Diabetes and haemodynamic reactions to acute coronary occlusion

BACKGROUND: The risk of early sudden death before hospital admission is higher in diabetic than non-diabetic men with acute myocardial infarction and autonomic nervous activity may modify the clinical outcome of abrupt coronary occlusion. Since diabetes mellitus may interfere with autonomic and myocardial function, we decided to study whether diabetes alters autonomic and haemodynamic responses to acute coronary occlusion. METHODS: We analyzed the changes in heart rate, heart rate variability and blood pressure, and the occurrence of ventricular ectopy during a 2-min coronary occlusion in 238 non-diabetic and 32 diabetic patients referred for single vessel coronary angioplasty. The ranges of non-specific responses were determined by analyzing a control group of 19 patients with no ischaemia during a 2-min balloon inflation in a totally occluded coronary artery. RESULTS: Diabetic patients were more often (p<0.05) female, but there were no significant differences in the occluded vessel or incidence of ST changes or chest pain during coronary occlusion between the groups. Incidence of significant heart rate reactions and ventricular arrhythmias was comparable in both groups. Systolic blood pressure decreased (p=0.01) in the diabetic patients during coronary occlusion, but did not change significantly in the non-diabetic group. Coronary occlusion caused more often (34% vs. 14%, p<0.01) a significant decrease in blood pressure in diabetic patients. Logistic regression models developed to analyze the significance of diabetes while controlling for baseline variables and signs of ischaemia identified diabetes to be an independent predictor of hypotensive reactions (odds ratio [OR] 2.9, 95% confidence intervals 1.1-7.8, p<0.05), while female gender and high short-term heart rate variability were other independent predictors of hypotensive reactions. CONCLUSIONS: Diabetic patients often develop significant hypotension during the early phase of acute coronary occlusion. This abnormality may be related to diabetic cardiomyopathy and impairment of baroreflex-mediated regulation of circulation. Predisposition to hypotension may contribute to the observed differences in the clinical presentation and outcome of acute coronary events.     

Influence of diabetes mellitus on the clinical manifestations and prognosis of infective endocarditis: a report from the International Collaboration on Endocarditis-Merged Database

The purpose of this investigation was to study the influence of diabetes mellitus (DM) on outcomes of infective endocarditis (IE). Outcomes were compared between 150 diabetic and 905 non-diabetic patients with IE from the International Collaboration on Endocarditis Merged Database. Compared to non-diabetic patients, diabetic patients were older (median age 63 vs 57 y, p<0.001), were more often female (42.0% vs 31.9%, p=0.01), more often had comorbidities (41.5% vs 26.7%, p<0.001), and were more likely to be dialysis dependent (12.7% vs 4.0%, p<0.001). S. aureus was isolated more often (30.7% vs 21.7%, p=0.02), and microorganisms from the viridans Streptococcus group less often (16.7% vs 28.2%, p = 0.001) in the diabetic group. There was no difference with respect to the presence of congestive heart failure, embolism, intra-cardiac abscess, new valvular regurgitation, or valvular vegetation. Diabetic patients underwent surgical intervention less frequently (32.0% vs 44.9%, p = 0.003), and had higher overall in-hospital mortality (30.3% vs 18.6%, p = 0.001). On multivariable analysis, DM was an independent predictor of mortality (odds ratio (OR) = 1.71, 95% confidence interval (CI) 1.08-2.70), especially in male patients, as diabetic males had higher mortality than non-diabetic males (OR 2.18, CI 1.08-4.35). DM is an independent predictor of in-hospital mortality among patients hospitalized with IE.     

Underuse of evidence-based treatment modalities in diabetic patients with non-ST elevation acute coronary syndrome. A prospective nation wide study on acute coronary syndrome (FINACS)

This study was designed to evaluate how new treatment guidelines of acute coronary syndrome (ACS) without ST elevation have been implemented in clinical practice especially in diabetic patients. A prospective follow-up was performed on 501 consecutive patients with suspected ACS without ST elevation admitted to nine hospitals in Finland between 15 January and 11 March 2001. The study group included 143 (29%) diabetic patients. Their risk profile was more severe than in non-diabetic patients; ST-depression on admission electrocardiography 57 versus 38%; P<0.0001, elevated troponin levels 66 versus 56%; P<0.05. Six months composite incidence of death, new myocardial infarction (MI), refractory angina or readmission for unstable angina was 39% in diabetic patients and 20% in non-diabetic patients (P<0.0001). In spite of this more severe risk profile, glycoprotein (GP) IIb/IIIa receptor antagonists and statins were used with similar frequency in non-diabetic and diabetic patients (15 vs. 19 and 48 vs. 54%, respectively; P=NS for both). In diabetic patients mean delay for in hospital coronary angiography was longer (6.4 vs. 4.2 days, P<0.05) and it was performed less often (32 vs. 45% P<0.05). Our results show that diabetic patients with ACS have higher risk profile and worse outcome than non-diabetic patients. Despite their indisputable benefits in diabetic patients, statins, GP IIb/IIIa receptor antagonists and invasive strategy were underused or often neglected. Further education is needed to change attitudes and to better implement new guidelines into clinical practice.     

