-366. [DOI: 10.1002/ccd.26652] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/09/2016] [Accepted: 06/04/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Salvatore Mottillo
- Center for Clinical Epidemiology; Lady Davis Institute, Jewish General Hospital/McGill University; Montreal Quebec Canada
- Department of Epidemiology, Biostatistics, and Occupational Health; McGill University; Montreal Quebec Canada
- Department of Emergency Medicine; McGill University Health Center; Montreal Quebec Canada
| | - Kristian B. Filion
- Center for Clinical Epidemiology; Lady Davis Institute, Jewish General Hospital/McGill University; Montreal Quebec Canada
- Department of Epidemiology, Biostatistics, and Occupational Health; McGill University; Montreal Quebec Canada
- Division of Clinical Epidemiology; Department of Medicine; McGill University; Montreal Quebec Canada
| | - Lawrence Joseph
- Department of Epidemiology, Biostatistics, and Occupational Health; McGill University; Montreal Quebec Canada
- Division of Clinical Epidemiology; McGill University Health Center; Montreal Quebec Canada
| | - Mark J. Eisenberg
- Center for Clinical Epidemiology; Lady Davis Institute, Jewish General Hospital/McGill University; Montreal Quebec Canada
- Department of Epidemiology, Biostatistics, and Occupational Health; McGill University; Montreal Quebec Canada
- Divisions of Cardiology and Clinical Epidemiology; Jewish General Hospital/McGill University; Montreal Quebec Canada
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10
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Rajpurohit N, Gulati R, Lennon RJ, Singh M, Rihal CS, Santrach PJ, Donato LJ, Karon BS, Del-Carpio F, Tak T, Motiei A, Lopes RD, Gharacholou SM. Relation of Activated Clotting Times During Percutaneous Coronary Intervention to Outcomes. Am J Cardiol 2016; 117:703-8. [PMID: 26762725 DOI: 10.1016/j.amjcard.2015.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/03/2015] [Accepted: 12/03/2015] [Indexed: 11/28/2022]
Abstract
Monitoring anticoagulation using the activated clotting time (ACT) in patients treated with heparin and undergoing percutaneous coronary intervention (PCI) is one of the most frequently used tests in invasive cardiology. However, despite its widespread use and guideline endorsement, uncertainty remains regarding the association of ACT with outcomes in contemporary practice. We reviewed all PCI procedures performed at the Mayo Clinic (Rochester, Minnesota) from October 2001 to December 2012 and evaluated the association between the ACT before device activation and in-hospital and 1-year outcomes. ACT values were grouped into tertiles for descriptive purposes and analyzed as a continuous variable for assessment of outcomes. We used logistic and Cox proportional hazards regression models to estimate the association of ACT and outcomes. Of the 12,055 patients who underwent PCI with an ACT value before device activation, 3,977 (33.0%) had an ACT <227, 4,046 (33.6%) had an ACT 227 to 285, and 4,032 (33.4%) had an ACT >285. Baseline and procedural characteristics were similar across ACT tertiles. In unadjusted analysis, higher ACT values were associated with death (p <0.001), bleeding (p = 0.024), procedural complication (p <0.001), and higher 1-year events (cardiac death, p <0.001; cardiac death/myocardial infarction, p = 0.022). After multivariable adjustment for baseline and procedural characteristics, ACT was not independently associated with in-hospital or 1-year ischemic, thrombotic, or bleeding outcomes. In conclusion, ACT values before device activation are not independently associated with clinically important outcomes in contemporary PCI practice.
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Affiliation(s)
- Naveen Rajpurohit
- Division of Cardiology, Department of Medicine, University of South Dakota, Sanford Cardiovascular Institute, Sioux Falls, South Dakota
| | - Rajiv Gulati
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Ryan J Lennon
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota
| | - Mandeep Singh
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Charanjit S Rihal
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Paula J Santrach
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Leslie J Donato
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Brad S Karon
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Freddy Del-Carpio
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, Minnesota; Division of Cardiology, Department of Medicine, Mayo Clinic Health System, La Crosse, Wisconsin
| | - Tahir Tak
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, Minnesota; Division of Cardiology, Department of Medicine, Mayo Clinic Health System, La Crosse, Wisconsin
| | - Arashk Motiei
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, Minnesota; Division of Cardiology, Department of Medicine, Mayo Clinic Health System, Mankato, Minnesota
| | - Renato D Lopes
- Duke Clinical Research Institute, Durham, North Carolina
| | - Shahyar Michael Gharacholou
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, Minnesota; Division of Cardiology, Department of Medicine, Mayo Clinic Health System, La Crosse, Wisconsin.
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11
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Ndrepepa G, Kastrati A. Activated Clotting Time During Percutaneous Coronary Intervention. Circ Cardiovasc Interv 2015; 8:CIRCINTERVENTIONS.115.002576. [DOI: 10.1161/circinterventions.115.002576] [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] [Indexed: 11/16/2022]
Affiliation(s)
- Gjin Ndrepepa
- From the Deutsches Herzzentrum, Technische Universität München, Munich, Germany (G.N., A.K.); and DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany (A.K.)
| | - Adnan Kastrati
- From the Deutsches Herzzentrum, Technische Universität München, Munich, Germany (G.N., A.K.); and DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany (A.K.)
