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Diabetes and its Cardiovascular Impact Dr Rashid Iqbal Consultant Cardiologist Surrey and Sussex Healthcare NHS Turst St Georges Hospitals NHS Trust Spire Gatwick Park Hospital
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Aims Epidemiology of DM Coronary Artery Disease in Diabetes How to protect Diabetic Heart?
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Diabetes Prevalence Worldwide In 2000 2.8% (171 million) By 2030 4.4% (366 million) A 36 % increase in 30 years Wild S et al Diabetes Care 2004;27:1047-53
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0 1995200020052010201520202025 2030 100 150 300 350 50 200 250 Diabetes – Prevalence Year 2000: 177 million Year 2030: 370 million. equivalent to 2/3 rd of Europe population
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Diabetes Doubles Risk for MI Mortality Despite Advances in Cardiac Care
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Glycemic disorders Dyslipidemia - Low HDL - Small, dense LDL - Hypertriglyceridemia -Postprandial lipemia Hypertension Impaired thrombolysis - PAI-1, fibrinogen Endothelial dysfunction/ inflammation - CRP, MMP-9, adiponectin Microalbuminuria Visceral Obesity Insulin Resistance Free Fatty Acids Atherosclerosis The Metabolic Syndrome: A Network of Atherogenic Factors Brunzell J, Hokanson J. Diabetes Care. 1999;22(Suppl 3):C10-C13. McFarlane S, et al. J Clin Endocrinol Metab. 2001;86(2):713-718. Frohlich M, et al. Diabetes Care. 2000;23(12):1835-1839. Kuusisto J, et al. Circulation. 1995;91:831-837. Parulkar AA, et al. Ann Intern Med. 2001;134:61-71. Hseuh WA, et al. Diabetes Care. 2001;24(2):392-397. Lebovitz H. Clin Chem. 1999;45(8B):1339-1345.
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Cardiovascular Mortality Associated With Metabolic Syndrome Diabetes Care 2001;24:683 p < 0.001
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Cardiovascular Disease Early, aggressive interventions for risk reduction New, more effective therapies for treatment of HTN and hyperlipidemia Dramatic improvement in cardiovascular interventions Reduction in smoking ? Yet the increase in prevalence of obesity and diabetes is epidemic, with CVD the leading complication of DM
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ACS Treatment STMI- Aim for PPCI NSTMI- Aim to catheterise within 72hours Secodary prevention: DAPT, Aspirin for life, Clopidogrel/Prasugrel/Ticagrelol 12 MONTHS High dose Statin +/- Ezatemibe ( In-Practice Study and NICE guidance. Betablocker/ACE Inhibition Smoking cessation Cardiac Rehab
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PCI Case
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Diabetes and Heart Failure: Current Knowledge
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Stenting in Diabetes: Clinical and Angiographic Outcomes BARI – Mortality after CABG vs. PTCA, 2000
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Co-morbidity (PVD , CRF ) Peri-procedural complications Worse long-term clinical outcomes death , MI , stroke Excessive restenosis intimal hyperplasia negative remodeling Accelerated atherosclerosis progression of disease small vessel/diffuse disease Revascularization in Diabetes: BARI 2-D All-cause mortality CVD mortality & MI Angina, employment Retinopathy Neuropathy Nephropathy PVD HbA1c, BP, cholesterol Cost-effectiveness
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Blood Glucose Relates to Mortality and Risk for Heart Failure in MI
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Glycemic Control and Risk of Development of HF in Diabetes
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Syst-Eur: Reduction in Event Rate in Adults ( 60 Years) With Diabetes
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HOT: Cardiovascular Events by Target DBP in Diabetes Subgroup
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ACE Inhibitor Therapy for Patients With Diabetes
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HOPE: Outcomes in Patients With Diabetes
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BIP: -Blocker Treatment Improves Survival of Patients With Diabetes
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Costs - Fact File Studies have shown that diabetes is a costly disease Type 2 diabetes accounted for between 3% and 6% of total healthcare expenditure in eight European countries Hospital in-patient costs are the largest single contributor to direct healthcare costs
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Diabetes-CVD Facts More than 65% of all deaths in people with diabetes are caused by cardiovascular disease. Heart attacks occur at an earlier age in people with diabetes and often result in premature death. 3
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Diabetes-CVD Facts Up to 60% of adults with diabetes have high blood pressure. Nearly all adults with diabetes have one or more cholesterol problems, such as: –high triglycerides –low HDL cholesterol –high LDL cholesterol 4
