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Journal of Cardiology and Clinical Research

Therapy of Peripheral Arterial Disease

Editorial | Open Access | Volume 1 | Issue 1

  • 1. Department of Medicine, Divisions of Cardiology, Pulmonary Medicine/Critical Care, and Geriatrics, New York Medical College, Valhalla, NY, USA
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Corresponding Authors
Wilbert S. Aronow, MD, FACC, FAHA, Cardiology Division, New York Medical College, Macy Pavilion, Room 138, Valhalla
Citation

Aronow WS (2013) Therapy of Peripheral Arterial Disease. J Cardiol Clin Res 1: 1001

INTRODUCTION

PAD is chronic arterial occlusive disease of the lower extremities caused by atherosclerosis. Significant independent risk factors for PAD in 467 men, mean age 80 years, and in 1,444 women, mean age 81 years, living in the community and seen in an academic geriatrics paractice were age (odds ratio = 1.05 for each 1-year increase in age in men and 1.03 for each 1-year increase in age in women); current cigarette smoking (odds ratio = 2.6 for men and 4.6 for women); systolic or diastolic hypertension (odds ratio = 2.2 for men and 2.8 for women); diabetes mellitus (odds ratio = 6.1 for men and 3.6 for women); serum highdensity lipoprotein cholesterol (odds ratio = 0.95 for each 1 mg/ dl increase in men and 0.97 for each 1 mg/dl increase in women); and serum low-density lipoprotein (LDL) cholesterol (odds ratio = 1.02 for each 1 mg/dl increase in men and in women) [1]. PAD coexists with other atherosclerotic disorders [2,3]. Patients with PAD are at increased risk for all-cause mortality, cardiovascular mortality, and cardiovascular events [4-6].

Smoking cessation programs should be strongly encouraged at each visit in patients with PAD [7]. Hypertension should be treated to reduce cardiovascular mortality and morbidity in patients with PAD with the blood pressure lowered to less than 140/90 mm Hg [7,8]. The hemoglobin A1c level should be lowered to less than 7.0% [7]. The serum low-density lipoprotein cholesterol level should be reduced to less than 70 mg/dl by treatment with statins to reduce cardiovascular events and mortality [7,9-11] and to increase exercise time in patients with intermittent claudication [12-14]

The antiplatelet drugs aspirin or clopidogrel should be given to patients with PAD to lower the incidence of cardiovascular death, myocardial infarction and stroke [7,15]. At 1.9-year follow-up in the Clopidogrel versus Aspirin in Patients at Risk for Ischaemic Events (CAPRIE) trial, the annual incidence of vascular death, nonfatal myocardial infarction, and nonfatal stroke was 3.7% in persons randomized to clopidogrel versus 4.9% in persons randomized to aspirin, a 24% significant reduction with the use of clopidogrel [16].

Tthe Heart Outcomes Prevention Evaluation (HOPE) Study found that ramipril 10 mg daily lowered cardiovascular events in patients with symptomatic PAD and in patients with asymptomatic PAD [17]. The American College of Cardiology (ACC)/American Heart Association (AHA) guidelines recommend treating patients with PAD with angiotensin-converting enzyme inhibitors unless there are contraindications to these drugs to lower cardiovascular mortality and morbidity [7] Beta blockers should also be used to treat coronary artery disease in patients with PAD unless there are contraindications to these drugs to lower cardiovascular events and mortality [7,18].

Two drugs, pentoxifylline and cilostazol, have been approved by the United States Food and Drug Administration for symptomatic treatment of intermittent claudication. However, studies have found no consistent improvement with pentoxifylline in patients with intermittent claudication in comparison with placebo [19]. Cilostazol has been found in numerous studies to improve exercise capacity in patients with intermittent claudication, and in a dose of 100 mg twice daily, was shown to be superior to both placebo and pentoxifylline [20]. Cilostazol should be given to patients with PAD and intermittent claudication to increase walking distance but should not be given to patients who also have heart failure. Other contraindications to use of cilostazol include a creatinine clearance <25 ml/min, a known predisposition for bleeding, or coadministration of CYP3A4 or CYP2C19 inhibitors such as cimetidine, diltiazem, erythromycin, ketoconazole, lansoprazole, omeprazole, and HIV1 protease inhibitors.

