Vascular disease: Difference between revisions

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imported>Robert Badgett
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===Aspirin===
===Aspirin===
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|+ USPSTF: Risk level at which benefit exceeds harm.<ref name="pmid19293072">{{cite journal |author= |title=Aspirin for the prevention of cardiovascular disease: U.S. Preventive Services Task Force recommendation statement |journal=Ann. Intern. Med. |volume=150 |issue=6 |pages=396–404 |year=2009 |month=March |pmid=19293072 |doi= |url=http://www.annals.org/cgi/pmidlookup?view=long&pmid=19293072 |issn=}}</ref><ref name="pmid19293073">{{cite journal |author=Wolff T, Miller T, Ko S |title=Aspirin for the primary prevention of cardiovascular events: an update of the evidence for the U.S. Preventive Services Task Force |journal=Ann. Intern. Med. |volume=150 |issue=6 |pages=405–10 |year=2009 |month=March |pmid=19293073 |doi= |url=http://www.annals.org/cgi/content/full/150/6/405 |issn=}}</ref>
|+ USPSTF: Risk level at which benefit exceeds harm.<ref name="pmid19293072">{{cite journal |author=U.S. Preventive Services Task Force |title=Aspirin for the prevention of cardiovascular disease: U.S. Preventive Services Task Force recommendation statement |journal=Ann. Intern. Med. |volume=150 |issue=6 |pages=396–404 |year=2009 |month=March |pmid=19293072 |doi= |url=http://www.annals.org/cgi/pmidlookup?view=long&pmid=19293072 |issn=}}</ref><ref name="pmid19293073">{{cite journal |author=Wolff T, Miller T, Ko S |title=Aspirin for the primary prevention of cardiovascular events: an update of the evidence for the U.S. Preventive Services Task Force |journal=Ann. Intern. Med. |volume=150 |issue=6 |pages=405–10 |year=2009 |month=March |pmid=19293073 |doi= |url=http://www.annals.org/cgi/content/full/150/6/405 |issn=}}</ref>
! colspan="2"|Men!! colspan="2"|Women
! colspan="2"|Men!! colspan="2"|Women
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In medicine, vascular disease is "pathological processes involving any of the blood vessels in the cardiac or peripheral circulation. They include diseases of arteries; veins; and rest of the vasculature system in the body."[1] Examples of vascular diseases include coronary heart disease, cerebrovascular disorders, and peripheral vascular disease.

Prevention

Exercise

Separate to the question of the benefits of exercise; it is unclear whether doctors should spend time counseling patients to exercise. The U.S. Preventive Services Task Force (USPSTF), based on a systematic review of randomized controlled trials, found 'insufficient evidence' to recommend that doctors counsel patients on exercise.[2] However, the American Heart Association, based on a non-systematic review, recommends that doctors counsel patients on exercise [3]

Preventive diets

Dietary changes can potentially lead to large changes in the cholesterol.[4]

Aspirin

USPSTF: Risk level at which benefit exceeds harm.[5][6]
Men Women
Age 10 year CHD risk Age 10 year stroke risk
45-59 years ≥ 4% 50-59 years ≥ 3%
60-69 years ≥ 9% 60-69 years ≥ 8%
70-79 years ≥ 12% 70-79 years ≥ 11%
calculator Stroke calculator
  • If on NSAID: multiple rates by 4
  • If prior PUD: multiply rates by 2 to 3

Aspirin, in doses of less than 75 to 81 mg/d[7], can reduce the incidence of cardiovascular events.[8] In most cases the net benefit is less than 1 patient among 100.[6] A more recent meta-analysis suggests the benefit is not clear, especially for patients on statins.[9] An accompanying editorial[10], offers a cost-benefit anaysis that recommends aspirin if the 10 year risk of vascular disease is at least 30%.[10]

Anticholesteremic agents

For more information, see: Anticholesteremic agent.