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12
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Bai M, He CY, Qi XS, Yin ZX, Wang JH, Guo WG, Niu J, Xia JL, Zhang ZL, Larson AC, Wu KC, Fan DM, Han GH. Shunting branch of portal vein and stent position predict survival after transjugular intrahepatic portosystemic shunt. World J Gastroenterol 2014; 20:774-785. [PMID: 24574750 PMCID: PMC3921486 DOI: 10.3748/wjg.v20.i3.774] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 10/22/2013] [Accepted: 11/03/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the effect of the shunting branch of the portal vein (PV) (left or right) and the initial stent position (optimal or suboptimal) of a transjugular intrahepatic portosystemic shunt (TIPS).
METHODS: We retrospectively reviewed 307 consecutive cirrhotic patients who underwent TIPS placement for variceal bleeding from March 2001 to July 2010 at our center. The left PV was used in 221 patients and the right PV in the remaining 86 patients. And, 224 and 83 patients have optimal stent position and sub-optimal stent positions, respectively. The patients were followed until October 2011 or their death. Hepatic encephalopathy, shunt dysfunction, and survival were evaluated as outcomes. The difference between the groups was compared by Kaplan-Meier analysis. A Cox regression model was employed to evaluate the predictors.
RESULTS: Among the patients who underwent TIPS to the left PV, the risk of hepatic encephalopathy (P = 0.002) and mortality were lower (P < 0.001) compared to those to the right PV. Patients who underwent TIPS with optimal initial stent position had a higher primary patency (P < 0.001) and better survival (P = 0.006) than those with suboptimal initial stent position. The shunting branch of the portal vein and the initial stent position were independent predictors of hepatic encephalopathy and shunt dysfunction after TIPS, respectively. And, both were independent predictors of survival.
CONCLUSION: TIPS placed to the left portal vein with optimal stent position may reduce the risk of hepatic encephalopathy and improve the primary patency rates, thereby prolonging survival.
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Abstract
Since percutaneous transluminal coronary angioplasty was first described and the breakthrough studies of the role of stents were reported, the evolution in anticoagulation and antiplatelet therapy used during percutaneous coronary intervention (PCI) has reduced periprocedural ischemic events and stent thrombosis. Although greater combinations and doses of anticoagulation with antiplatelets seem to provide the best protection against thrombogenic and embolic events, there is a significant trade-off with a higher risk of major and minor bleeding episodes. This review article expands on each of the commonly used antiplatelet and anticoagulants used at time of PCI, focusing on drug monitoring and reversal.
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Affiliation(s)
- Gregory W Yost
- Department of Cardiology, Geisinger Medical Center, 100 North Academy Avenue, Danville, PA 17822, USA.
| | - Steven R Steinhubl
- Department of Cardiology, Geisinger Medical Center, 100 North Academy Avenue, Danville, PA 17822, USA
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Depta JP, Bhatt DL. Aspirin and platelet adenosine diphosphate receptor antagonists in acute coronary syndromes and percutaneous coronary intervention: role in therapy and strategies to overcome resistance. Am J Cardiovasc Drugs 2012; 8:91-112. [PMID: 18422393 DOI: 10.1007/bf03256587] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Platelet activation and aggregation are key components in the cascade of events causing thrombosis following plaque rupture. Antiplatelet therapy is essential in the treatment of patients with acute coronary syndromes (ACS) and for those requiring percutaneous coronary intervention (PCI). Aspirin (acetylsalicylic acid) is a well established antiplatelet therapy and is mandated for secondary prevention of cardiovascular events following ACS. In patients with ACS, the addition of clopidogrel to aspirin is more effective than aspirin alone. For patients undergoing PCI, dual antiplatelet therapy with aspirin and clopidogrel is warranted. Aspirin should be continued indefinitely after PCI. Pretreatment of patients with clopidogrel prior to PCI lowers the incidence of cardiovascular events, yet the optimum timing of drug administration and dose are still being investigated, as is the duration of therapy following PCI. Late-stent thrombosis with drug-eluting stents has pushed the recommendation for duration of clopidogrel therapy up to 1 year and perhaps beyond, in patients without risks for bleeding. The concepts of aspirin and clopidogrel resistance are important clinical questions. No uniform definition exists for aspirin or clopidogrel resistance. Measurements of resistance are often highly variable and do not necessarily correlate with clinical resistance. Noncompliance remains the most prominent mode of resistance. Screening of selected patient populations for resistance or pharmacologic intervention of those patients termed 'resistant' warrants further study.
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Affiliation(s)
- Jeremiah P Depta
- Department of Internal Medicine, Cleveland Clinic, Cleveland, Ohio, USA.
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15
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Ticagrelor: a new option for ACS. Nurse Pract 2012; 37:9-11. [PMID: 22334097 DOI: 10.1097/01.npr.0000411112.79443.04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Antiplatelet therapy in percutaneous coronary intervention: recent advances in oral antiplatelet agents. Curr Opin Cardiol 2010; 25:305-11. [DOI: 10.1097/hco.0b013e328339f1aa] [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] [Indexed: 02/06/2023]
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Adding intravenous unfractionated heparin to standard enoxaparin causes excessive anticoagulation not detected by activated clotting time: results of the STACK-on to ENOXaparin (STACKENOX) study. Am Heart J 2009; 158:177-84. [PMID: 19619692 DOI: 10.1016/j.ahj.2009.05.022] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Accepted: 05/18/2009] [Indexed: 11/20/2022]
Abstract
BACKGROUND The STACKENOX study assessed the cumulative anticoagulation effect of administering stack-on intravenous unfractionated heparin (UFH) to subjects already receiving enoxaparin. METHODS Seventy-two healthy subjects aged 40 to 60 years received subcutaneous enoxaparin (1 mg/kg every 12 hours) for 2.5 days (steady state) and were randomized to receive a 70 IU/kg intravenous UFH bolus 4, 6, or 10 hours after the final enoxaparin dose. Anticoagulation levels were assessed in subjects receiving enoxaparin alone and after the UFH bolus by monitoring activated clotting time (ACT), anti-Xa and anti-IIa activities, and thrombin generation (endogenous thrombin potential [ETP]). RESULTS After the final enoxaparin dose, ETP levels decreased by 40%; anti-Xa and anti-IIa activities increased, as expected; and ACT levels did not indicate any anticoagulation effect. Stack-on UFH at 4, 6, or 10 hours after the last enoxaparin dose significantly increased anti-Xa and anti-IIa activities (P < .0001) to well above accepted therapeutic levels and resulted in total inhibition of thrombin generation for > or =2 hours; ACT levels remained within the range commonly observed in subjects receiving UFH. CONCLUSIONS The administration of stack-on UFH to subjects already receiving recommended enoxaparin dosing may result in over-anticoagulation, and should be avoided. Activated clotting time assessment did not detect the over-anticoagulation resulting from co-administration of enoxaparin and UFH.
