Type 2 (non-insulin-dependent) diabetes mellitus and coronary heart disease — chicken,egg or neither?

Summary Review of the literature yields much evidence against a correlation between duration of non-insulin-dependent diabetes mellitus (Type 2 diabetes) and the degree of coronary atherosclerosis or the risk of clinically evident coronary heart disease (CHD). Furthermore, an increased risk of CHD, similar to that in previously diagnosed diabetic subjects, has been demonstrated in persons with impaired glucose tolerance. These observations suggest that an increased risk of CHD is not a consequence of the development of diabetes (i. e. persistent hyperglycaemia). It is more likely that diabetes develops in individuals who already possess characteristics which increase the risk of CHD in addition to the risk of developing diabetes.     

The association of coronary calcium score and conventional cardiovascular risk factors in Type 2 diabetic subjects asymptomatic for coronary heart disease (The PREDICT Study).

AIM: To determine the association between coronary calcification score (CACS) obtained by electron beam computed tomography (EBCT) and cardiovascular risk factors in Type 2 diabetic subjects entered into a prospective cohort study. METHODS: Type 2 diabetic subjects attending routine hospital diabetic clinics without known coronary heart disease (CHD) underwent EBCT to measure CACS. Demographic data were obtained and conventional cardiovascular risk factors were measured at baseline. RESULTS: Four hundred and ninety-five subjects were assessed of whom 67.7% were male. They had a mean (SD) age of 62.9 (7.1) years, with median (inter-quartile range) duration of diabetes of 8 (4-13) years. None had a history of coronary artery disease. Forty-five per cent were receiving lipid-lowering agents (including 36% statins). In a univariate analysis, there were significant associations between increased CACS and age, duration of diabetes, male gender, waist-hip ratio (WHR), systolic blood pressure, and the use of statins. In a multivariate model adjusting for the possible interaction of these and other factors, the significant association between CACS and WHR, systolic blood pressure, male gender and statin use remained. CONCLUSIONS: The close association between CACS and WHR and the association with systolic blood pressure suggest that coronary calcification may be particularly linked to the metabolic syndrome in Type 2 diabetes.     

Prevalence of coronary heart disease,left ventricular failure and hypertension in middle-aged,newly diagnosed Type 2 (non-insulin-dependent) diabetic subjects

Summary The prevalence of coronary heart disease, left ventricular failure and hypertension was examined in a representative group of 133 newly diagnosed Type 2 (non-insulin-dependent) diabetic subjects (70 men, 63 women), aged 45 to 64 years, and in a group of 144 randomly selected non-diabetic control subjects (62 men, 82 women) of the same age group. The prevalence of previous myocardial infarction (major Q-QS abnormalities in resting ECG and/or myocardial infarction verified at hospital) was increased 1.7-fold in male (NS) and 4.4-fold in female (p = 0.007) diabetic patients compared with that found in non-diabetic subjects. Chest pain symptoms and ischaemic ECG abnormalities were about twice as common among diabetic than among non-diabetic subjects. The frequency of coronary heart disease defined by chest pain symptoms and ECG abnormalities was 3.5 times higher in male (p = 0.001) and 3.1 times higher in female (p = 0.001) diabetic patients than in the respective non-diabetic subjects. The frequency of current digitalis therapy was increased 3.3-fold in male (p = 0.006) and 3.9-fold in female (p = 0.001) diabetic patients suggesting an increased frequency of left ventricular failure among diabetic subjects. The prevalence of hypertension, based on the elevated blood pressure levels and/or current use of antihypertensive drugs, was increased 1.6–1.7-fold among the diabetic patients.     