The U.S. Preventive Services Task Force (USPSTF) estimated that after 5 to 7 years of treatment with statins, the relative risk reduction of coronary heart disease events is decreased by approximately 30%[11][12]. More recently, a meta-analysis reported an almost identical relative risk reduction of 29.2% in low risk patients treated for 4.3 years [13]. A relative risk reduction of 19% in coronary mortality was found in a meta-analysis of patients at all levels of risk.[14]

Various clinical practice guidelines have addressed the treatment of hypercholesterolemia. The American College of Physicians has addressed hypercholesterolemia in patients with diabetes [15]. Their recommendations are:

  • Recommendation 1: Lipid-lowering therapy should be used for secondary prevention of cardiovascular mortality and morbidity for all patients (both men and women) with known coronary artery disease and type 2 diabetes.
  • Recommendation 2: Statins should be used for primary prevention against macrovascular complications in patients (both men and women) with type 2 diabetes and other cardiovascular risk factors.
  • Recommendation 3: Once lipid-lowering therapy is initiated, patients with type 2 diabetes mellitus should be taking at least moderate doses of a statin (the accompanying evidence report states "simvastatin, 40 mg/d; pravastatin, 40 mg/d; lovastatin, 40 mg/d; atorvastatin, 20 mg/d; or an equivalent dose of another statin")[16].
  • Recommendation 4: For those patients with type 2 diabetes who are taking statins, routine monitoring of liver function tests or muscle enzymes is not recommended except in specific circumstances.

The National Cholesterol Education Program revised their guidelines[17]; however, their 2004 revisions have been criticized for use of nonrandomized, observational data.[18]

Antioxidant vitamins

For more information, see: Antioxidant.

Antioxidant vitamins are not beneficial.

Omega-3 fatty acids (fish oil)

For more information, see: Fish oil.


Omega-3 fatty acids may have small benefit[19][20], but results of randomized controlled trials are not consistent. The benefit may be at conferred on 2% of patients who take omega-3 fatty acids.[19]

Homocysteine lowering

Lowering of homocystein blood concentration with folic acid, vitamin B12, and vitamin B6 is not beneficial.

A meta-analysis concluded that lowering homocysteine with folic acid and other supplements may reduce stroke.[21] However, the two largest randomized controlled trials included in the meta-analysis had conflicting results. Lonn reported positive results[22]; whereas the trial by Toole was negative.[23]

Since the meta-analysis, two additional randomized controlled trials have shown no reduction in cardiovascular endpoint despite successfully lowering the plasma homocysteine level.[24][25]

Evidence table

Interventions to prevent all-cause mortality
among patients at risk of vascular disease
  Study type Relative risk ratio or odds ratio
for all-cause mortality
Aspirin[8] Systematic review of 6 RCTs through 2005
(Does not include negative JPAD trial[26])		 Men OR=0.93
Women OR=0.94
Statin[13] Systematic review of 7 RCTs through 2005
(Does not include positive Jupiter[27] or negative GISSI-HF[28] trials)		 RR=0.92
Fish oil[29] Systematic review of 12 RCTs through 2006
(Does not include positive GISSI-HF[20])		 OR=0.92
No systematic review reported a significant decrease in mortality.

Prognosis

Many new biomarkers have been studied for their ability to improvement upon prediction based on traditional risk factors.[30]

Prediction of vascular disease
  Outcome Result
Framingham plus ankle brachial index   Total reclassification: 19% to 36%[31]
Traditional risk factors (Framingham) plus c-reactive protein "myocardial infarction and CHD-related death" Net reclassification improvement = 12%[32]
Traditional risk factors plus c-reactive protein and family history of MI before age 60 (Reynolds Score) All cardiovascular events Net reclassification improvement = 7% (in men)[33]

Regarding coronary heart disease, about 3/4 of its prognosis is due to three risk factors: hypercholesterolemia (total cholesterol > 182 mg/dL [4.71 mmol/L]), hypertension (diastolic blood pressure > 90 mm Hg), and cigarette smoking.[34]

Framingham risk

The Framingham risk uses clinical risk factors that are combined in an equation developed from the Framingham Heart Study to calculate prognosis. An online calculator is available at http://hp2010.nhlbihin.net/atpiii/calculator.asp.

Although many studies report better models than the Framingham model, the methods of these studies may not be adequate.[35]

Ankle brachial index (ABI)

For more information, see: Ankle brachial index.

