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Type 2 diabetes and atherosclerotic vascular disease develop in parallel. Prospective epidemiologic studies have shown a striking communality of major risk factors for both diseases. This raises the question of a "common soil". The traits of the metabolic syndrome including dyslipidemia, visceral obesity and hypertension are predictors of type 2 diabetes as well as coronary heart disease. The same applies to the environmental factors: overnutrition, physical inertia and smoking. Visceral obesity, insulin resistance and low-grade inflammation are known as major components of the common soil for metabolic syndrome and coronary heart disease. Depending on the quality of metabolic control diabetes will accelerate the progression of atherosclerosis via unstable plaque formation. The "common soil" concept provides a paradigm for an integrated therapeutic approach. This applies to a lifestyle intervention as well as a rational use of drugs in diseases of the metabolic syndrome. The medication should consider coexisting disorders of the metabolic syndrome to use pleiotropic effects. On the other hand, side effect such as the worsening of blood glucose levels caused by beta-blockers and diuretics should be avoided. The following medication should be preferred in context of the metabolic syndrome: oral antidiabetics such as acarbose, metformin and thiazolidinediones, antihypertensives such as ACE inhibitors and ARBs (angiotensin receptor blockers) and lipid-lowering drugs such as atorvastatin, rosuvastatin, and the modern nicotinic acid derivative Niaspan, respectively. The strategy using synergies in drug treatment can reduce polypharmacy and costs and improve the patients' compliance.
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PMID:[Metabolic syndrome: "common soil" for diabetes and atherosclerosis. Novel approaches to an integrated therapy]. 1677 May 62

The metabolic syndrome or cardiovascular dysmetabolic syndrome is characterized by obesity, central obesity, insulin resistance, atherogenic dyslipidemia, and hypertension. The major risk factors leading to this syndrome are physical inactivity and an atherogenic diet and cornerstone clinical feature is abdominal obesity or adiposity. In addition, patients usually have elevated triglycerides, low HDL cholesterol, elevated LDL cholesterol, other abnormal lipid parameters, hypertension, and elevated fasting blood glucose. Impaired fibrinolysis, increased susceptibility to thrombotic events, and raised inflammatory markers are also observed. Given that India has the largest number of subjects with type-2 diabetes in the world it can be extrapolated that this country also has the largest number of patients with the metabolic syndrome. Epidemiological studies confirm a high prevalence. Therapeutic approach involves intervention at a macro-level and control of multiple risk factors using therapeutic lifestyle approaches (diet control and increased physical activity, pharmacotherapy - anti-obesity agents) for control of obesity and visceral obesity, and targeted approach for control of individual risk factors. Pharmacological therapy is a critical step in the management of patients with metabolic syndrome when lifestyle modifications fail to achieve the therapeutic goals. Anti-obesity drugs such as sibutramine and orlistat can be tried to reduce weight and central obesity and jointly control the metabolic syndrome components. Other than weight loss, there is no single best therapy and treatment should consist of treatment of individual components of the metabolic syndrome. Newer drugs such as the endocannabinoid receptor blocker,rimonabant, appear promising in this regard. Atherogenic dyslipidemia should be controlled initially with statins if there is an increase in LDL cholesterol. If there are other lipid abnormalities then combination therapy of statin with fibrates, nicotinic acid, or ezetimibe should be considered. For insulin resistance, drugs such as thiazolidinediones and renin-angiotensin system blockers are available. Available evidence suggests that angiotensin converting enzyme (ACE) inhibitors and angiotensin receptor blockers (ARBS) may be more beneficial for treatment of hypertension in patients with metabolic syndrome compared to others as these drugs also prevent development of diabetes. Patients with metabolic syndrome also have elevations in fibrinogen and other coagulation factors leading to prothrombotic state and aspirin may be beneficial for primary prevention in these patients. The new developments in the treatment of metabolic syndrome with drugs, such as peroxisome proliferator-activated receptor (PPAR) agonists and cannabinoid receptor-1 antagonists, will broaden the horizons of the current treatment options. Fixed-dose combination polypharmacy using a single pill is an interesting concept that needs to be evaluated in long-term prospective trials in such patients.
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PMID:Management issues in the metabolic syndrome. 1721 77