Incidence,prevalence and coronary heart disease risk level in known Type 2 diabetes: a sentinel practice network study in the Basque Country,Spain

Aims/hypothesis The aim of this study was to determine the incidence, prevalence and coronary heart disease risk in patients with known Type 2 (non-insulin-dependent) diabetes mellitus in a Basque Country sentinel practice network study.Methods During the year 2000 we did a survey among sentinel practitioners who registered information about previously and newly diagnosed Type 2 diabetic patients older than 24 years of age. We studied 65,651 people attending a primary care service in the Basque Country Health Service-Osakidetza. We collected information about diabetic complications and cardiovascular risk factors and measured the coronary heart disease risk in these patients.Results In the year 2000, the standardized cumulative incidence and prevalence of known Type 2 diabetes were 5.0 per 1000 (CI 95%: 4.9–5.1) and 4.6% (CI 95%: 4.5–4.7) respectively. Macroangiopathy was the most frequent complication both in the newly diagnosed (21.6%) and previously known Type 2 diabetic patients (33%). Total cholesterol 5.17 mmol/l and LDL cholesterol 2.58 mmol/l were found in 75% and 90% of newly diagnosed and 65% and 85% of previously diagnosed Type 2 diabetic patients respectively. Of the Type 2 diabetic patients 42% were obese and 80% had high blood pressure. More than 55% of the men compared with 44% of the women with Type 2 diabetes had high or very high risk of coronary heart disease (p<0.05).Conclusion/interpretation We report new epidemiological data on known Type 2 diabetes in the Basque Country. These patients have a high frequency of cardiovascular risk factors causing a high coronary heart disease risk.Abbreviations WHO MSVDD Word Health Organization Multinational Study of Vascular Disease in Diabetes - UKPDS United Kingdom Prospective Diabetes Study - MRFIT Multiple Risk Factor Intervention TrialThe authors wrote this article on behalf of and with the assistance of the Basque Country Sentinel Practice Surveillance Network: see acknowledgements for list of investigators     

脂联素与冠心病类型和心血管危险因素的关系

目的:明确冠心病(CHD)患者脂联素(APN)水平是否下降,确定低APN血症是否是CHD的危险因素及APN水平与CHD类型和心血管危险因素间的关系。方法:117例研究对象分为对照组(CO)、稳定型心绞痛组(SAP)和急性冠状动脉综合征(ACS)组。SAP、ACS组与CO组进行比较了解CHD患者APN水平;比较不同类型患者的APN水平以确定APN水平与CHD类型间的关系;经logistic回归分析确定低APN血症是否是CHD的危险因素;比较合并某一心血管危险因素者与不合并者的APN水平,了解心血管危险因素对APN水平的影响。结果:CO组、SAP组、ACS组3组比较APN呈降低趋势(10.61±3.38,6.98±3.18,4.59±3.69,P0.05);逐步logistic回归分析结果显示低APN血症(OR值=0.788,p=0.041)、高胆固醇血症(OR值=5.096,p=0.009)为CHD患病的独立危险因素;超重或肥胖、血脂异常、男性、吸烟、合并3个及3个以上危险因素的CHD患者APN水平降低(P0.05),合并高血压和糖尿病者APN水平无明显下降。结论:CHD患者APN水平下降,ACS患者APN水平较SAP患者进一步下降。低APN血症是CHD的危险因素。肥胖、吸烟、男性、血脂异常可使APN水平下降,且合并心血管危险因素多者APN水平进一步降低。     

The prevalence of coronary heart disease in the multiethnic and high diabetes prevalence population of Mauritius

Abstract. The prevalence of coronary heart disease (CHD) was determined in a population survey in Mauritius where the prevalence of non-insulin dependent diabetes and mortality from CHD are amongst the highest in the world. Men and women aged 35–74 years of all major ethnic groups were included: Asian Indians (Hindus and Muslims). Creoles and Chinese. ECG abnormalities suggesting either ‘probable CHD’ or ‘possible CHD’ were defined using standard criteria. The overall prevalence of probable CHD was 2.7% in men and 0.9% in women, and that of probable or possible CHD together 17.8% in men and 33.3% in women. The prevalence of CHD did not vary significantly between the four ethnic groups. In the multivariate analyses, age and high blood pressure were the most important independent predictors of ECG abnormalities. Neither diabetes nor serum insulin seemed to contribute independently to the prevalence of CHD. This survey confirmed the high ranking of Mauritius in international mortality statistics. The high rates of CHD seen in Asian Indians, African-origin Creoles and Chinese in the rapidly developing country of Mauritius may be a pointer to future problems in their regions of origin.     