A meta-analysis concluded that "measurement of the ABI may improve the accuracy of cardiovascular risk prediction beyond the FRS (Framingham risk score)".[31]

Reynolds Score

The Reynolds score has been proposed as an improvement to the Framingham risk by incorporating the c-reactive protein.[36][33] The score has been validated in the Women's Genome Health Study.[37] An online calculator is at http://www.reynoldsriskscore.org/.

C-reactive protein (CRP)

For more information, see: C-reactive protein.

The C-reactive protein may indicated risk in apparently healthy people due to the theory that chronic inflammation precedes atherosclerosis.[38]

The CRP is part of the Reynolds score.

References

  1. ↑ Anonymous (2024), Vascular disease (English). Medical Subject Headings. U.S. National Library of Medicine.
  2. ↑ (2002) "Behavioral counseling in primary care to promote physical activity: recommendation and rationale". Ann. Intern. Med. 137 (3): 205-7. PMID 12160370. [e]
  3. ↑ Thompson PD, Buchner D, Pina IL, et al (2003). "Exercise and physical activity in the prevention and treatment of atherosclerotic cardiovascular disease: a statement from the Council on Clinical Cardiology (Subcommittee on Exercise, Rehabilitation, and Prevention) and the Council on Nutrition, Physical Activity, and Metabolism (Subcommittee on Physical Activity)". Circulation 107 (24): 3109-16. DOI:10.1161/01.CIR.0000075572.40158.77. PMID 12821592. Research Blogging. Summary at guidelines.gov
  4. ↑ McMurry MP, Cerqueira MT, Connor SL, Connor WE (1991). "Changes in lipid and lipoprotein levels and body weight in Tarahumara Indians after consumption of an affluent diet". N. Engl. J. Med. 325 (24): 1704-8. PMID 1944471. [e]
  5. ↑ U.S. Preventive Services Task Force (March 2009). "Aspirin for the prevention of cardiovascular disease: U.S. Preventive Services Task Force recommendation statement". Ann. Intern. Med. 150 (6): 396–404. PMID 19293072. [e]
  6. ↑ 6.0 6.1 Wolff T, Miller T, Ko S (March 2009). "Aspirin for the primary prevention of cardiovascular events: an update of the evidence for the U.S. Preventive Services Task Force". Ann. Intern. Med. 150 (6): 405–10. PMID 19293073. [e]
  7. ↑ Campbell CL, Smyth S, Montalescot G, Steinhubl SR (2007). "Aspirin dose for the prevention of cardiovascular disease: a systematic review". JAMA 297 (18): 2018-24. DOI:10.1001/jama.297.18.2018. PMID 17488967. Research Blogging.
  8. ↑ 8.0 8.1 Berger J, Roncaglioni M, Avanzini F, Pangrazzi I, Tognoni G, Brown D (2006). "Aspirin for the primary prevention of cardiovascular events in women and men: a sex-specific meta-analysis of randomized controlled trials". JAMA 295 (3): 306-13. DOI:10.1001/jama.295.3.306. PMID 16418466. Research Blogging.
  9. ↑ Baigent C, Blackwell L, Collins R, et al. (May 2009). "Aspirin in the primary and secondary prevention of vascular disease: collaborative meta-analysis of individual participant data from randomised trials". Lancet 373 (9678): 1849–60. DOI:10.1016/S0140-6736(09)60503-1. PMID 19482214. Research Blogging.
  10. ↑ 10.0 10.1 Algra A, Greving JP (May 2009). "Aspirin in primary prevention: sex and baseline risk matter". Lancet 373 (9678): 1821–2. DOI:10.1016/S0140-6736(09)61003-5. PMID 19482200. Research Blogging.
  11. ↑ Pignone MP, Phillips CJ, Atkins D, Teutsch SM, Mulrow CD, Lohr KN (2001). "Screening and treating adults for lipid disorders". American Journal of Preventive Medicine 20 (3 Suppl): 77–89. PMID 11306236. [e]
  12. ↑ Screening for Lipid Disorders: Recommendations and Rationale. Retrieved on 2007-10-17.