In the United States, 18 million adults have diabetes and an additional 16 million have impaired glucose tolerance. Of these patients, 75% will die of some form of heart or vascular disease. Furthermore, recent data suggest that even prediabetic patients are at increased risk for cardiovascular (CV) events. Patients with diabetes often have multiple comorbid CV risk factors (e.g., dyslipidemia, hypertension, hyperglycemia) that synergistically interact to accelerate the pathogenesis of CV disease and dramatically increase the risk for CV events. For example, compared with patients without diabetes, patients with diabetes have a 3- to 5-fold increased risk of death due to congestive heart disease at every cholesterol level and are at increased risk for hypertension and hypertension-related CV events. Patients with diabetes are likely to benefit from intensive therapy incorporating multiple CV risk-reduction strategies. Lipid-modification--primarily reducing levels of low-density lipoprotein cholesterol (LDL-C) and triglycerides and increasing high-density lipoprotein cholesterol (HDL-C) through pharmacologic and lifestyle intervention--is an integral part of such therapy. Patients with diabetes will also benefit from intensive blood pressure-lowering therapy with multiple classes of antihypertensives including angiotensin-converting enzyme inhibitors and angiotensin receptor blockers in particular, as well as concomitant antiplatelet therapy. An intensive risk-reduction approach combining these treatments would dramatically reduce the incidence of CV morbidity and mortality in this high-risk patient population.
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PMID:The patient with diabetes: preventing cardiovascular complications. 1743 22

Metabolic syndrome (MetS) has been defined in different ways. However, key components common to most definitions are a constellation of risk factors including abdominal adiposity, impaired fasting glucose, hypertension, and dyslipidemia. A major mediator of MetS appears to be insulin resistance, which relates to the development of the vascular and metabolic dysfunctions that precede overt cardiovascular disease and type 2 diabetes. Evidence suggests that the mechanisms underlying the elevated cardiovascular risk associated with MetS begin with subclinical organ damage. Therapy for MetS targets individual components of the syndrome and includes lifestyle interventions, lipid-modifying therapy, and antihypertensive agents, particularly those that inhibit the renin-angiotensin system. Results of trials of angiotensin-converting enzyme inhibitors and angiotensin receptor blockers have demonstrated reductions in new-onset diabetes and cardiovascular events in a wide range of patients. Clinical trials to investigate further the role of these drugs in the primary prevention of type 2 diabetes in patients with MetS are currently under way. The purpose of this paper is to review the MetS from the perspective of the cardiology workforce with the hope that a better understanding of the links between MetS and cardiovascular disease could lead to improved management of persons at risk.
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PMID:Metabolic syndrome and cardiovascular disease: challenges and opportunities. 1760 58

Metabolic syndrome (MetSyndr), a constellation of abnormalities [obesity, glucose intolerance, insulin resistance (IR), dyslipidemia (low HDL-cholesterol, high LDL-cholesterol and triglycerides (TG)], and elevated blood pressure (BP)], increases the risk of cardiovascular (CV) disease and premature death. From 10% to 30% of the adult population in industrialized countries has MetSyndr, which effectively predicts the development of type 2 diabetes mellitus (T2D) and CV disease. Because of the complex etiology of MetSyndr, a multi-targeted, integrated therapeutic approach is required to simultaneously treat high BP, obesity, lipid disorders and T2D (if present), to fully protect CV, cerebrovascular and renal systems. If lifestyle modification (weight control, diet, exercise, smoking cessation, moderation of alcohol intake) is ineffective, pharmaco-theraphy should be added to treat simultaneously the lipid- and non-lipid CV risk factors. Patients with HTN and MetSyndr should be started on angiotensin-converting enzyme (ACE) inhibitors, unless contraindicated. The ACE inhibitors and angiotensin receptor blockers (ARBs) reduce the odds of developing new onset T2D and also decrease albuminuria. The ACE inhibitors provide cardioprotective and renoprotective benefits beyond their effect on BP; they also improve IR. The ARBs are renoprotective in addition to being cardioprotective. Long-acting calcium channel blockers are also recommended in hypertensive patients with MetSyndr; these drugs also improve IR. Thiazides (at low doses) and selected ss-blockers can be given to patients with HTN and MetSyndr. Celiprolol in combination with diuretics has a favorable effect on glucose tolerance and IR in patients with HTN and MetSyndr, and spironolactone added to ACE inhibitor or ARB therapy provides additional reno- and CV protective benefits in patients with diabetic nephropathy. Carvedilol, a ss-blocker with vasodilating properties, added to ACE inhibitor or ARB therapy, is effective in preventing worsening of microalbuminuria in patients with HTN and MetSyndr; it also improves IR and glycemic control. Most patients eventually require two or more antihypertensive drugs to reach BP goal. It is recommended that therapy in patients whose BP is more than 20/10 mm Hg above target at diagnosis be initiated with a combination of antihypertensive drugs, administered either as individual drugs or as fixed-dose formulations. Treatment with fixed-dose combinations, such as irbesartan + hydrochlorothiazide provides good BP control in more than two-thirds of hypertensive patients with MetSyndr. Lipid and BP targets are reached in a high percent of patients with HTN and CV disease treated with a combination of amlodipine + atorvastatin. In conclusion, hypertensive patients with the MetSyndr be treated aggressively for each component of the syndrome to provide CV, cerebrovascular and renal protection.
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PMID:Metabolic syndrome: treatment of hypertensive patients. 1766 15