Impact of metabolic syndrome criteria on cardiovascular disease risk in people with newly diagnosed type 2 diabetes

Aims/hypothesis We investigated the prognostic implication of metabolic syndrome according to modified National Cholesterol Education Program criteria and the implication of individual features of metabolic syndrome on cardiovascular disease (CVD) and CHD in a 5-year community-based study of people with newly diagnosed type 2 diabetes. Methods We entered 562 participants, aged 30–74 years, into a cross-sectional analysis and 428 participants (comprising those who were CVD-free at study entry) into a prospective analysis. In both analyses, the association of metabolic syndrome features with CVD/CHD was studied. Binary logistic regression, a Cox regression model and Fisher's exact test were used for statistical analyses. Results At diagnosis of type 2 diabetes, metabolic syndrome was independently associated with CVD (odds ratio [OR] 2.54; p=0.006) and CHD (OR 4.06; p=0.002). In the 5-year follow-up, metabolic syndrome at baseline was an independent predictor of incident CVD (hazard ratio [HR] 2.05; p=0.019). An increase in the number of individual features of the metabolic syndrome present at the time of diagnosis of type 2 diabetes was associated with a linear increase in incident CVD risk (trend p=0.044) with an almost five-fold increase when all five features were present, compared with hyperglycaemia alone (HR 4.76; p=0.042). Increasing age (HR 1.07; p<0.001), female sex (HR 0.62; p=0.032), total cholesterol (HR 1.43; p=0.01) and lipid-lowering therapy (HR 0.32; p<0.001) were also independent predictors of risk. Conclusions/interpretation Metabolic syndrome at baseline is associated with an increased risk of incident CVD in the 5 years following diagnosis of type 2 diabetes. CVD-free survival rates declined incrementally as the presence of metabolic syndrome features increased. Thus, identifying the features of metabolic syndrome at diagnosis of type 2 diabetes is potentially a useful prognostic tool for identifying individuals at increased risk of CVD.     

老年2型糖尿病合并冠心病的危险因素分析

目的 探讨老年2型糖尿病(T2DM)合并冠心病的危险因素.方法 选择2010年8月至2012年8月我院收治的120例2型糖尿病患者为研究对象,根据是否合并冠心病将其分为两组,对两组患者的临床资料进行比较分析,探讨影响T2DM合并冠心病的危险因素.结果 观察组的病程、BMI、SBP、TG、HDL-C、LDL-C、UA等指标与对照组相比差异有统计学意义(P＜0.05).Logistic回归分析结果显示,糖尿病合并冠心病的危险因素为病程＞10年、高血压、高血脂、高血清尿酸.结论 病程＞10年、高血压、高血脂、高血清尿酸为老年2型糖尿病合并冠心病的危险因素.     

Coronary heart disease in young Type 1 (insulin-dependent) diabetic patients with and without diabetic nephropathy: incidence and risk factors