  13. ↑ 13.0 13.1 Thavendiranathan P, Bagai A, Brookhart M, Choudhry N (2006). "Primary prevention of cardiovascular diseases with statin therapy: a meta-analysis of randomized controlled trials". Arch Intern Med 166 (21): 2307-13. DOI:10.1001/archinte.166.21.2307. PMID 17130382. Research Blogging.
  14. ↑ Baigent C, Keech A, Kearney PM, et al (2005). "Efficacy and safety of cholesterol-lowering treatment: prospective meta-analysis of data from 90,056 participants in 14 randomised trials of statins". Lancet 366 (9493): 1267-78. DOI:10.1016/S0140-6736(05)67394-1. PMID 16214597. Research Blogging.
  15. ↑ Snow V, Aronson M, Hornbake E, Mottur-Pilson C, Weiss K (2004). "Lipid control in the management of type 2 diabetes mellitus: a clinical practice guideline from the American College of Physicians". Ann Intern Med 140 (8): 644-9. PMID 15096336.
  16. ↑ Vijan S, Hayward RA (2004). "Pharmacologic lipid-lowering therapy in type 2 diabetes mellitus: background paper for the American College of Physicians". Ann. Intern. Med. 140 (8): 650-8. PMID 15096337. [e]
  17. ↑ Grundy SM, Cleeman JI, Merz CN, Brewer HB, Clark LT, Hunninghake DB, Pasternak RC, Smith SC, Stone NJ (2004). "Implications of recent clinical trials for the National Cholesterol Education Program Adult Treatment Panel III Guidelines". J. Am. Coll. Cardiol. 44 (3): 720-32. DOI:10.1016/j.jacc.2004.07.001. PMID 15358046. Research Blogging.
  18. ↑ Hayward RA, Hofer TP, Vijan S (2006). "Narrative review: lack of evidence for recommended low-density lipoprotein treatment targets: a solvable problem". Ann. Intern. Med. 145 (7): 520-30. PMID 17015870. [e]
  19. ↑ 19.0 19.1 Yokoyama M, Origasa H, Matsuzaki M, et al (2007). "Effects of eicosapentaenoic acid on major coronary events in hypercholesterolaemic patients (JELIS): a randomised open-label, blinded endpoint analysis". Lancet 369 (9567): 1090–8. DOI:10.1016/S0140-6736(07)60527-3. PMID 17398308. Research Blogging.
  20. ↑ 20.0 20.1 Gissi-Hf Investigators (August 2008). "Effect of n-3 polyunsaturated fatty acids in patients with chronic heart failure (the GISSI-HF trial): a randomised, double-blind, placebo-controlled trial". Lancet. DOI:10.1016/S0140-6736(08)61239-8. PMID 18757090. Research Blogging. Cite error: Invalid <ref> tag; name "pmid18757090" defined multiple times with different content
  21. ↑ Wang X, Qin X, Demirtas H, et al (2007). "Efficacy of folic acid supplementation in stroke prevention: a meta-analysis". Lancet 369 (9576): 1876-82. DOI:10.1016/S0140-6736(07)60854-X. PMID 17544768. Research Blogging. PMID 17544768
  22. ↑ Lonn E, Yusuf S, Arnold MJ, et al (2006). "Homocysteine lowering with folic acid and B vitamins in vascular disease". N. Engl. J. Med. 354 (15): 1567-77. DOI:10.1056/NEJMoa060900. PMID 16531613. Research Blogging. PMID 16531613
  23. ↑ Toole JF, Malinow MR, Chambless LE, et al (2004). "Lowering homocysteine in patients with ischemic stroke to prevent recurrent stroke, myocardial infarction, and death: the Vitamin Intervention for Stroke Prevention (VISP) randomized controlled trial". JAMA 291 (5): 565-75. DOI:10.1001/jama.291.5.565. PMID 14762035. Research Blogging. PMID 14762035
  24. ↑ Albert CM, Cook NR, Gaziano JM, et al (May 2008). "Effect of folic acid and B vitamins on risk of cardiovascular events and total mortality among women at high risk for cardiovascular disease: a randomized trial". JAMA 299 (17): 2027–36. DOI:10.1001/jama.299.17.2027. PMID 18460663. Research Blogging.