The regulation of blood glucose levels involves a finely tuned relationship between insulin sensitivity, hepatic glucose output, and production of insulin. The cardiometabolic syndrome includes in its definition criteria a disturbance of normal glucose tolerance and implies development of both insulin resistance and beta-cell dysfunction. There is now abundant evidence pointing toward a central role of dysregulation of the beta-cell function and mass in the development of impaired glucose tolerance. Mechanisms implicated in beta-cell dysfunction include genetic abnormalities, prenatal and early postnatal insults, and environmental events along with obesity, dyslipidemia-lipotoxicity, glucotoxicity, oxidative stress, chronic low-grade inflammation, amyloid deposition, and activation of the local renin-angiotensin system. Novel therapeutic characteristics of known medications such as metformin, thiazolidinediones, angiotensin-converting enzyme inhibitors/angiotensin receptor blockers, and novel medications such as exendin-4 promise encouraging possibilities to battle against the cardiometabolic syndrome and the future development of cardiovascular disease.
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PMID:The role of beta-cell dysfunction in the cardiometabolic syndrome. 1767

The identification and treatment of high-risk patients for cardiovascular disease reduces the risk of morbidity and mortality. Significant risk factors for cardiovascular events in hypertensive patients over and above dyslipidemia, smoking, and obesity include coronary heart disease, peripheral arterial disease, cerebrovascular/carotid artery disease, and diabetes. Treatment options for the reduction of cardiovascular events in hypertensive patients include diuretics, beta-blockers, alpha-blockers, calcium channel blockers, angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), and aldosterone antagonists. All of these agents, in various combinations, have been found to reduce the risk of cardiovascular events, even in high-risk patients. The use of ACE inhibitors or ARBs (usually in combination with a diuretic) has proven especially effective in reducing cardiovascular events in diabetes and, although both classes of drugs target the renin-angiotensin-aldosterone system, each has a different mechanism of action. Some investigators believe that combination therapy with an ACE inhibitor and ARB, usually given with other medications, may be more effective than either agent alone with other drugs. The Ongoing Telmisartan Alone and in Combination With Ramipril Global Endpoint Trial (ONTARGET) is evaluating the cardioprotective effect of an ACE inhibitor (ramipril) plus an ARB (telmisartan) in high-risk patients.
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PMID:Evolving treatment options for prevention of cardiovascular events in high-risk hypertensive patients. 1797 96