Exercise rehabilitation programs have been found to increase walking distance in patients with intermittent claudication through improvements in peripheral circulation, walking economy, and cardiopulmonary function [21]. The optimal exercise program for improving claudication pain distance in patients with PAD uses intermittent walking to near-maximal pain during a program of at least 6 months [22]. The ACC/ AHA guidelines recommend a supervised exercise program for patients who have intermittent claudication [7].

Iindications for lower extremity percutaneous transluminal angioplasty or bypass surgery are 1) incapacitating claudication in patients interfering with work or lifestyle; 2) limb salvage in patients with limb-threatening ischemia as manifested by rest pain, nonhealing ulcers, and/or infection or gangrene; and 3) vasculogenic impotence [23]

Nonrandomized studies have found that both immediate and long-term survival are higher in patients having revascularization rather than amputation for limb-threatening ischemia [24]. However, amputation of lower extremities should be performed if tissue loss has progressed beyond the point of salvage, if surgery is too risky, if life expectancy is very low, or if functional limitations reduce the benefit of limb salvage [25].

 

REFERENCES

1. Ness J, Aronow WS, Ahn C. Risk factors for symptomatic peripheral arterial disease in older persons in an academic hospital-based geriatrics practice. J Am Geriatr Soc. 2000; 48: 312-4.

2. Aronow WS, Ahn C. Prevalence of coexistence of coronary artery disease, peripheral arterial disease, and atherothrombotic brain infarction in men and women > or = 62 years of age. Am J Cardiol. 1994; 74: 64-5.

3. Ness J, Aronow WS. Prevalence of coexistence of coronary artery disease, ischemic stroke, and peripheral arterial disease in older persons, mean age 80 years, in an academic hospital-based geriatrics practice. J Am Geriatr Soc. 1999; 47: 1255-6.

4. Criqui MH, McClelland RL, McDermott MM, Allison MA, Blumenthal RS, Aboyans V, et al. The ankle-brachial index and incident cardiovascular events in the MESA (Multi-Ethnic Study of Atherosclerosis). J Am Coll Cardiol. 2010; 56: 1506-12.

5. Aronow WS, Ahmed MI, Ekundayo OJ, Allman RM, Ahmed A. A propensity-matched study of the association of peripheral arterial disease with cardiovascular outcomes in community-dwelling older adults. Am J Cardiol. 2009; 103: 130-5.

6. Chhabra A, Aronow WS, Ahn C, Duncan K, Patel JD, Papolos AI, et al. Incidence of new cardiovascular events in patients with and without peripheral arterial disease seen in a vascular surgery clinic. Med Sci Monit. 2012; 18: CR131-4.

7. Hirsch AT, Haskal ZJ, Hertzer NR, Bakal CW, Creager MA, Halperin JL, et al. ACC/AHA 2005 Practice Guidelines for the management of patients with peripheral arterial disease (lower extremity, renal, mesenteric, and abdominal aortic): Executive Summary. Circulation. 2006; 113: e463-654.

8. Aronow WS, Fleg JL, Pepine CJ, Artinian NT, Bakris G, Brown AS, et al. ACCF/AHA 2011 Expert Consensus Document on Hypertension in the Elderly. A Report of the American College of Cardiology Foundation Task Force on Clinical Expert Consensus Documents. Developed in collaboration with the American Academy of Neurology, American Geriatrics Society, American Society for Preventive Cardiology, American Society for Hypertension, American Society of Nephrology, Association of Black Cardiologists, and European Society of Hypertension. J Am Coll Cardiol. 2011; 57: 2037-2114.

9. Grundy SM, Cleeman JI, Merz CN, Brewer HB Jr, Clark LT, Hunninghake DB, et al. Implications of recent clinical trials for the National Cholesterol Education Program Adult Treatment Panel III guidelines. Circulation. 2004; 110: 227-39.