Impact of diabetes mellitus on long-term outcome after unstable angina and non-ST-segment elevation myocardial infarction treated with a very early invasive strategy

Aims/hypothesis We sought to evaluate the impact of diabetes mellitus on long-term outcome in patients with unstable angina and non-ST-segment elevation myocardial infarction treated with a very early invasive strategy.Methods We carried out a prospective cohort study in 270 diabetic and 1163 non-diabetic patients with unstable angina and non-ST-segment elevation myocardial infarction. All patients underwent coronary angiography and, if appropriate, subsequent revascularisation within 24 hours of admission. The primary endpoint was all-cause mortality during follow-up for up to 60 months.Results Diabetic patients had less favourable baseline characteristics including more advanced coronary artery disease and more severe unstable angina and non-ST-segment elevation myocardial infarction. Percutaneous coronary intervention was performed in 53% of diabetic patients and 56% of non-diabetic patients. Coronary artery bypass grafting was done in 21% of diabetic patients and 12% of non-diabetic patients. In-hospital mortality (4.1% vs 1.3%; hazard ratio 3.47; 95% CI: 1.57 to 7.64; p=0.002) and long-term mortality (9.7% vs 4.9%; hazard ratio 2.11; 95% CI: 1.33 to 3.36; p=0.002) were significantly higher in diabetic patients. After adjustment for differences in baseline characteristics, diabetes mellitus was no longer an independent predictor of long-term mortality (hazard ratio 1.43; 95% CI: 0.74 to 2.78; p=0.292).Conclusions/interpretation Diabetic patients treated with a very early invasive strategy for unstable angina and non-ST-segment elevation myocardial infarction have a higher in-hospital and long-term mortality that is largely explained by their less favourable baseline characteristics including more advanced coronary artery disease and more severe unstable angina and non-ST-segment elevation myocardial infarction.Abbreviations CK creatine phosphokinase - FRISC Fragmin and fast Revascularisation during InStability in Coronary artery disease - OASIS Organisation to Assess Strategies for Ischemic Syndromes - TACTICS-TIMI 18 Treat angina with Aggrastat and determine Cost of Therapy with an Invasive or Conservative Strategy—Thrombolysis In Myocardial Infarction 18 - UA/NSTEMI unstable angina and non-ST-segment elevation myocardial infarction     

Influence of diabetes mellitus on clinical outcomes across the spectrum of acute coronary syndromes. Findings from the GUSTO-IIb study. GUSTO IIb Investigators.

AIMS: We examined the characteristics, outcomes, and effects of hirudin vs heparin treatment of diabetic patients across the spectrum of acute coronary syndromes. METHODS AND RESULTS: We studied the 12,142 patients enrolled in the randomized GUSTO-IIb study. Diabetic patients (n=2175) were older, more often female, more often had prior cardiovascular disease, hypertension, and hyperlipidaemia, and less often were current smokers. Diabetic patients had a higher overall incidence of death or (re)infarction at 30 days (13.1% vs 8.5%, P=0.0001), whether they presented with ST-segment elevation (13.9% vs 9.9%, P=0.0017) or not (12.8% vs 7.8%, P=0.0001), and at 6 months (18.8% vs 11.4%, P=0.0001). Among diabetic patients, hirudin was associated with a tendency toward a lower risk of death or (re)infarction at 30 days (12.2% vs 13.9% with heparin) and 6 months (17.8% vs 20.2%). Diabetic patients had more major bleeding, stroke, heart failure, shock, atrioventricular block, and atrial arrhythmias, but no increased risk for ocular bleeding. CONCLUSIONS: Diabetic patients with acute coronary syndromes had worse 30-day and 6-month outcomes, particularly those without ST-segment elevation. The statistically non-significant trend toward improved outcomes with hirudin was similar among patients with and without diabetes, with a greater point estimate for the absolute difference in patients with diabetes.     