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Levine RL, Dixit SN, Dulli DA, Khasru MA. Aspirin "failures," clopidogrel added to aspirin, and secondary stroke prevention in veterans presenting with TIA or mild-to-moderate ischemic stroke. J Stroke Cerebrovasc Dis 2007; 12:37-43. [PMID: 17903902 DOI: 10.1053/jscd.2003.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2002] [Indexed: 11/11/2022] Open
Abstract
Our objective was to investigate whether clopidogrel added to low-dose aspirin reduced vascular events in male patients at our VA hospital who had "failed" aspirin therapy because of a mild-to-moderate stroke or a transient ischemic attack. Of 179 consecutive patients who both reported daily aspirin usage at the time of their newest ischemic event as well as were then operationally defined as aspirin "failures," 134 (group A) were treated with combined aspirin-clopidogrel, 15 (group B) underwent an early arterial procedure, 25 (group C) were anticoagulated, and 5 were not entered or continued because of either non-compliance or a refusal to participate. Study therapies were modified because of a vascular event in 4.5% of group A (one non-fatal ischemic stroke, one non-fatal myocardial infarction, and four transient ischemic attacks) and 33% of group B (one non-fatal ischemic stroke, one non-fatal myocardial infarction, and three transient ischemic attacks). No major or fatal bleeding events occurred in any of those on combined aspirin-clopidogrel therapy, with minor bleeding in 10 of 134 (7.5%) and 2 of 15 (13.3%) of group A and B patients, respectively. Patients were followed for 18 +/- 9.7 months. Combined aspirin-clopidogrel therapy appears both safe as well as effective in this single-center, observational study.
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Affiliation(s)
- Ross L Levine
- Department of Neurology, William S. Middleton Memorial Veterans Affairs Medical Center, Madison, Wisconsin, USA
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19
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Gulmez O, Yildirir A, Kaynar G, Konas D, Aydinalp A, Ertan C, Ozin B, Muderrisoglu H. Effects of persistent platelet reactivity despite aspirin therapy on cardiac troponin I and creatine kinase-MB levels after elective percutaneous coronary interventions. J Thromb Thrombolysis 2007; 25:239-46. [PMID: 17574519 DOI: 10.1007/s11239-007-0067-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2007] [Accepted: 05/29/2007] [Indexed: 10/23/2022]
Abstract
BACKGROUND Creatinine kinase-MB (CK-MB) and cardiac troponin I (cTnI) elevations are highly specific for myonecrosis after percutaneous coronary intervention (PCI). Aspirin is used to prevent thrombotic complications. Several studies have shown that some individuals exhibit a reduced or completely missing antiplatelet response to aspirin. The aim of this study is to investigate the effects of platelet reactivity despite aspirin therapy on CK-MB and cTnI levels after elective percutaneous coronary interventions despite 600 mg loading dose of clopidogrel. METHODS One hundred fourteen (mean age 61.2+/-9.3 years, 78.1% male) patients receiving 300 mg daily enteric coated aspirin for at least 7 days with documented coronary artery disease were included in the study. Platelet reactivity despite aspirin was measured by platelet function analyzer (PFA)-100 collagen/epinephrine cartridge. Blood samples for CK-MB and cTnI were obtained before and at 6, 24, and 36 h after the PCI. Persistent platelet reactivity was defined when collagen/epinephrine closure time<165 s. RESULTS A total of 87 (76.4%) patients were noted to have normal platelet reactivity (Group A), and 27 (23.6%) had persistent platelet reactivity (Group B). The elevations of CK-MB and cTnI levels were statistically significant within the groups (both P<0.001). However, there were no significant differences in the CK-MB and cTnI levels of the groups at baseline and after PCI for all studied hours. CONCLUSION Persistent platelet reactivity was not associated with increased risk of CK-MB, cTnI elevations in low-to-intermediate risk PCI patients.
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Affiliation(s)
- Oyku Gulmez
- Department of Cardiology, Baskent University Faculty of Medicine, Ankara, Turkey.
