* Occlusive Disease Antithrombotic Therapy for Peripheral Artery
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Antithrombotic Therapy for Peripheral Artery Occlusive Disease * Michael Sobel and Raymond Verhaeghe Chest 2008;133;815S-843S DOI 10.1378/chest.08-0686 The online version of this article, along with updated information and services can be found online on the World Wide Web at: http://www.chestjournal.org/content/133/6_suppl/815S.full.ht ml CHEST is the official journal of the American College of Chest Physicians. It has been published monthly since 1935. Copyright 2007 by the American College of Chest Physicians, 3300 Dundee Road, Northbrook IL 60062. All rights reserved. No part of this article or PDF may be reproduced or distributed without the prior written permission of the copyright holder. (http://www.chestjournal.org/site/misc/reprints.xhtml) ISSN:0012-3692 Downloaded from www.chestjournal.org at Stanford Health Services on July 17, 2009 Copyright © 2008 American College of Chest Physicians Supplement ANTITHROMBOTIC AND THROMBOLYTIC THERAPY 8TH ED: ACCP GUIDELINES Antithrombotic Therapy for Peripheral Artery Occlusive Disease* American College of Chest Physicians Evidence- Based Clinical Practice Guidelines (8th Edition) Michael Sobel, MD; and Raymond Verhaeghe, MD This chapter is devoted to antithrombotic therapy for peripheral artery occlusive disease as part of the American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (8th Edition). Grade 1 recommendations are strong and indicate that the benefits do, or do not, outweigh risks, burden, and costs. Grade 2 suggests that individual patients’ values may lead to different choices (for a full understanding of the grading see the “Grades of Recommendation” chapter by Guyatt et al, CHEST 2008; 133:123S–131S). Among the key recommendations in this chapter are the following: We recommend lifelong antiplatelet therapy in comparison to no antiplatelet therapy in pulmonary artery disease (PAD) patients with clinically manifest coronary or cerebrovascular disease (Grade 1A), and also in those without clinically manifest coronary or cerebrovascular disease (Grade 1B). In patients with PAD and intermittent claudication, we recommend against the use of anticoagulants (Grade 1A). For patients with moderate to severe disabling intermittent claudication who do not respond to exercise therapy, and who are not candidates for surgical or catheter-based intervention, we recommend cilostazol (Grade 1A). We suggest that clinicians not use cilostazol in those with less-disabling claudication (Grade 2A). In patients with short-term (< 14 days) arterial thrombosis or embolism, we suggest intraarterial thrombolytic therapy (Grade 2B), provided they are at low risk of myonecrosis and ischemic nerve damage developing during the time to achieve revascularization. For patients undergoing major vascular reconstructive procedures, we recommend IV unfractionated heparin (UFH) prior to the application of vascular cross clamps (Grade 1A). For all patients undergoing infrainguinal arterial reconstruction, we recommend aspirin (75–100 mg, begun preop- eratively) [Grade 1A]. For routine autogenous vein infrainguinal bypass, we recommend aspirin (75–100 mg, begun preoperatively) [Grade 1A]. For routine prosthetic infrainguinal bypass, we recommend aspirin (75–100 mg, begun preoperatively) [Grade 1A]. In patients undergoing carotid endarterectomy, we recommend that aspirin, 75–100 mg, be administered preoperatively and continued indefinitely (75–100 mg/d) [Grade 1A]. In nonoperative patients with asymptomatic carotid stenosis (primary or recurrent), we suggest that dual antiplatelet therapy with aspirin and clopidogrel be avoided (Grade 1B). For all patients undergoing lower-extremity balloon angioplasty (with or without stenting), we recommend long-term aspirin, 75–100 mg/d (Grade 1C). (CHEST 2008; 133:815S–843S) Key words: anticoagulation; antiplatelet therapy; aspirin; atherosclerosis; carotid artery; heparin; intermittent claudication; peripheral vascular disease; randomized controlled trial; review; thrombolysis; vascular surgery Abbreviations: ACD ϭ absolute claudication distance; CAD ϭ coronary artery disease; CI ϭ confidence interval; COM ϭ Claudication Outcome Measures; INR ϭ international normalized ratio; LMWH ϭ low-molecular-weight heparin; MI ϭ myocardial infarction; PAD ϭ peripheral arterial disease; PTFE ϭ polytetrafluoroethylene; QOL ϭ quality of life; RCT ϭ randomized controlled trial; SF-36 ϭ Short Form-36; STILE ϭ Surgery vs Thrombolysis for Ischemia of the Lower Extremity; TIA ϭ transient ischemic attack; UFH ϭ unfractionated heparin; VKA ϭ vitamin K antagonist; WIQ ϭ Walking Impairment Questionnaire www.chestjournal.org CHEST / 133/6/JUNE, 2008 SUPPLEMENT 815S Downloaded from www.chestjournal.org at