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The Good News… By managing the ABCs of diabetes, people with diabetes can reduce their risk for heart disease and stroke. A stands for A1C B stands for Blood pressure C stands for Cholesterol 5
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Ask About Your A1C A1C measures average blood glucose over the last three months. Get your A1C checked at least twice a year. A1C Goal = less than 7% 6
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Treating Cardiovascular risk factors… Managing the ABCs of diabetes, people with diabetes can reduce their risk for heart disease and stroke. A stands for A1C B stands for Blood pressure C stands for Cholesterol 5
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HbA 1c % 7.0% versus 7.9% Reduction in risk by: 25%for eye disease and early kidney disease 16%for Heart Attacks 24%for cataract surgery Reduction in risk by: 25%for eye disease and early kidney disease 16%for Heart Attacks 24%for cataract surgery
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Risk Reduction With a 1% Reduction in HbA 1c : Any lower is therefore better! 16% Heart failure 43% Amputation / death from leg vessel problems 37% Eye and early kidney disease 12%Stroke 14% Heart Attacks 21% Deaths related to diabetes
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Pharmacotherapy of Hypertension Aim for 125/75-80 ACE inhibitors and ARBs have a favorable effect on renal and cardiovascular systems. ß-blockers along with ACE inhibitors help in reducing myocardial infarction and heart failure. Calcium channel blockers in combination with ACE inhibitors, ß-blockers, and diuretics help in controlling blood pressure. Diuretics are recommended when BP control is still uncontrolled.
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Cholesterol lowering reduces Heart Disease in Patients with Diabetes by up to 55% ! 1234560 0 20 40 60 80 100 Risk reduction reduction 55% Diabetic,simvastatin Diabetic, placebo Years since randomisation Patients with heart disease (%)
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Multiple aetiology of atherosclerosis generation increased inflammatory markers hyperglycaemia induced endothelial dysfunction increased vascular permeability adventitial inflammation (of vasa vasorum) impaired fibrinolysis dysfunctional arterial remodelling
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v
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Plaque Disruption & Thrombosis Journal of medicine
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Atherothrombotic plaque in diabetic patients More in number More likely to rupture More likely to have existing surface thrombus
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Antiplatelets Aspirin 75mg once daily : Aspirin 75mg once daily : Diabetes UK advises aspirin treatment in all patients with diabetes over the age of 30 years with any of the following: Diabetes UK advises aspirin treatment in all patients with diabetes over the age of 30 years with any of the following: previous MI, angina, HT, diabetic eye disease, PVD, early kidney disease, raised cholesterol, family history of heart disease, obesity, south Asians smokers, DM duration > 10 years. Clopidogrel can be used as an alternative.
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DES in Diabetes Both Sirolimus- and Paclitaxel-eluting stents substantially reduce angiographic and clinical restenosis compared with BMS DES have not eliminated the excess risk of restenosis in diabetics c/w non-diabetics
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CABG: the “diabetic disadvantage” Society of Thoracic Surgeons database of 1.37 million patients undergoing cardiac surgery (1990-2000). Diabetic patients had higher rates of: 30 day mortality and deep sternal wound infections stroke longer hospital stay two-fold worse 10 year survival (36835 pts) Brown et al Semin Thorac Cardiovasc Surg 2006;18:281
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PCI v CABG( SYNTAX) No mortality difference at 1 year Higher incidence of CVA after CABG More frequent angina after PCI More frequent angiography and repeat revascularisation after PCI
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Reducing risk in patients undergoing PCI – what can we do? Tight glycaemic control (HbA1c ≤7) pre and post procedure ( Corpus et al JACC 2004;43:8 ) Thiazolidinediones – may reduce neointimal proliferation and restenosis in T2DM receiving BMS Antithrhrombotic therapy Drug eluting stents
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Conclusion Diabetic patients are different 1.Epidemiology: increasing prevalence worldwide 2.Pathology: their vasculature is different - plaques more frequent and more prone to rupture. 3.Outcomes: for patients with type 2 diabetes sustaining an acute myocardial infarction is poor particularly if they have documented coronary artery disease. 4.Treatment: Modern therapies have a favourable effect but there remains a residual risk not addressed by these therapies.
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