糖尿病合并非ST段抬高急性冠状动脉综合征患者的临床特点、治疗及远期预后

目的 了解糖尿病合并非ST段抬高急性冠状动脉综合征(ACS)患者的临床特点、治疗及远期预后.方法 在我国北方38个中心连续入选因非ST段抬高ACS住院的患者,记录既往病史、入院情况、住院期间主要治疗和心血管事件,并在发病6、12和24个月对所有患者进行随访.采用Kaplan-Meier牛存分析比较糖尿病和非糖尿病患者2年累计事件发生率,Cox回归多因素分析用于2年累计死亡影响因素的识别.结果 共注册非ST段抬高ACS住院患者2294例,其中已知糖尿病患者420例,占18.3%.平均年龄(64.9±6.7)岁,高于非糖尿病患者的(62.3±8.6)岁(P<0.01),女性患者(占48.1%)、既往有高血压病、心肌梗死、心力衰竭、卒中者均多于非糖尿病患者.合并糖尿病患者住院期间抗血小板约物的应用(92.1%比95.0%,P<0.05)、接受冠状动脉造影(30.0%比36.3%,P<0.05)和冠状动脉介入治疗(12.1%比18.8%,P<0.05)的患者少于非糖尿病者.住院期间以及2年累计的死亡、慢性心力衰竭以及心肌梗死、卒中、心力衰竭和死亡的联合终点事件发生率均明显高于非糖尿病者.多因素回归分析显示,年龄≥70岁、糖尿病、既往心肌梗死、既往心力衰竭、就诊时收缩压<90 mm Hg(1 mm Hg=0.133 kPa)和心率>100次/min是非ST段抬高ACS患者2年死亡的危险因素.结论 合并糖尿病的非ST段抬高ACS患者住院期间和2年死亡、慢性心力衰竭和联合终点事件发牛率明显高于非糖尿病者.糖尿病是非ST段抬高ACS患者2年死亡的独立危险因素.我国非ST段抬高ACS患者住院期间抗血小板治疗和早期介入检杳和治疗有待加强.有必要进行更有针对性的大规模临床研究,以提高糖尿病并发ACS的治疗水平,改善该人群的预后.

Abstract：

Objective To observe the clinical characteristics,treatment options and outcome of diabetic patients with non-ST elevation acute coronary syndromes(NSTEACS).Methods Consecutive patients admitted with NSTEACS from 38 centers in north China were enrolled.Medical histories,clinical characteristics,treatments and outcomes were evaluated and follow-up was made at 6,12,and 24 months 'after their initial hospital admission.Cumulative event rates were compared between diabetic and nondiabetic patients.Results There were 420 diabetic patients out of 2294 NSTEACS patients(18.3%).Diabetic patients were older[(64.9±6.7)years vs.(62.3±8.6)years,P<0.01],more often women (48.1% vs.35.3%,P<0.05)and were associated with higher baseline comorbidities such as previous hypertension,myocardial infarction,congestive heart failure and stroke than non-diabetic patients.The incidence of antiplatelet therapy(92.1% vs.95.O%,P<0.05),coronary angiography(30.0% vs.36.3%,P<0.05)and revascularization(12.1% vs.18.8%,P<0.05)was lower in patients with diabetes than non-diabetic patients.In hospital and 2-year mortality as well as the incidence of congestive heart failure and composite outcomes of myocardial infarction,stroke,congestive heart failure and death were substantially higher in diabetic patients compared with non-diabetic patients.Muhivariative Cox regression analysis revealed that age≥70 years,diabetes,previous myocardial infarction,previous congestive heart failure,systolic blood pressure less than 90 mm Hg(1 mm Hg=0.133 kPa)and heart rate more than 100bpm at admission were risk factors for 2-year death.Conclusion In NSTEACS,diabetes is associated with higher rate of in-hospital and 2-year death,congestive heart failure and composite outcomes of myocardial infarction,stroke,congestive heart failure and death.Diabetes mellitus is a major independent predictor of 2-year mortaliy post NSTEACS.Status of antiplatelet therapy,coronary angiography and revascularization should be improved for diabetic patients with NSTEACS during hospitalization.     