Summary Fifty-nine Type 1 (insulin-dependent) diabetic patients with (group I) and 59 patients without nephropathy (group II) pair-matched according to sex (30 males and 29 females), age (33 years, range 15–48) and diabetes duration (19 years, range 6–42) were followed for a period of 10 years from about 5 years before to 5 years after onset of proteinuria. The cumulative incidence of coronary heart disease was estimated, and blood pressure and serum cholesterol were followed. Within six years after onset of proteinuria the cumulative incidence of coronary heart disease was increased eight-fold in group I (40%) compared with group II (5%), (p<0.001). Blood pressure was higher in group I compared with group II from before onset of proteinuria (135/86±17/9 mmHg vs 129/80±15/8 mmHg, p<0.001), and serum cholesterol elevated from onset of proteinuria in group I (6.3±1.2 mmol/l) vs. group II (5.5±1.0 mmol/l), (p<0.005). Patients in group I who developed coronary heart disease had similar age (36 years, range 21–51, vs 38 years, range 21–53), sex (50% males vs. 52% males), smoking frequency (50% vs 49%), diabetes duration (22 years, range 9–39, vs 24 years, range 10–42) and serum creatinine (110 mol/l, range 69–284, vs 108 mol, range 72–1024) compared with patients not developing coronary heart disease. However, the patients with coronary heart disease had higher blood pressure (135/87mmHg±16/9 vs 128/82±15/7, p<0.05) and serum cholesterol (7.3 mmol/l+ 1.2 vs 6.4 mmol/l±0.9, p<0.05) than patients without coronary heart disease. Thus, patients developing clinical nephropathy have a highly increased incidence of coronary heart disease compared with patients not developing nephropathy. Patients who developed coronary heart disease were characterized by higher blood pressure and serum cholesterol.     

Plasma leptin concentration in patients with Type 2 diabetes: relationship to cardiovascular disease risk factors and insulin resistance.

AIMS: The aim of this study was to evaluate the relationship of obesity, leptin, insulin resistance and C-reactive protein (CRP) with coronary heart disease (CHD) risk factors in patients with Type 2 diabetes mellitus (DM) with CHD compared with those with Type 2 DM without CHD. METHODS: Leptin, CRP (high sensitivity assay), fasting plasma insulin, glucose, HbA(1c) and full lipid profile were determined in 58 Type 2 diabetic patients with CHD and 87 Type 2 DM patients without CHD. RESULTS: were compared between those with and without CHD. Univariate correlation as well as logistic regression analyses were used to relate these markers with traditional CHD risk factors. RESULTS: Leptin showed significant correlations with BMI (r = 0.59; P < or = 0.0001), waist circumference (r = 0.45; P < 0.0001), CRP (r = 0.36; P < 0.0001), and fasting insulin (r = 0.53; P < 0.0001) as well as with systolic (r = 0.23; P = 0.007) and diastolic (r = 0.23; P = 0.007) blood pressure. However, when those with and without CHD were compared only age (P < 0.0001), duration of diabetes (P < 0.001) and degree of microalbuminuria (P = 0.02) were significantly higher in patients with CHD. Leptin (P = 0.49), CRP (P = 0.19) and lipid parameters were not significantly different between the two groups. CONCLUSION: Our study confirms a relationship between leptin and CRP with CHD risk factors. The lack of significant difference when patients with and without CHD are compared may be due to the potential confounding effects of treatment with aspirin and statins.     

2型糖尿病合并冠心病危险因素分析

目的 分析２型糖尿病合并冠心病危险因素。方法 应用多因素Ｌｏｇｉｓｔｉｃ回归,分析了４０５例２型糖尿病患者有关冠心病的危险因素。结果 （１）２型糖尿病病人冠心病发生率为２６．２％;（２）年龄,糖尿病病程,高血压,体重指数,空腹血清Ｃ肽,甘油三酯,血清尿酸７个因素与Ⅱ型糖尿病病人冠心病发病有关。结论除了常见的冠心病危险因素外,为了防止２型糖尿病病人冠心病的发生,亦应注意控制高胰岛素血症,高甘油三酯血     

The relationship between fetuin-A and coronary atherosclerotic heart disease (CHD) and CHD-related risk factors: A retrospective study

Fetuin-A plays an important role in antivascular calcification and inflammatory response, it is necessary to explore the relationship between fetuin-A and coronary atherosclerotic heart disease (CHD) and CHD-related risk factors.A total of 92 patients with CHD as the research group, and 60 healthy persons as the control group were enrolled from May 2019 to May 2020. Fetuin-A levels were determined by enzyme-linked immunosorbent assay, and the characteristics and clinical data were collected and compared. Logistic regression was used to analyze the factors influencing CHD.The age, proportion of males, patients with hypertension and diabetes, as well as fetuin-A level in the research group were significantly higher than those in the control group, but the high-density lipoprotein cholesterol level was significantly lower than that in the control group (P < .05). Logistic regression analysis and correction showed that gender, age, blood pressure, and diabetes were related to the onset of CHD, and there was a significant correlation between the level of fetuin-A and age (P < .05).Serum fetuin-A was related to the onset risk of CHD, and showed a significant correlation with age.     