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20
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Rha SW, Kuchulakanti PK, Pakala R, Cheneau E, Pinnow E, Gebreeyesus A, Aggrey G, Pichard AD, Satler LF, Kent KM, Lindsay J, Waksman R. Addition of heparin to contrast media is associated with increased bleeding and peripheral vascular complications during percutaneous coronary intervention with bivalirudin and drug-eluting stents. ACTA ACUST UNITED AC 2005; 5:64-70. [PMID: 15464942 DOI: 10.1016/j.carrad.2004.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2004] [Revised: 06/16/2004] [Accepted: 06/16/2004] [Indexed: 10/26/2022]
Abstract
BACKGROUND Nonionic radiographic contrast media (CM) is reported to be thrombogenic while performing diagnostic or interventional procedures. To avoid thrombosis, heparin is often added to the CM. Bivalirudin, used to replace heparin during percutaneous coronary intervention (PCI), is reported to be associated with reduced bleeding complications. We aimed to evaluate the impact of adding heparin to the CM during PCI in patients (pts) who underwent sirolimus-eluting stent (SES) implantation when bivalirudin was utilized as the sole antithrombotic agent. METHODS A total of 664 pts with 756 lesions underwent standard PCI with SES for various coronary artery lesions. Pts were treated with either bivalirudin only (the bivalirudin group; 0.75 mg/kg bolus and 1.75 mg/kg/h infusion, n = 323 pts) or bivalirudin (same dose) plus low-dose heparin added to the CM (the heparin mix group; mean dose = 2101.8+/-882.5 U, n = 341 pts) during PCI. The periprocedural, in-hospital, and 30-day clinical outcomes were compared. RESULTS Baseline clinical and angiographic parameters were similar between both groups. Periprocedural, in-hospital, and 1-month clinical outcomes, including thrombotic complications, were similar between the two groups. There was no difference in the periprocedural thrombosis rate between the groups. In the heparin mix group, the overall incidence of hematoma was significantly higher (3.8% vs. 8.5%, P = .01), there was a trend toward higher rates of blood transfusion (2.6% vs. 6.6%, P = .06) and overall vascular complications (0.01% vs. 5.3%, P <.001), including pseudoaneurysm (PSA; 0.0% vs. 2.6%, P = .004), and pts who required surgical repair (0.3% vs. 1.8%, P = .07). CONCLUSIONS The routine addition of low-dose heparin to CM during contemporary PCI does not add any protection value and is associated with higher rates of bleeding and vascular complications.
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Affiliation(s)
- Seung-Woon Rha
- Division of Cardiology, Washington Hospital Center, 110 Irving Street, NW Suite 4B-1, Washington, DC 20010, USA
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21
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Cox DS, Kleiman NS, Boyle DA, Aluri J, Parchman LG, Holdbrook F, Fossler MJ. Pharmacokinetics and pharmacodynamics of argatroban in combination with a platelet glycoprotein IIB/IIIA receptor antagonist in patients undergoing percutaneous coronary intervention. J Clin Pharmacol 2004; 44:981-90. [PMID: 15317826 DOI: 10.1177/0091270004267651] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The pharmacokinetic-pharmacodynamic (PK-PD) relationship of argatroban, administered in combination with a platelet glycoprotein IIb/IIIa receptor antagonist, was characterized in patients undergoing percutaneous coronary intervention (PCI). Plasma argatroban and activated clotting times (ACTs) were assessed periprocedurally in 152 patients administered argatroban (250- or 300-microg/kg bolus, then 15-microg/kg/min infusion) in combination with abciximab or eptifibatide during PCI. The PK and PK-PD models were developed utilizing a sequential population approach in NONMEM. Population PK estimates for clearance, central volume, and peripheral volume were 22.0 L/h, 11.0 L, and 13.0 L, respectively (coefficients of variation [CVs] </= 10%). By covariate analysis, clearance increased linearly with body weight. Plasma argatroban and ACT effect were well described using a sigmoidal E(max) model. For argatroban in combination with platelet glycoprotein IIb/IIIa receptor blockade in patients undergoing PCI, population PK parameters are consistent with values reported for argatroban in healthy subjects. A predictable relationship exists between argatroban concentration and effect in this setting.
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Affiliation(s)
- Donna S Cox
- GlaxoSmithKline, Clinical Pharmacokinetics Modeling and Simulation, Clinical Pharmacology and Discovery Medicine, 709 Swedeland Road, UW 27-1013, King of Prussia, PA 19406, USA
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22
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Mendoza CE, Virani SS, Shah N, Ferreira AC, de Marchena E. Noncardiac surgery following percutaneous coronary intervention. Catheter Cardiovasc Interv 2004; 63:267-73. [PMID: 15505859 DOI: 10.1002/ccd.20191] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Patient with coronary artery disease (CAD) undergoing major noncardiac surgery (NCS) are at increased risk of serious perioperative cardiac complications. At the same time, safety of percutaneous coronary intervention (PCI) before noncardiac surgery has been questioned. This paper reviews the available literature regarding the safety of PCI before NCS. At the same time, cardiac evaluation before NCS, perioperative medical management of patients undergoing NCS, and percutaneous coronary intervention and timing of NCS is also discussed.