Coronary atherosclerosis in Type II diabetes: angiographic findings and clinical outcome

Aims/hypothesis. Prevalence and incidence of coronary heart disease (CHD) are increased in patients with Type II (non-insulin-dependent) diabetes mellitus; whether this is entirely due to more extensive coronary atherosclerosis is, however, controversial. Methods. We analysed the clinical, angiographic and follow-up data of 2253 consecutive patients undergoing coronary angiography over the decade 1983–1992. Results. Abnormal coronary arteries (≥ 50 % stenosis) were found more frequently in diabetic than in non-diabetic subjects (85 vs 67 %, p < 0.0001), the excess being explained by a higher prevalence of three-vessel disease (36 vs 17 %, p < 0.0001). The sum of all angiographically detectable lumen stenoses (atherosclerosis score, ATS) was higher in diabetic than in non-diabetic subjects (352 ± 232 vs 211 ± 201 units, p < 0.0001). After adjusting for measured cardiovascular risk factors, diabetes was still associated with an excess ATS (114 units in men and 187 units in women, p < 0.0001 for both, p < 0.03 for the interaction ATS x sex). Within the diabetic group, the only variable that was independently (of sex and age) associated with ATS was serum cholesterol, whereas plasma glucose concentration, disease duration and type of treatment were not correlated with the severity of coronary atherosclerosis. In contrast, clinical grade proteinuria was not associated with a more diffuse coronary atherosclerosis either in diabetic (366 ± 243 vs 354 ± 233 units) or non-diabetic subjects (231 ± 201 vs 207 ± 197 units). Over a mean follow-up period of 88 months, 19 % of diabetic patients compared with 10 % of non-diabetic patients died of a cardiac cause (age and sex-adjusted odds ratio OR = 1.34 [1.14–1.57]). In a Cox model adjusting for age, sex and all major risk factors, diabetes was still associated with a significant excess risk of dying of a cardiac cause (OR = 1.37 [1.14–1.60]); this excess was similar to, and independent of, that carried by the presence of prior myocardial infarction in the whole population (OR = 1.42 [1.25–1.62]). Proteinuria was associated with a higher risk of cardiac death, particularly in diabetic patients, independently of coronary atherosclerosis (adjusted OR = 1.46 [1.03–1.99]). Conclusion/interpretation. In patients undergoing angiography, diabetes, especially in women, is associated with more severe and diffuse coronary atherosclerosis which is not explained by either the traditional risk factors or the presence of proteinuria. On follow-up, these patients experience an excess of cardiac deaths, to which coronary atherosclerosis and proteinuria make independent, quantitative contributions. [Diabetologia (2000) 43: 632–641] Received: 13 December 1999 and in revised form: 7 March 2000     

糖尿病患者CT冠状动脉造影的诊断价值

目的通过对比观察糖尿病与非糖尿病患者CT冠状动脉造影（CTCA）的特征,探讨CTCA在糖尿病合并冠心病患者中的诊断价值。方法对380例糖尿病患者及481例非糖尿病患者进行CTCA检查,其中111例患者（糖尿病41例,非糖尿病70例）行选择性冠状动脉造影检查,观察CTCA与选择性冠状动脉造影的相关性,并比较糖尿病与非糖尿病患者冠状动脉病变的特征。结果糖尿病与非糖尿病患者中CTCA检查与选择性冠状动脉造影均相关良好,糖尿病患者血管狭窄发病率较非糖尿病患者显著增高（45．8％ vs 24．5％;P〈0．05）,多支病变发病率明显增高（P〈0．05）。结论糖尿病患者冠状动脉病变特征复杂,CTCA在糖尿病患者冠心病的筛查中具有重要意义。     

Primary percutaneous coronary interventions in acute myocardial infarction in diabetic versus non-diabetic patients. In-hospital and long-term results

BACKGROUND. It has been well established that in the pre-thrombolytic era diabetic patients had poorer clinical outcome after acute myocardial infarction (AMI) compared to non-diabetic patients. Less is known about the impact of diabetes on early and late clinical outcomes in patients with AMI undergoing primary percutaneous coronary interventions (PCI). AIM. To compare the in-hospital and long-term clinical outcomes of AMI patients with and without diabetes. METHODS. Seven hundred seventy-four patients who underwent primary PCI for AMI in our institution between 1997 and 2001 were included in the study. We compared the angiographic and clinical outcomes of 633 (81.8%) non-diabetic (aged 55.9+/-10.6 years; 82.6% male) and 141 (18.2%) diabetic (aged 56.8+/-11.7 years; 63.1% male) patients. RESULTS. Diabetic patients had a higher incidence of hypertension, hyperlipidemia, and unstable hemodynamic status compared to non-diabetic patients (p=0.001, 0.003, 0.001, respectively). Smoking and male gender rates were significantly more frequent in non-diabetic patients (p=0.001, 0.001, respectively). Angiographic success and prominent clinical improvement were achieved in 96.4% and 90.7% of diabetics vs 96.7% and 95.1% of non-diabetics (p=NS and 0.04, respectively). Diabetic patients had a higher incidence of in-hospital deaths and overall events (p=0.028). At one-month follow-up, diabetic patients required more target vessel revascularisation (5.6% vs 1.6%; p=0.006), which accounted for the majority of major cardiac events at one month (20.6% vs 7.4%; p=0.003). At a mean follow-up of 7.2+/-2.7 months, 92.9% of non-diabetic and 88% of diabetic patients were still alive (p=0.05). Overall survival without any major cardiac event (death, new MI or target vessel revascularisation) at 7.2+/-2.7 month follow-up was 75.8% for non-diabetics and 58.1% for diabetic patients (p<0.01). In the multivariate analysis age, diabetes, shock, hemodynamic instability and female gender were the most important predictors for the development of early and late major cardiovascular events. CONCLUSIONS. Primary PCI in acute MI is effective in restoring TIMI 3 coronary flow both in diabetic and non-diabetic patients. This procedure may reduce mortality in both groups, particularly in diabetic patients in whom this benefit is more prominent compared to thrombolytic therapy. Nevertheless, early and long-term event rates are significantly higher in diabetics than in non-diabetic patients.     