Non-traditional markers of atherosclerosis potentiate the risk of coronary heart disease in patients with type 2 diabetes and metabolic syndrome

Background and aimsThe aims of this study were to establish the prevalence of metabolic syndrome (MS), in type 2 diabetes mellitus (DM), according to National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) criteria, and to assess the association of MS with other cardiovascular (CV) risk factors in these patients.Methods and resultsA cross-sectional study was conducted in 1610 patients with type 2 DM. Glycated hemoglobin A1c (HbA1c), total cholesterol, low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C), uric acid, fibrinogen, creatinine, and albumin/creatinine ratios were measured. The risk of coronary heart disease (CHD) was calculated using the UKPDS Risk Engine.Seventy percent of the diabetic population met the criteria for MS; central obesity and hypertension were the most common criteria. Subjects with MS had higher levels of HbA1c, LDL-C, non-HDL-C, uric acid, and fibrinogen compared to patients without MS. Similarly, microalbuminuria and a high triglyceride (Tg)/HDL-C ratio (a marker of small LDL-C) occurred more frequently in patients with MS. When patients with no history of CHD events were considered, mean CHD risk was greater in those with, than those without, MS.ConclusionsMS is highly prevalent in type 2 DM and is commonly associated with non-traditional CV risk factors. The diagnosis of MS seems to confer additional CHD risk in patients with type 2 diabetes.     

2型糖尿病继发冠心病的机制及预防

2型糖尿病（type 2 diabetes mellitus,T2DM）是一种以血糖升高为基本特征的代谢紊乱性疾病,其导致的血管并发症显著增加了糖尿病患者的致残致死率,严重降低了患者的生活质量.国际糖尿病联盟发布最新数据显示,2011年全世界糖尿病患病人数已达3.66亿,较2010年的2.85亿增加近30%[1].中国20岁以上的成年人糖尿病患病率为9.7%,已跃居全球糖尿病第一大国[2].T2DM患者首要致死原因是心血管并发症,调查显示死于冠心病的T2DM患者高达65%～80%.鉴于T2DM继发冠心病的高危害,本文就T2DM继发冠心病的机制及预防进行简单论述.     

静息心率与冠心病发病危险因素聚集性的关联

本文探讨了静息心率与冠心病发病危险因素高血压、高纤维蛋白原血症、高甘油三酯血症、高血糖聚集性的关联。发现超重（ＢＭＩ≥２５）及（或）男＞４５岁，女＞５５岁人群，平均静息心率＞８８次／分钟组上述两个以上危险因素聚集发生机率较６０次／分钟组增加约５０％。多因素Ｌｏｇｉｓｔｉｃ回归分析表明，调整年龄、体重指数两混杂因素影响后，在心率＞８８次／分钟人群则这种危险性仍明显增加（ＯＲ＝４．３，９５％可信限２．１～８．７），提示在超重及较年长人群中心率可能是一个简单的冠心病危险因素聚集发生的临床标志。     

Coronary heart disease and urinary albumin excretion rate in Type 2 (non-insulin-dependent) diabetic patients