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Affiliation(s)
- Cesar E Mendoza
- Division of Cardiology, Jackson Memorial Hospital, University of Miami School of Medicine, Miami, Florida 33136, USA
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Chen WH, Lee PY, Ng W, Tse HF, Lau CP. Aspirin resistance is associated with a high incidence of myonecrosis after non-urgent percutaneous coronary intervention despite clopidogrel pretreatment. J Am Coll Cardiol 2004; 43:1122-6. [PMID: 15028378 DOI: 10.1016/j.jacc.2003.12.034] [Citation(s) in RCA: 373] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2003] [Revised: 11/30/2003] [Accepted: 12/09/2003] [Indexed: 12/18/2022]
Abstract
OBJECTIVES We sought to investigate the effect of aspirin resistance on the incidence of myonecrosis after non-urgent percutaneous coronary intervention (PCI) among patients pretreated with clopidogrel. BACKGROUND Oral antiplatelet therapy using aspirin and a thienopyridine is the standard of care for preventing thrombotic complications of PCI. The effect of aspirin resistance on the outcomes of patients undergoing PCI is unknown. METHODS We used the Ultegra Rapid Platelet Function Assay-ASA (Accumetrics Inc., San Diego, California) to determine aspirin responsiveness of 151 patients scheduled for non-urgent PCI. All patients received a 300-mg loading dose of clopidogrel >12 h before and a 75-mg maintenance dose in the morning of the PCI. The incidence of myonecrosis was measured by creatine kinase-myocardial band (CK-MB) and by troponin I (TnI) elevations after PCI. RESULTS A total of 29 (19.2%) patients were noted to be aspirin-resistant. There was a significantly higher incidence of female subjects in the aspirin-resistant versus aspirin-sensitive groups. The incidence of any CK-MB elevation was 51.7% in aspirin-resistant patients and 24.6% in aspirin-sensitive patients (p = 0.006). Elevation of TnI was observed in 65.5% of aspirin-resistant patients and 38.5% of aspirin-sensitive patients (p = 0.012). Multivariate analysis revealed aspirin resistance (odds ratio [OR] 2.9; 95% confidence interval [CI] 1.2 to 6.9; p = 0.015) and bifurcation lesion (OR 2.8; 95% CI 1.3 to 6.0; p = 0.007) to be independent predictors of CK-MB elevation after PCI. CONCLUSIONS Despite adequate pretreatment with clopidogrel, patients with aspirin resistance as measured by a point-of-care assay have an increased risk of myonecrosis following non-urgent PCI.
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Affiliation(s)
- Wai-Hong Chen
- Division of Cardiology, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China.
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Abstract
Care of the patient before and after percutaneous coronary interventions has changed largely because of the increased use of stents. Important patient management issues include the evaluation of chest pain after the procedure, recognition of acute vessel closure during the periprocedural period, management of the vascular access site, and prevention of contrast-induced renal dysfunction. Risk factor modification and drug therapies are important interventions for the secondary prevention of coronary events. Functional testing has a meaningful role in the evaluation of some patients after coronary intervention. It is important for the specialist in internal medicine to have a firm working knowledge of the various aspects of patient care before and after these procedures because their role in the management of these patients is increasing.
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Affiliation(s)
- Timothy A Mixon
- Department of Medicine, Scott & White Memorial Hospital and Clinic, Temple, Texas 76508, USA
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25
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Carswell CI, Plosker GL. Bivalirudin: a review of its potential place in the management of acute coronary syndromes. Drugs 2002; 62:841-70. [PMID: 11929334 DOI: 10.2165/00003495-200262050-00008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
UNLABELLED Bivalirudin, a synthetic analogue of hirudin, is a specific and reversible inhibitor of thrombin which binds directly with both fluid-phase and clot-bound thrombin. In patients with unstable angina undergoing percutaneous transluminal coronary angioplasty (PTCA), results from a large well designed study and its reanalysis (n = 4312) indicate that bivalirudin is more effective than heparin in the prevention of ischaemic complications for up to 90 days after the start of treatment. In addition, among patients undergoing PTCA for post myocardial infarction (MI) bivalirudin may be more effective than heparin in preventing ischaemic complications for up to 180 days after treatment was started. Data from dose-finding studies indicate bivalirudin has potential in the treatment of patients with unstable angina not undergoing percutaneous coronary intervention (PCI); however, well designed comparative studies are needed before firm conclusions can be made. Among patients with acute ST elevation MI, randomised trials have demonstrated bivalirudin to be significantly more effective than heparin in improving early patency in patients receiving thrombolytic therapy with streptokinase. Data from the Hirulog and Early Reperfusion/Occlusion (HERO)-1 trial (n = 412) indicate that bivalirudin recipients were significantly more likely to have Thrombin Inhibition in Myocardial Ischaemia (TIMI) grade 3 flow at 90 to 120 minutes than heparin recipients. In addition, data from the HERO-2 trial (n = 17 073) show bivalirudin was significantly more effective than heparin in reducing adjudicated 96-hour reinfarction and 30-day investigator-reported death/reinfarction than heparin. Bivalirudin was as effective as heparin in reducing 30-day mortality. Data from a meta-analysis of four randomised trials among patients undergoing PTCA or treatment for acute coronary syndromes indicate that, at after 30 to 50 days of follow-up, bivalirudin was significantly more effective than heparin in reducing the incidence of nonfatal MI and the combined endpoint of death or nonfatal MI. The most significant adverse events associated with bivalirudin are bleeding complications. In individual trials, bivalirudin was as well tolerated as heparin with, in general, a reduced incidence of bleeding complications. Additionally, bivalirudin provides a more consistent, predictable anticoagulant response. In 4312 patients with unstable angina undergoing PTCA the incidence of retroperitoneal bleeding, blood transfusion and major haemorrhage was significantly lower in bivalirudin than heparin recipients. Data from the HERO-2 trial in patients with acute MI indicate that although bivalirudin recipients had a significantly higher incidence of mild or moderate bleeding than heparin recipients, there was no difference in intracranial haemorrhage, severe bleeding or transfusions. Data from a meta-analysis among 5674 patients with ischaemic heart disease show bivalirudin recipients were at a significantly lower risk of haemorrhagic events than heparin recipients. CONCLUSIONS Bivalirudin is an effective alternative to heparin in the prevention of ischaemic complications in patients with unstable angina undergoing PTCA. In addition, the drug has shown potential in the treatment of patients with unstable angina not undergoing PCI. For patients with MI, it is clear that bivalirudin can replace heparin in the management of MI where streptokinase is used as the thrombolytic agent. Further data are required on the efficacy of bivalirudin in patients undergoing thrombolysis with newer thrombolytics.