冠心病合并2型糖尿病病人冠状动脉造影分析

目的观察冠心病合并2型糖尿病病人的冠状动脉病变特征.方法对155例冠心病病人进行回顾性分析,对合并糖尿病者及无糖尿病者的冠状动脉病变进行比较.结果冠心病合并2型糖尿病组与非糖尿病组相比,病变血管支数比率高(76.5%vs 55.5%,P<0.01),多支血管病变(85.1%vs 45.7%,P<0.01)、弥漫性病变(11.3%vs 3.8%,P<0.05)及左主干病变(22.2%vs 7.0%,P<0.05)发生率高;相关性分析显示冠状动脉血管病变支数与糖尿病的病程呈正相关.结论冠心病合并2型糖尿病病人多支病变、弥漫性病变、左主干病变比例高,血管受累支数多.     

Long-term outcome of coronary balloon angioplasty in diabetic patients

Diabetes is recognised to increase morbidity and mortality after coronary revascularization. We compared clinical outcomes in mean 5-year-long follow-up of coronary balloon angioplasty in diabetic and non-diabetic patients. We studied 621 patients undergoing elective angioplasty from 1987 to 1996. There were 60 (9.7%) patients with diabetes who were compared with 561 non-diabetic patients. Diabetics were older, more often obese, less frequently were current smokers, and less frequently had hypercholesterolaemia. Diabetic patients in comparison with non-diabetics had lower ejection fraction and more frequently had angioplasty of complex (B2 or C) lesions, but there were no differences between both groups in the other clinical and angiographic risk factors. Clinical success of angioplasty, as well as complications rate were similar in both groups. In follow-up restenosis occurred more frequently in diabetics (46.3 vs. 32.2%, P=0.03), resulting in significantly higher re-intervention rate (50.0 vs. 35.4%, P=0.03). Especially diabetic patients were more frequently referred to CABG (20.4 vs. 9. 9%, P=0.02). There were no significant differences in deaths (1.9 vs. 2.8%) and myocardial infarction (3.7 vs. 4.4%). Diabetics presented worse CCS status at the end of observation (Class 0 and I - 61.1 vs. 74.4%, P=0.037). Angioplasty proved to be a safe procedure in diabetic patients. Despite higher restenosis and re-intervention rate in diabetics, mortality as well as myocardial infarction rate was the same in both groups during mean 5-year follow-up.     

Prognostic significance of diabetes in acute myocardial infarction. Are the differences linked to female gender?

A prospective study of acute myocardial infarction was carried out in 1239 patients in order to assess both the prognostic significance of diabetes mellitus and the clinical characteristics associated with age and gender. Diabetes mellitus (DM) was found in 386 cases, often associated with old age, female gender, and more prevalent history of angina, heart failure, and hypertension. DM patients were admitted later and they were less likely to receive thrombolytic therapy, 47.9 vs. 58.1% (P<0.001). Complications more often associated with DM were: heart failure, 45 vs. 24.5% (P<0.01), and early, in-hospital and 1-year mortalities, 7.2 vs. 3.9% (P<0.05), 17.6 vs. 9.1% (P<0.001), and 29.2 vs. 16.2% (P<0.001), respectively. Compared with diabetic men, diabetic women were older and had a more prevalent history of hypertension and congestive heart failure. Diabetic women also had a higher rate of heart failure during hospitalisation, and of mortality, than diabetic men: early: 11.7 vs. 4.5% (P<0.01); in-hospital: 29.6 vs. 10.3% (P<0.001); and 1-year: 42.7 vs. 21.1% (P>0.001). DM was not selected by the multivariate analysis as a variable with independent prognostic value for mortality. In separate multivariate analysis for diabetic and non-diabetic patients, female gender had independent prognostic value for mortality only in the case of the diabetic population.     