10. Heart Protection Study Collaborative Group. MRC/BHF Heart Protection Study of cholesterol lowering with simvastatin in 20,536 high-risk individuals: a randomised placebo-controlled trial. Lancet. 2002; 360: 7-22.

11. Aronow WS, Ahn C. Frequency of new coronary events in older persons with peripheral arterial disease and serum low-density lipoprotein cholesterol > or = 125 mg/dl treated with statins versus no lipid-lowering drug. Am J Cardiol. 2002; 90:789-791.

12. Aronow WS, Nayak D, Woodworth S, Ahn C. Effect of simvastatin versus placebo on treadmill exercise time until the onset of intermittent claudication in older patients with peripheral arterial disease at six months and at one year after treatment. Am J Cardiol. 2003; 92: 711-2.

13. Mohler ER III, Hiatt WR, Creager MA. Cholesterol reduction with atorvastatin improves walking distance in patients with peripheral arterial disease. Circulation. 2003; 108:1481-86.

14. Mondillo S, Ballo P, Barbati R, Guerrini F, Ammaturo T, Agricola E, et al. Effects of simvastatin on walking performance and symptoms of intermittent claudication in hypercholesterolemic patients with peripheral vascular disease. Am J Med 2003; 114: 359-64.

15. Antithrombotic Trialists’ Collaboration. Collaborative meta-analysis of randomised trials of antiplatelet therapy for prevention of death, myocardial infarction, and stroke in high risk patients. BMJ. 2002; 324: 71-86.

16. CAPRIE Steering Committee. A randomised, blinded, trial of clopidogrel versus aspirin in patients at risk of ischaemic events (CAPRIE). CAPRIE Steering Committee. Lancet. 1996; 348: 1329-39.

17. Ostergren J, Sleight P, Dagenais G, Danisa K, Bosch J, Qilong Y, et al. Impact of ramipril in patients with evidence of clinical or subclinical peripheral arterial disease. Eur Heart J. 2004; 25: 17-24.

18. Aronow WS, Ahn C. Effect of beta blockers on incidence of new coronary events in older persons with prior myocardial infarction and symptomatic peripheral arterial disease. Am J Cardiol. 2001; 87: 1284-6.

19. Porter JM, Cutler BS, Lee BY, Reich T, Reichle FA, Scogin JT, et al.. Pentoxifylline efficacy in the treatment of intermittent claudication: multicenter controlled double-blind trial with objective assessment of chronic occlusive arterial disease patients. Am Heart J. 1982; 104: 66- 72.

20. Dawson DL, Cutler BS, Hiatt WR, Hobson RW 2nd, Martin JD, Bortey EB, et al.. A comparison of cilostazol and pentoxifylline for treating intermittent claudication. Am J Med. 2000; 109: 523-30.

21. Hamburg NM, Balady GJ. Exercise rehabilitation in peripheral artery disease: functional impact and mechanisms of benefits. Circulation. 2011; 123: 87-97.

22. Gardner AW, Poehlman ET. Exercise rehabilitation programs for the treatment of claudication pain. A meta-analysis. JAMA. 1995; 274: 975-80.

23. Weitz JI, Byrne J, Clagett GP, Farkouh ME, Porter JM, Sackett DL, et al. Diagnosis and treatment of chronic arterial insufficiency of the lower extremities: a critical review. Circulation. 1996; 94: 3026-49.

24. Ouriel K, Fiore WM, Geary JE. Limb-threatening ischemia in the medically compromised patient: amputation or revascularization? Surgery. 1988; 104: 667-72.

25. Fujitani RM, Gordon IL, Perera GB, Wilson SE. Peripheral vascular disease in the elderly. In: Aronow WS, Fleg JL. Cardiovascular Disease in the Elderly Patient (3rd edn) 2003; Marcel Dekker, Inc, New York City: 707-63.

Aronow WS (2013) Therapy of Peripheral Arterial Disease. J Cardiol Clin Res 1: 1001

Received : 14 Jun 2013
Accepted : 17 Jun 2013
Published : 19 Jun 2013
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