Current guidelines for the prevention of coronary heart disease emphasize the importance of global cardiovascular risk, which requires the evaluation and treatment of multiple risk factors. Cardiovascular risk can be stratified with the Framingham algorithm, which produces a numerical score related to the presence of risk factors, such as hypertension, dyslipidemia, and smoking. However, this algorithm is not generally applicable to European countries, particularly for those countries where the risk for cardiovascular disease is low. The SCORE (Systematic COronary Risk Evaluation) project has produced risk charts that are based on cholesterol, blood pressure, and age for low-risk European countries (Belgium, France, Greece, Italy, Luxembourg, Spain, and Switzerland) and high-risk countries. Assessments of end-organ damage can provide further prognostic information, particularly in intermediate-risk patients, but the value of including additional biomarkers in risk stratification remains to be confirmed. Risk for coronary heart disease is high or very high in more than 50% of hypertensive patients. Risk appears to be underestimated in clinical practice, particularly in those patients at highest risk. Major intervention trials with angiotensin-converting enzyme inhibitors or angiotensin receptor blockers have shown that these agents reduce the risk for cardiovascular events in patients at all levels of risk, with the greatest benefits seen in those at highest risk.
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PMID:Cardiovascular high-risk patients--treat to protect, but whom? 1844 78

Acute and especially chronic renal failure (CRF) are relatively common and important risk factor for morbidity and mortality in patients after heart, lung, liver or intestine transplantation. Numerous factors contribute to the development of CRF in this group of patients, like treatment with calcineurin inhibitors and other nephrotoxic drugs in the perioperative period, hemodynamical changes during and after the surgery, preexistent renal disease, hypertension, diabetes mellitus, dyslipidemia and anemia. Pretransplant evaluation of renal function is mandatory to predict which patients have increased risk for development of CRF. In the posttransplantation course it is necessary to timely diagnose and treat renal failure, while patients with insufficient renal function have 4.55-fold increased risk of death compared to patients with normal renal function. Special problem is diagnostic approach to patients with suspected chronic renal disease who are candidates for transplantation of other parenhimatose organs. Diagnostic value of serum creatinine and estimation of renal function based on its value is very limited. Gold diagnostic standard is radioisotope estimation of glomerular filtration, but this method is not widely available. It seems that this problem may be solved with the use of cystatin C, but this approach needs to be validated in large studies. Numerous different immunosuppressive drugs available on the market enable individualization of immunosuppression. Different drugs combinations may have less nephrotoxic potential, but one must be careful because of the possible risk of organ rejection with the change of immunosuppression. Use of angiotensin convertase enzyme inhibitors and/or angiotensin receptor blockers, statins with drugs for control of hyperglycemia, may prevent or postpone development of CRF. Although technical advances of contemporary hemodialysis machines and peritoneal dialysis equipment enable well tolerated dialysis even in critically ill patients, renal transplantation remains the method of choice for treatment of patients with transplanted parenhimatous organ that developed CRF.
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PMID:[Chronic renal failure after heart, lung, liver, or intestine transplantation]. 1857 34

Endothelial cells detect physical and chemical changes in the blood vessels, and release various factors to counter these changes to maintain homeostasis. Traditional cardiovascular disease risk factors, such as hypertension, dyslipidemia and diabetes, cause endothelial dysfunction characterized by off-balanced vasodilation/vasoconstriction, increased oxidative stress and inflammation, deregulation of thrombosis and fibrinolysis, abnormal smooth muscle cell proliferation, and a deficient repair mechanism. Patients with chronic kidney disease (CKD) have a much higher risk of cardiovascular disease and mortality than the general population. Endothelial dysfunction is commonly observed in CKD, likely preceding other cardiovascular complications. Lipid-lowering agents, such as statins, improve endothelial functions and are effective in reducing cardiovascular disease risk in the general population, but have not demonstrated comparable efficacy in the CKD patient population. Similarly, antidiabetic agents, such as thiazolidinediones, that improve endothelial function in the general population are less efficacious than expected in slowing disease progression and reducing cardiovascular disease risk in CKD patients. Interestingly, agents that activate the vitamin D receptor (VDR) for the treatment of hyperparathyroidism secondary to CKD are associated with a survival benefit in CKD patients that is likely mediated through the effects of the VDR on modulating key components involved in endothelial dysfunction. However, a randomized, clinical study is required to confirm the survival benefit of VDR activation therapy for CKD patients. Results from clinical studies suggest that managing hypertension alone may not be adequate in slowing CKD progression and its related cardiovascular complications. Angiotensin-converting enzyme inhibitors and angiotensin receptor blockers that target the renin-angiotensin system slow CKD progression, possibly due to their effects on improving endothelial function, independent of controlling blood pressure.
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PMID:Endothelial dysfunction and chronic kidney disease: treatment options. 1872 4


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