  25. ↑ Ebbing M, Bleie Ø, Ueland PM, et al (August 2008). "Mortality and cardiovascular events in patients treated with homocysteine-lowering B vitamins after coronary angiography: a randomized controlled trial". JAMA 300 (7): 795–804. DOI:10.1001/jama.300.7.795. PMID 18714059. Research Blogging.
  26. ↑ Ogawa H, Nakayama M, Morimoto T, et al (November 2008). "Low-dose aspirin for primary prevention of atherosclerotic events in patients with type 2 diabetes: a randomized controlled trial". JAMA 300 (18): 2134–41. DOI:10.1001/jama.2008.623. PMID 18997198. Research Blogging.
  27. ↑ Ridker PM, Danielson E, Fonseca FA, et al (November 2008). "Rosuvastatin to prevent vascular events in men and women with elevated C-reactive protein". N. Engl. J. Med. 359 (21): 2195–207. DOI:10.1056/NEJMoa0807646. PMID 18997196. Research Blogging.
  28. ↑ Gissi-HF Investigators, Tavazzi L, Maggioni AP, et al (October 2008). "Effect of rosuvastatin in patients with chronic heart failure (the GISSI-HF trial): a randomised, double-blind, placebo-controlled trial". Lancet 372 (9645): 1231–9. DOI:10.1016/S0140-6736(08)61240-4. PMID 18757089. Research Blogging.
  29. ↑ León H, Shibata MC, Sivakumaran S, Dorgan M, Chatterley T, Tsuyuki RT (2008). "Effect of fish oil on arrhythmias and mortality: systematic review". BMJ 337: a2931. PMID 19106137. PMC 2612582. [e]
  30. ↑ Wang TJ, Gona P, Larson MG, et al (December 2006). "Multiple biomarkers for the prediction of first major cardiovascular events and death". N. Engl. J. Med. 355 (25): 2631–9. DOI:10.1056/NEJMoa055373. PMID 17182988. Research Blogging.
  31. ↑ 31.0 31.1 Fowkes FG, Murray GD, Butcher I, et al (July 2008). "Ankle brachial index combined with Framingham Risk Score to predict cardiovascular events and mortality: a meta-analysis". JAMA 300 (2): 197–208. DOI:10.1001/jama.300.2.197. PMID 18612117. Research Blogging.
  32. ↑ Wilson, Peter W.F.; Michael Pencina, Paul Jacques, Jacob Selhub, Ralph D'Agostino, Christopher J. O'Donnell (2008-11-01). "C-Reactive Protein and Reclassification of Cardiovascular Risk in the Framingham Heart Study". Circ Cardiovasc Qual Outcomes 1 (2): 92-97. DOI:10.1161/CIRCOUTCOMES.108.831198. Retrieved on 2008-12-08. Research Blogging.
  33. ↑ 33.0 33.1 Ridker PM, Paynter NP, Rifai N, Gaziano JM, Cook NR (November 2008). "C-reactive protein and parental history improve global cardiovascular risk prediction: the Reynolds Risk Score for men". Circulation 118 (22): 2243–51, 4p following 2251. DOI:10.1161/CIRCULATIONAHA.108.814251. PMID 18997194. Research Blogging.
  34. ↑ Magnus P, Beaglehole R (2001). "The real contribution of the major risk factors to the coronary epidemics: time to end the "only-50%" myth". Arch. Intern. Med. 161 (22): 2657–60. PMID 11732929. [e]
  35. ↑ (2009) Assessment of Claims of Improved Prediction Beyond the Framingham Risk Score. JAMA
  36. ↑ Ridker PM, Buring JE, Rifai N, Cook NR (February 2007). "Development and validation of improved algorithms for the assessment of global cardiovascular risk in women: the Reynolds Risk Score". JAMA 297 (6): 611–9. DOI:10.1001/jama.297.6.611. PMID 17299196. Research Blogging.
  37. ↑ Paynter NP, Chasman DI, Buring JE, Shiffman D, Cook NR, Ridker PM (January 2009). "Cardiovascular disease risk prediction with and without knowledge of genetic variation at chromosome 9p21.3". Ann. Intern. Med. 150 (2): 65–72. PMID 19153409. [e]
  38. ↑ Lloyd-Jones DM, Liu K, Tian L, Greenland P. Narrative review: Assessment of C-reactive protein in risk prediction for cardiovascular disease. Ann Intern Med. 2006 Jul 4;145(1):35-42. PMID 16818927
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