Plasma levels of endothelin, lipid peroxides and prostacyclin in diabetic patients with macroangiopathy

To assess the efficacy and safety of lower extremity arterial reconstruction in diabetic and non-diabetic subjects during a 3-year period. A prospective clinic-based study between 1994-1999 in Area 7, Madrid, with a population of 569307 and an estimated diabetic population of 37932 (15505 men and 22427 women). The level of arterial reconstruction and associated risk factors were ascertained. Results: A total of 588 peripheral revascularization surgical procedures were performed in 481 patients. The diabetic patients (n=174, 36.2%) underwent 222 surgical procedures (including 48 follow-on operations, 21.6%), and 307 non-diabetic subjects underwent 366 surgical procedures (59 follow-on operations, 16.1%). The numbers of surgical procedures per 100000 people at risk and year were 18.8 and 1.8 for non-diabetic men and women, respectively, and 145.1 and 29.0 for men and women with diabetes mellitus (7.7- and 16.2-fold, respectively). Age at reconstruction surgery was 2 and 5 years earlier in non-diabetic than in diabetic men and women, respectively. Diabetic patients had a higher neuropathy score (P<0.05) and were less frequently smokers (P<0.05) than non-diabetic subjects. Diabetic subjects more frequently had distal reconstruction while proximal arterial reconstruction was more often performed in non-diabetic subjects. Between 64.6 and 80.4% of people with diabetes and 82.3 and 88.9% of non-diabetic subjects had no complications during their in-hospital stay. Distal amputation simultaneous to arterial reconstruction was the most frequent morbidity of people with diabetes during the study (P<0.05). Despite a graft occlusion rate after femoropopliteal revascularization significantly higher than in non-diabetic people (P<0.05), diabetic people more often required lower extremity amputations (LEAs) for the same level of bypass (P<0.01). Cumulative limb salvage rates were lower in diabetic patients than in non-diabetic subjects at femoropopliteal (49.2 vs. 89.7%; P<0.001), femorodistal (73.5 vs. 95.2%; P<0.01), and distal reverse (77.9 vs. 87.3%; P<0.05) arterial reconstruction, at the end of the third year, but similar after aorto-iliac reconstruction (93.1 vs. 97.5%). A higher neuropathy score and the presence of foot ulcers were associated to significantly lower limb salvage in diabetic patients (P<0.05), but not in non-diabetic people. Survival rates after 3 years were similar between diabetic and non-diabetic populations after aorto-iliac (93.1 vs. 97.5%), femoropopliteal (97.2 vs. 90.3%), and distal reverse (93.2 vs. 98.1%) revascularization, and slightly lower in diabetic compared to non-diabetic patients after femorodistal revascularization (82.1 vs. 96.3%; P<0.05). Conclusion: Although limb salvage after arterial reconstruction is lower in diabetic than in non-diabetic subjects, particularly in those with a higher neuropathy score, this surgical approach can be applied in both diabetic and non-diabetic subjects with otherwise similar outcome.     

Impact of a history of diabetes on the improvement of symptoms and quality of life during 5 years after coronary artery bypass grafting

To describe the impact of a history of diabetes mellitus on the improvement of symptoms and various aspects of quality of life (QoL) during 5 years after coronary artery bypass grafting (CABG). Patients who underwent CABG between 1988 and 1991 in western Sweden were approached with an inquiry prior to surgery and 5 years after the operation. QoL was estimated with three different instruments: Physical Activity Score (PAS), Nottingham Health Profile (NHP) and Psychological General Well-Being (PGWB) index. 876 patients participated in the evaluation, of whom 87 (10%) had a history of diabetes. Symptoms of dyspnea and chest pain improved both in diabetic and non-diabetic patients. Diabetic patients scored worse than non-diabetic patients both prior to and 5 years after CABG, but without any major difference in improvement between the two groups with all three measures of QoL. PAS tended to improve more in non-diabetic than in diabetic patients, whereas improvement in NHP and PGWB was similar regardless of a history of diabetes. Diabetic patients differ from non-diabetic patients having an inferior QoL both prior to and 5 years after CABG. Both diabetic and non-diabetic patients improve in symptoms and QoL after the operation.

In some aspects improvement tended to be less marked in the diabetic patients but on the whole improvement was similar compared to non-diabetic patients.     