Summary Associations between overnight urinary albumin excretion rate and prevalent coronary heart disease and its major risk factors were examined in a cross-sectional study of 141 Type 2 (non-insulin-dependent) diabetic patients. Mean albumin excretion rate was higher in men (geometric mean 13.5 g/min; 95% confidence interval 10.3–17.6) than women (7.5 g/min; 5.7–9.8, p<0.01). In diabetic men and women mean albumin excretion rate was higher in those with electrocardiographic and/or symptomatic evidence of coronary heart disease than in those without (men, 23.1 g/ min; 95% confidence interval 13.7–39.0 versus 10.6 g/min; 7.9–14.2, p<0.01, women, 13.7 g/min; 8.0–23.5 versus 5.4 g/min; 4.2–6.8, p<0.01). Multiple logistic regression analysis was used to allow for confounding between variables. In the diabetic group as a whole, raised albumin excretion rate (p<0.001), gender (p<0.05) and systolic blood pressure (p=0.06) entered the best model for coronary heart disease prediction. In women, albumin excretion rate alone (p<0.01) and in men albumin excretion rate (p<0.01) and age (p=0.05) entered the best models. We conclude that albumin excretion rate is significantly associated with coronary heart disease morbidity after taking into account the confounding effects of raised blood pressure and other cardiovascular risk factors.     

Levels of cardiovascular risk factors in type 2 diabetes mellitus are dependent on the stage of proteinuria.

Levels of cardiovascular risk factors were determined in 75 patients with Type 2 diabetes mellitus. The patients were divided into three groups according to their urinary protein excretion (UPE): (a) normal proteinuria (less than or equal to 70 mg d-1); (b) microproteinuria (70-500 mg d-1); and (c) macroproteinuria (greater than 500 mg d-1). A significant stepwise increase in mean systolic blood pressure, LDL-cholesterol and fibrinogen levels was observed from the first to the third investigated group of patients. Mean apoprotein B levels were significantly increased in the group with macroproteinuria compared to the other two groups. Significant linear correlations were found between UPE and LDL-cholesterol, total cholesterol, apoprotein B, creatinine, systolic blood pressure and diabetes duration. In summary, it is concluded that the levels of some cardiovascular risk factors increase with the stage of proteinuria in Type 2 diabetes mellitus.     

Type 2 (non-insulin-dependent) diabetes mellitus and cardiovascular disease — putative association via common antecedents; further evidence from the whitehall study

Summary Fifteen year mortality rates are reported for men participating in the Whitehall Study in 1968–1970. Subjects were divided into four groups — normoglycaemic (centiles 1–95 of the blood glucose distribution: n=17,051), glucose intolerant (centiles 96–100: n = 999), newly diagnosed diabetic patients (n=56) and previously diagnosed diabetic patients (n=121) treated with diet±tablets. Relative risks for all causes mortality and from coronary and cardiovascular disease deaths were calculated. Age adjusted relative risks were highest in the newly diagnosed diabetic patients and were also increased in glucose intolerant and previously diagnosed diabetic men (p<0.05), but did not increase with increasing duration of diabetes. With adjustment for other risk factors, relative risks were similar in newly diagnosed and previously diagnosed diabetic men. There was no significant linear trend of adjusted relative risks with duration of diabetes when all diabetic men were pooled and person years at risk calculated. The lack of effect of duration upon relative risk together with other observations suggests common, possibly genetic, antecedents of both Type 2 (non-insulin-dependent) diabetes and coronary heart disease.     

Cardiovascular disease in type 2 diabetes: challenge for treatment and prevention

Type 2 diabetes increases the risk of cardiovascular disease (CVD) two- to fourfold compared with the risk in non-diabetic subjects. Although type 2 diabetes is associated with a clustering of risk factors (small, dense low-density lipoprotein [LDL] particles, low high-density lipoprotein [HDL] cholesterol, high triglycerides, elevated blood pressure, obesity, central obesity, hyperinsulinaemia, hyperglycaemia, etc.), the cause for an excess risk of CVD remains unknown. Recent drug treatment trials have indicated that the lowering of total and LDL cholesterol and blood pressure is similarly beneficial in diabetic and non-diabetic subjects. The treatment of hyperglycaemia reduces micro- and macrovascular complications in type 2 diabetic patients. Beta-blocking agents, angiotensin-converting enzyme inhibitors, aspirin, and thrombolytic therapy are also effective in the treatment of CVD amongst diabetic patients.