Stanford Health Services on July 17, 2009 Copyright © 2008 American College of Chest Physicians vided patients are at low risk of myonecrosis Summary of Recommendations and ischemic nerve damage developing during 1.0 Chronic Limb Ischemia and Intermittent the time to achieve revascularization by this Claudication method. Values and preferences: This recommendation places 1.1.1.1. In PAD patients with clinically manifest relatively little value on small reductions in the need coronary or cerebrovascular disease, we recom- for surgical intervention and relatively high value on mend lifelong antiplatelet therapy in compari- avoiding large expenditures and possible major hem- son to no antiplatelet therapy (Grade 1A). orrhagic complications. 1.1.1.2. In those without clinically manifest cor- 3.1. For patients undergoing major vascular onary or cerebrovascular disease, we suggest reconstructive procedures, we recommend IV aspirin (75–100 mg/d) over clopidogrel (Grade UFH, prior to the application of vascular cross 2B). In patients who are aspirin intolerant, clamps (Grade 1A). we recommend clopidogrel over ticlopidine 3.2. For all patients undergoing infrainguinal (Grade 1B). arterial reconstruction, we recommend aspirin Values and preferences: This recommendation (75–100 mg, begun preoperatively) [Grade 1A]. places a relatively high value on avoiding large We recommend against the routine use of peri- expenditures to achieve uncertain, small reductions in operative dextran, heparin, or long-term anti- vascular events. coagulation with VKAs for all extremity recon- 1.1.2. In patients with PAD and intermittent claudi- structions (Grade 1B). cation, we recommend against the use of anticoagu- 3.3. For patients receiving routine autogenous lants to prevent vascular mortality or cardiovascular vein infrainguinal bypass, we recommend aspi- events (Grade 1A). rin (75–100 mg, begun preoperatively) [Grade 1.1.4. For patients with moderate-to-severe dis- 1A]. We suggest that VKAs not be used routinely abling intermittent claudication who do not in patients undergoing infrainguinal vein by- respond to exercise therapy, and who are not pass (Grade 2B). For those at high risk of bypass candidates for surgical or catheter-based inter- occlusion and limb loss, we suggest VKAs plus vention, we recommend cilostazol (Grade 1A). aspirin (Grade 2B). We suggest that clinicians not use cilostazol in Values and preferences: These recommendations those with less-disabling claudication (Grade place relatively little value on small increases in 2A). We recommend against the use of pentoxi- long-term patency that may be statistically uncertain, fylline (Grade 2B). and a relatively high value on avoiding hemorrhagic Values and preferences: Because of the cost of complications. cilostazol therapy, and the safety and efficacy of an 3.4. For patients receiving routine prosthetic exercise program, we recommend cilostazol treat- infrainguinal bypass, we recommend aspirin ment be reserved for patients with moderate to (75–100 mg, begun preoperatively) [Grade 1A]. severe claudication who have tried and failed an We suggest that VKAs not be used routinely in exercise program and are not candidates for vascular patients undergoing prosthetic infrainguinal surgical or endovascular procedures. bypass (Grade 2A). 1.1.5. For patients with intermittent claudica- Values and preferences: These recommendations tion, we recommend against the use of antico- place relatively little value on small increases in agulants (Grade 1A). long-term patency that may be statistically uncertain, 1.1.6. For patients with limb ischemia, we sug- and a relatively high value on avoiding hemorrhagic gest clinicians do not use prostaglandins (Grade complications. 2B). 4.0. In patients undergoing carotid endarterec- 2.1. In patients who suffer from acute arterial tomy, we recommend that aspirin, 75–100 mg, emboli or thrombosis, we recommend immedi- be given preoperatively to prevent periopera- ate systemic anticoagulation with UFH, over no tive ischemic neurologic events. We recom- anticoagulation (Grade 1C). In patients under- mend lifelong postoperative aspirin (75–100 going embolectomy we suggest following sys- mg/d) [Grade 1A]. temic anticoagulation with UFH with long-term 5.0. In nonoperative patients with asymptom- anticoagulation with vitamin K antagonists atic carotid stenosis (primary or recurrent), we (VKA) (Grade 2C). recommend lifelong aspirin, 75–100 mg/d 2.2. In patients with short-term (< 14 days) (Grade 1C). In this patient group, we recom- thrombotic or embolic disease, we suggest in- mend against dual antiplatelet therapy with traarterial thrombolytic therapy (Grade 2B) pro- aspirin and clopidogrel (Grade 1B). 816S Antithrombotic and Thrombolytic Therapy 8th Ed: ACCP Guidelines Downloaded from www.chestjournal.org