Coronary anatomy and left ventricular ejection fraction in patients with type 2 diabetes admitted for elective coronary angiography

Patients with diabetes mellitus (DM) have more severe coronary artery disease and a two‐ to fourfold higher risk for myocardial infarction and death as compared to patients without DM. In this study, we analyzed coronary anatomy, left ventricular ejection fraction, and cardiac risk factors in patients with DM referred for coronary angiography and compared them with findings in nondiabetic patients. Coronary anatomy was assessed in a total of 6,234 patients and left ventricular ejection fraction in a subset of 4,767 (76.5%) patients. Diabetic patients (n = 641) were older (60.8 ± 9.6 vs. 58.5 ± 10.5 years; P < 0.0001) and had higher rates of hypertension (65% vs. 47%; P < 0.0001). Three‐vessel disease (DM 44.7% vs. no DM 25.4%; P < 0.0001) and reduced left ventricular ejection fraction (DM 58.4% ± 15.2 vs. no DM 63.9% ± 13.2; P < 0.0001) were significantly associated with DM. After adjustment for age and other vascular risk factors, the presence of DM was associated with a higher atherosclerotic burden. We conclude that advanced coronary heart disease and left ventricular dysfunction are highly prevalent in diabetic patients, independent of age and other cardiovascular risk factors. Thus, cardiac assessment in diabetic patients should, in addition to optimal diabetic control, involve screening for left ventricular dysfunction. Cathet Cardiovasc Intervent 2004;62:432–468. © 2004 Wiley‐Liss, Inc.     

Outcome of Unstable Angina in Patients with Diabetes Mellitus

This prospective hospital-based, case–control study compares the outcome of unstable angina in non-insulin dependent diabetic patients and non-diabetic control subjects. One hundred and sixty-two diabetic patients and 162 non-diabetic control patients with unstable angina were entered into the study. The 3-month mortality was 8.6 % (95 % confidence interval, CI = 4.4–12.9 %) in diabetic patients and 2.5 % (CI = 0.1–4.9 %) in control patients (p = 0.014). The 1-year mortality was 16.7 % (CI = 10.9 %–22.4 %) in diabetic patients and 8.6 % (CI = 4.4 %–12.9 %) in non-diabetic patients (p = 0.029). Diabetic patients received beta-blockade and underwent coronary angiography and angioplasty less frequently than controls; the frequency of unstable angina, of acute myocardial infarction, and of coronary artery bypass grafting was similar in both groups at 1 year of follow-up. It is concluded that diabetic patients with unstable angina have a higher mortality than non-diabetic patients and that this difference is largely accounted for by early (first 3 months) mortality. © 1997 by John Wiley & Sons, Ltd.     

Influence of diabetes mellitus on the prognosis of non-ST-elevation acute coronary syndromes

Aim of studyAnalyze the influence of diabetes mellitus on the prognosis, at short and middle term of patients with non-ST-segment-elevation acute coronary syndrome.Patients and methodWe conducted a retrospective review of 308 consecutive medical records of patients admitted to the care unit of our department with a non-ST-segment-elevation acute coronary syndrome. One hundred and fifty-six patients were diabetics (group 1) and 152 were not (group 2). We compared the demographic, clinical, angiographic and therapeutic characteristics of the two groups and we analyzed the prognosis of diabetic and non-diabetic patients at short term (30 days) and at middle term (average: 28 months; extreme: 12 months, 72 months).ResultsThe mean age was similar into both groups (60.8 years). Diabetic patients were more often women (42.1% vs 23.1%) and presented a higher prevalence of systemic hypertension, dyslipidemia and family history of coronary artery disease. Smoking was more frequent in group 2. The rates of coronary angiography, percutaneous transluminal coronary angioplasty, and coronary bypass surgery were similar in the two groups. At 30 days, diabetic patients were at increased risk for acute heart failure (19.1% vs 6.4%) and for major cardiac events (12.5% vs 6.4%). A pejorative prognosis was also observed at middle term among diabetic patients. They were at greater risk for readmissions for non-ST-segment-elevation acute coronary syndrome (42% vs 25%), for major cardiac events (49.3% vs 31.6%) and for new revascularizations (17.3% vs 7.2%). In a Cox multivariate analysis, diabetes mellitus remains an independent risk factor for major cardiac events at middle term.ConclusionOur study confirms the pejorative prognosis of acute coronary syndromes without ST elevation at short and middle term in diabetic patients.     

Hospital outcome of acute myocardial infarction in patients with and without diabetes mellitus.