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Tsimikas S, Beyer R, Hassankhani A. Relationship between the heparin management test and the HemoTec activated clotting time in patients undergoing percutaneous coronary intervention. J Thromb Thrombolysis 2001; 11:217-21. [PMID: 11577260 DOI: 10.1023/a:1011908803939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Point-of-care whole blood coagulation tests are critical in the management of patients who undergo percutaneous coronary intervention. The Hemochron and HemoTec devices have been traditionally used to measure the activated clotting time (ACT) in the cardiac catheterization laboratory. The heparin management test (HMT) was recently introduced into clinical practice as an alternative method to current ACT measurements that uses a different sample volume, contact activators and detection system to measure whole blood coagulation. We compared the HMT to the HemoTec ACT in 68 prospectively enrolled patients (127 blood samples) undergoing percutaneous coronary intervention. Measurements were performed 10 minutes after the initial heparin bolus and thereafter at the discretion of the attending physician. The mean HMT was 41 seconds higher (approximately 15%) than the HemoTec ACT (HMT 304+/-59 vs. ACT 263+/-52, P< 0.0001), but there was a significant correlation between the methods (r=0.77, P<0.0001). However, there was increasing disagreement between the two methods as the level of anticoagulation increased. The relationship between HMT and ACT was similar in patients in whom glycoprotein IIb/IIIa inhibitors were used. The HMT, therefore, appears to be more sensitive to heparin anticoagulation that the HemoTec ACT and correlates well with it in the range required for percutaneous coronary intervention.
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Affiliation(s)
- S Tsimikas
- Division of Cardiovascular Diseases, Department of Medicine, University of California San Diego, 9500 Gilman Drive, BSB 1080, La Jolla, CA 92093-0682, USA.
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Bittl JA. From confusion to clarity: Direct thrombin inhibitors for patients with heparin-induced thrombocytopenia. Catheter Cardiovasc Interv 2001; 52:473-5. [PMID: 11285600 DOI: 10.1002/ccd.1103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- J A Bittl
- Ocala Heart Institute, Munroe Regional Medical Center, Ocala, Florida 34474, USA
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Cavusoglu E, Sharma SK, Frishman W. Unstable angina pectoris and non-Q-wave myocardial infarction. HEART DISEASE (HAGERSTOWN, MD.) 2001; 3:116-30. [PMID: 11975780 DOI: 10.1097/00132580-200103000-00009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Unstable angina pectoris and non-Q-wave myocardial infarction are clinical syndromes that share many pathophysiologic and clinical features. In the spectrum of coronary artery disease, these syndromes lie between chronic stable angina and Q-wave myocardial infarction. Although both conditions are associated with significant morbidity and mortality, patients presenting with these syndromes can be further risk stratified into higher and lower risk based on a number of readily available clinical features and biochemical parameters. Such risk stratification can allow for more tailored treatment and better resource allocation. Although routine early coronary angiography and revascularization has not been shown to be superior to conservative management, certain high-risk patients may benefit from a more aggressive strategy. Medical therapy with the use of antiplatelet, anticoagulant, and antiischemic agents remains the cornerstone of emergent treatment for patients presenting with these syndromes. The recent demonstration of a reduction in both morbidity and mortality with the glycoprotein IIb/IIIa antagonists has further expanded the armamentarium of available agents. Following initial stabilization, risk stratification with stress testing can help identify patients with a large residual ischemic burden who may benefit from coronary angiography with revascularization if feasible.
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Affiliation(s)
- E Cavusoglu
- Department of Medicine, Division of Cardiology, Bronx VA Medical Center, New York 10468, USA
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29
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Chew DP, Bhatt DL, Lincoff AM, Moliterno DJ, Brener SJ, Wolski KE, Topol EJ. Defining the optimal activated clotting time during percutaneous coronary intervention: aggregate results from 6 randomized, controlled trials. Circulation 2001; 103:961-6. [PMID: 11181470 DOI: 10.1161/01.cir.103.7.961] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Unfractionated heparin has been the primary anticoagulant therapy for percutaneous coronary intervention for >20 years. Despite the availability of rapid "point of care" testing, little clinical data defining the optimal level of anticoagulation are available. Furthermore, recent reports have advocated the use of low-dose heparin regimens in the absence of large-scale, well-conducted studies to support this practice. METHODS AND RESULTS We pooled the data from 6 randomized, controlled trials of novel adjunctive antithrombotic regimens for percutaneous coronary interventions in which unfractionated heparin constituted the control arm. Patients were divided into 25-s intervals of activated clotting times (ACTs), from <275 s to >476 s. In a total of 5216 patients, the incidence of death, myocardial infarction, or any revascularization and major or minor bleeding at 7 days were calculated for each group and compared. An ACT in the range of 350 to 375 s provided the lowest composite ischemic event rate of 6.6%, or a 34% relative risk reduction in 7-day ischemic events compared with rates observed between 171 and 295 s by quartile analysis (P=0.001). CONCLUSIONS Contrary to recent reports, the optimal suppression of ischemic events with unfractionated heparin therapy in patients undergoing percutaneous coronary intervention demands treatment to ACT levels that are substantially higher than currently appreciated. These data define a goal for heparin dosing within coronary interventions and establish a benchmark of optimal unfractionated heparin therapy against which future trials of novel antithrombotic regimens in percutaneous interventions can be compared.
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Affiliation(s)
- D P Chew
- Department of Cardiology, Cleveland Clinic Foundation, Cleveland, Ohio, USA
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30
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Antiplatelet Medications: Physiology and Pharmacology of Platelet Glycoprotein IIb/IIIa Inhibitors. J Vasc Interv Radiol 2001. [DOI: 10.1016/s1051-0443(01)70022-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Yip HK, Chang HW, Wu CJ, Chen MC, Hang CL, Fang CY, Hsieh KY. A safe and effective regimen without heparin therapy after successful primary coronary stenting in patients with acute myocardial infarction. JAPANESE HEART JOURNAL 2000; 41:697-711. [PMID: 11232987 DOI: 10.1536/jhj.41.697] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Short-term heparin therapy has been administered routinely after primary coronary stenting. However. heparin therapy results in a significantly higher incidence of bleeding and vascular complications. A new therapeutic regimen of ticlopidine and aspirin without further heparin after coronary stenting in patients without AMI has been shown to be safe and reduce the incidence of stent thrombosis. The aim of this study was to evaluate whether a new therapeutic regimen of aspirin and ticlopidine without heparin is safe and effective in patients with acute myocardial infarction (AMI) who have undergone primary coronary stenting and have Thrombolysis in Myocardial Infarction (TIMI) grade 3 flow in the infarct-related artery. Between January 1997 and September 1999, one hundred and fifty two consecutive patients with AMI on Killip score 1 or 2 who underwent primary coronary stenting resulting in TIMI grade 3 flow were enrolled and divided into two groups: Group 1 (n = 95 patients) received aspirin, ticlopidine and further intravenous heparin infusion for 48 hours following primary coronary stenting; Group 2 (n = 57 patients) received only aspirin and ticlopidine without further heparin therapy following primary coronary stenting. No in-hospital major cardiac events were observed in either group. However, the combined incidence of bleeding and vascular complications (27.4% vs 12.3%, p = 0.029) and the need for blood transfusions (9.5% vs 0%, p = 0.013) were significantly higher in Group I patients. Furthermore, hospital stay was also longer in Group I patients (5.8+/-2.4 vs 4.7+/-1.7 days, p = 0.0003). At the 30-day follow-up, there were no differences (1.05% vs 0%, p = 0.63) in the combined incidence of vascular complications and the major cardiac events were similar (1.05% vs 1.75%, p = 0.71) between the groups. The results suggest that further heparin therapy following primary coronary stenting increases the combined incidence of bleeding and vascular complications as well as the need for blood transfusions and prolongs the length of hospital stay without further benefit to those patients with coronary flow restored to TIMI 3 grade flow.
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Affiliation(s)
- H K Yip
- Division of Cardiology, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Kaohsiung Hsien, Taiwan, ROC
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Velianou JL, Strauss BH, Kreatsoulas C, Pericak D, Natarajan MK. Evaluation of the role of abciximab (Reopro) as a rescue agent during percutaneous coronary interventions: in-hospital and six-month outcomes. Catheter Cardiovasc Interv 2000; 51:138-44. [PMID: 11025564 DOI: 10.1002/1522-726x(200010)51:2<138::aid-ccd2>3.0.co;2-u] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Abciximab is effective for the prevention of complications when administered prior to percutaneous coronary intervention (PCI). The efficacy and safety of abciximab as an unplanned or rescue agent for complications of PCI is unknown. Rescue versus planned use was compared in 186 consecutive patients. Primary or rescue PCI for acute myocardial infarction (MI) and shock were excluded. Rescue abciximab use was undertaken in 101 patients (54.3%) and planned abciximab was used in 85 (45.7%). The rescue abciximab patients had a lower incidence of previous MI, preprocedural thrombus, multivessel, and vein graft intervention. In-hospital endpoints in the rescue versus planned abciximab patients were death (1.0% vs. 1. 2%, P = 1.0), Q-wave MI (2.0% vs. 2.4%, P = 1.0), any MI (14.9% vs. 9.4%, P = 0.3), target vessel revascularization (TVR; 0% vs. 1.2%, P = 1.0), and composite (15.8% vs. 10.6%, P = 0.3). At 6 months, events were death (4.0% vs. 2.3%, P = 0.69), MI (14.9% vs. 9.4%, P = 0.26), TVR (20.8% vs. 4.7%, P = 0.001), and composite (30.7% vs. 15. 3%, P = 0.01). In-hospital complications between the rescue and planned abciximab patients of major bleed (1.0% vs. 1.8%, P = NS), stroke (0% vs. 1.8%, P = NS), and thrombocytopenia (3.0% vs. 1.8%, P = NS) were similar. There was a significantly higher procedural time (99.6 min vs. 86.1 min, P = 0.02), contrast volume (278.8 ml vs. 223. 5 ml, P = 0.04), and heparin use (8984 u vs. 6003 u, P = 0.0006) in the rescue group. In this nonrandomized comparison, rescue abciximab allowed for the safe discharge from hospital in the majority of patients. However, during a 6-month follow-up, more patients treated with rescue abciximab required TVR with either repeat PCI or CABG. Further studies are warranted to evaluate the overall strategy of rescue abciximab use in PCI.