AIMS: To assess hospital mortality and morbidity in diabetic and non-diabetic patients with acute myocardial infarction and to compare the results between the two groups. METHODS: All patients admitted in 1999 to the intensive care unit of the Schwabing City Hospital with diagnosis of acute myocardial infarction were assessed for hospital mortality and co-morbidity. RESULTS: Three hundred and thirty patients with acute myocardial infarction were admitted. Of those, 126 (38%) were diabetic and 204 (62%) were non-diabetic patients. Mortality within 24 h after admission was 13.5% in diabetic patients and 5.4% in non-diabetic patients (P<0.01). Mortality during entire hospitalization was higher in diabetic than in non-diabetic patients (29.4% vs. 16.2%; P=0.004). Diabetic patients were resuscitated more frequently than non-diabetic patients (24% vs. 11%, P<0.01). In diabetic patients, heart rate at admission was increased (91 +/- 27 vs. 82 +/- 23/min; P<0.01) and presence of angina pectoris was reported less frequently (59% (n=72) vs. 82% (n=167); P<0.001). Preceding myocardial infarction, microalbuminuria, peripheral artery disease and arterial hypertension were more frequent in diabetic than in non-diabetic patients. Diabetic patients demonstrated higher C-reactive protein (CRP) levels than non-diabetic patients (91.4 +/- 78.2 mg/l vs. 45.2 +/- 62.4 mg/l; P<0.001). CONCLUSIONS: In diabetic patients with acute myocardial infarction, early hospital mortality is increased and signs of cardiac autonomic dysfunction and microangiopathy are detected more frequently than in non-diabetic patients. The need for advanced treatment strategies early in the course of diabetic patients with myocardial infarction is emphasized.     

Coronary revascularization improves long-term prognosis in diabetic and nondiabetic end-stage renal disease.

To test the hypothesis that coronary revascularization improves long-term prognosis in patients with hemodialysis, 80 of 121 patients (66%) on maintenance hemodialysis who had undergone initial coronary angiography had bypass surgery, catheter angioplasty, or both between 1983 and 1999. Multivessel disease was more frequent (p=0.01) and the duration of hemodialysis therapy was shorter (p=0.01) in patients with diabetes (n=61), than in nondiabetic patients (n=60). Of the patients who underwent revascularization, complete revascularization was achieved in 75% of those with diabetic nephropathy (30/40) and 83% in a similar number of nondiabetic patients (33/40). The 5-year survival rate from initiation of hemodialysis was 79% in diabetic and 96% in non-diabetic patients (p<0.01), exceeding published Japanese (53% vs 70%) and US (26% vs 60%) survival rates. When survival was studied from the date of revascularization, predictors of outcome were age and achievement of complete revascularization. Surprisingly, diabetes was not a predictor of survival outcome. Complete revascularization improves long-term survival in both diabetic and nondiabetic patients.     

Evaluation of patients referred for possible coronary revascularization among patients with and without a history of hypertension. Swedish Coronary Artery Revascularization/Swedish Council on Technology Assessment in Health Care (SECOR/SBU) Project Group

Patients with and without a history of hypertension referred for eventual coronary revascularization were compared on the basis of a national survey including previous history, indications for coronary angiography, use of medication, findings at exercise test and cardioangiography, and long-term prognosis. As part of a national study of the appropriateness of coronary revascularization, data were prospectively collected on patients referred for possible coronary revascularization to 7/8 public Swedish heart centers that performed approximately 92% of all bypass operations in Sweden in 1994. The study included 2764 patients of whom 986 (36%) had a history of hypertension. Indications for coronary angiography were similar in patients with and without a history of hypertension. Triple therapy (a combination of beta-blockers, long-acting nitrates and calcium channel-blockers) was more frequently used among patients with hypertension (32.6% as compared with 21.4% among patients without hypertension; p < 0.001). With the exception of ST depression > 6 min after discontinuation of exercise test, which was more frequent among hypertensive patients (30.9% vs 25.7%; p < 0.05), the various indicators of myocardial ischemia were similar in the two groups during exercise. Patients with hypertension had a somewhat lower exercise capacity (mean of 109.6 w) than patients without hypertension (113.7; p < 0.05). The extent of coronary artery disease was more severe among hypertensives (p < 0.001). Overall mortality during the subsequent 21 months was 5.6% for patients with hypertension and 3.1% for patients without hypertension (p < 0.01). This was caused mainly by a difference in cardiovascular mortality (3.9% vs 2.5%; p < 0.05) and cerebrovascular mortality (1.0% vs 0.3%; p < 0.05). Among patients referred for possible coronary revascularization, those with a history of hypertension differed from those without such a history, in that they more frequently had ST depression at exercise test, a lower exercise capacity, more severe coronary artery disease, a higher frequency of triple-therapy use and a higher mortality rate.