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Affiliation(s)
- J L Velianou
- Division of Cardiology, Department of Medicine, Preventative Cardiology and Therapeutics Hamilton Health Sciences Corp., General Campus McMaster University, Hamilton, Ontario, Canada
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Antithrombotic Therapy in Non???ST-Segment Elevation Acute Coronary Syndromes. Clin Drug Investig 2000. [DOI: 10.2165/00044011-200019060-00003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Verstraete M, Prentice CR, Samama M, Verhaeghe R. A European view on the North American fifth consensus on antithrombotic therapy. Chest 2000; 117:1755-70. [PMID: 10858413 DOI: 10.1378/chest.117.6.1755] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
An American-Canadian group of experts have, in the November 1998 issue of CHEST, published for the fifth time their recommendations for antithrombotic therapy. This remarkable consensus document was the result of an extensive review of the literature by an interdisciplinary group. Considering the impact of this document on medical practice, also outside North America, a group of European experts reviewed in detail the fifth report, particularly the sections on clinical indications of antithrombotic treatment. The aim was not to indicate the many areas of agreement and to quote literature that has become available since publication of the last consensus documents, but rather to refer to the gray zones of uncertainty and limited number of divergent opinions.
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Affiliation(s)
- M Verstraete
- Center for Molecular and Vascular Biology, Katholieke Universiteit Leuven, Belgium
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35
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Hughes RL. Supplement to the AHA Guidelines for the Management of Transient Ischemic Attacks. Stroke 2000. [DOI: 10.1161/01.str.31.4.983-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kałuza GL, Joseph J, Lee JR, Raizner ME, Raizner AE. Catastrophic outcomes of noncardiac surgery soon after coronary stenting. J Am Coll Cardiol 2000; 35:1288-94. [PMID: 10758971 DOI: 10.1016/s0735-1097(00)00521-0] [Citation(s) in RCA: 561] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
OBJECTIVES To assess the clinical course of patients who have undergone coronary stent placement less than six weeks before noncardiac surgery. BACKGROUND Surgical and percutaneous transluminal coronary angioplasty revascularization performed before high-risk noncardiac surgery is expected to reduce perioperative cardiac morbidity and mortality. Perioperative and postoperative complications in patients who have undergone coronary stenting before a noncardiac surgery have not been studied. METHODS Forty patients who underwent coronary stent placement less than six weeks before noncardiac surgery requiring a general anesthesia were included in the study (1-39 days, average: 13 days). The records were screened for the occurrence of adverse clinical events, including myocardial infarction, stent thrombosis, peri- and postoperative bleeding and death. RESULTS In 40 consecutive patients meeting the study criteria, there were seven myocardial infarctions (MIs), 11 major bleeding episodes and eight deaths. All deaths and MIs, as well as 8/11 bleeding episodes, occurred in patients subjected to surgery fewer than 14 days from stenting. Four patients expired after undergoing surgery one day after stenting. Based on electrocardiogram, enzymatic and angiographic evidence, stent thrombosis accounted for most of the fatal events. The time between stenting and surgery appeared to be the main determinant of outcome. CONCLUSIONS Postponing elective noncardiac surgery for two to four weeks after coronary stenting should permit completion of the mandatory antiplatelet regimen, thereby reducing the risk of stent thrombosis and bleeding complications.
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Affiliation(s)
- G L Kałuza
- Methodist Hospital, Baylor College of Medicine, Houston, Texas 77030, USA
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37
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Abstract
New strategies for profound inhibition of platelet activity at the injured coronary plaque focus on blockade of the platelet surface membrane glycoprotein IIb/IIIa receptor, which binds circulating fibrinogen or von Willebrand factor and crosslinks platelets as the final common pathway to platelet aggregation. Intravenous agents directed against this receptor include the chimeric monoclonal antibody fragment abciximab, the peptide inhibitor eptifibatide and nonpeptide mimetics tirofiban and lamifiban. Over 33,000 patients have been evaluated in 11 large-scale, placebo-controlled trials of these agents. During percutaneous coronary intervention, an absolute reduction of 1.5% to 6.5% in the 30-day risk of death, myocardial infarction or repeat urgent revascularization has been observed, with some variability in treatment effect among the agents tested (abciximab, eptifibatide and tirofiban). Treatment effect is achieved early with every modality of revascularization and is maintained over the long-term (up to three years). Increased bleeding risk may be minimized by reduction and weight-adjustment of concomitant heparin dosing. In the acute coronary syndromes without ST segment elevation, absolute 1.5% to 3.2% reductions in 30-day rates of death or myocardial (re-) infarction have been achieved with two to four day courses of eptifibatide or tirofiban. Clinical benefit accrues during the period of drug infusion and is durable. Treatment effect may be enhanced among patients undergoing early coronary revascularization, with evidence of stabilization before intervention and suppression of postprocedural ischemic events. Thus, blockade of the platelet glycoprotein IIb/IIIa receptor reduces ischemic complications when used as an adjunct to percutaneous coronary intervention or the management of acute ischemic syndromes.
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Affiliation(s)
- A M Lincoff
- Department of Cardiology, The Cleveland Clinic Foundation, Ohio 44195, USA
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Abstract
Although unfractionated heparin is widely used in the treatment of acute coronary syndromes, it has several pharmacokinetic, biophysical, and biological limitations. The practical advantages and success of low-molecular-weight heparin administered subcutaneously without laboratory monitoring for the treatment of venous thromboembolism have prompted a number of randomized studies investigating the efficacy and safety of these agents in patients with acute coronary syndromes. This article will review the limitations of unfractionated heparin and the mechanisms by which low-molecular-weight heparin overcomes these limitations, as well as the results of recent trials involving low-molecular-weight heparin in the management of patients with acute coronary syndromes.
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Affiliation(s)
- J Hirsh
- Hamilton Civic Hospitals Research Centre and McMaster University, Ontario, Canada
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39
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