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Risk factors for ischaemic heart disease: the prospective phase of the British Regional Heart Study.

Risk factors for major ischaemic heart disease (acute myocardial infarction or sudden death) have been investigated in a prospective study of 7735 men aged 40-59 years drawn from general practices in 24 British towns. After a mean follow-up of 4.2 years, there have been 202 cases of major ischaemic heart disease. Univariate estimates of the risk of ischaemic heart disease show that serum total cholesterol, HDL-cholesterol and triglyceride concentrations, systolic and diastolic blood pressures, cigarette smoking, and body mass index are all associated with increased risk of ischaemic heart disease. Evidence of ischaemic heart disease at initial examination is also strongly associated with increased risk of subsequent ischaemic heart disease. All these factors were then considered simultaneously using multiple logistic models. Definite myocardial infarction on electrocardiogram and recall of a doctor diagnosis of ischaemic heart disease remained predictive of subsequent major ischaemic heart disease, after allowance for all other risk factors. Serum total cholesterol, blood pressure, and cigarette smoking each remained as highly significant independent risk factors whereas overweight, above average levels of HDL-cholesterol and serum triglyceride were not predictive of risk after allowance for the above factors. Men with and without pre-existing ischaemic heart disease were examined separately in the same way (using multiple logistic models). The strength of association between the principal risk factors and subsequent major ischaemic heart disease was reduced in the men with pre-existing ischaemic heart disease, only age and serum total cholesterol remaining highly significant. Overall the levels of the major risk factors commonly encountered in British men have a marked effect on the risk of ischaemic heart disease. Modification of these risk factors in the general population constitutes an important national priority.

Adult↗

Association of diagnosis of ischaemic heart disease, diabetes mellitus and heart failure with cognitive function in the elderly population.

OBJECTIVE: The aim of this study was to describe the association between ischaemic heart disease (IHD), diabetes mellitus (DM) and heart failure (HF) and the prevalence of cognitive impairment. METHODS: In a cross-sectional, community-based study in Karlskrona, Sweden, 1402 participants of the Swedish National Study on Ageing and Care (60-96 y) underwent a medical examination and psychological testing including the Mini Mental State Examination (MMSE). Of these, 58% stated that they were treated for hypertension, IHD, DM or HF, or had ECG abnormalities (positive screen). RESULTS: The prevalence of cognitive impairment (MMSE score < 24) in patients treated for IHD, DM or HF was 28.5% compared to 16.1% in the population with a negative screen without cardiovascular disease or DM. After stratification by age, the difference was seen to be due to a higher prevalence of cognitive impairment in the age group 70-79 y, where 68.8% of the cognitively impaired came from the group treated for IHD, DM or HF. The odds ratio for cognitive impairment in this age group was 4.4 (95% CI 1.7-11.4), when compared to those with a negative screen as baseline. CONCLUSION: This study has shown that the patient group treated for IHD, DM or HF has a higher prevalence of cognitive impairment and a higher risk of developing early cognitive impairment between the ages of 70 and 79 y. Although this study has not provided conclusive evidence that cardiovascular disease and DM are associated with the early development of cognitive impairment, it provides incentive for further studies.

Age Factors↗

[Prevention of ischemic heart disease. Testing of three different methods for prediction of the risk of developing ischemic heart disease].

INTRODUCTION: The purpose of this evaluation was to compare estimation of risk of IHD, according to PRECARD and guidelines from DSAM and DCS. MATERIAL AND METHOD: The evaluation was performed in a general practice setting with relatively few elderly patients. Fifty consecutive patients were evaluated, 29 men and 21 women. Thirty-four patients were evaluated according to the physician's assessment and 16 according to the wishes of the patients. RESULTS: Four persons with definite ischaemic heart disease were included. According to DSAM, a further eight persons were found to have a > 20% risk of developing IHD. According to DCS, ten persons and to PRECARD three persons had a > 20% risk. DISCUSSION: Evaluation with PRECARD gives a more precise estimation than do DSAM and DCS. PRECARD uses the same risk factors as DSAM and DCS, but the HDL level and height/weight are also included. In addition, PRECARD estimates the risk of AMI, stroke, and fatal events, as well as the most important risk factors. PRECARD is recommended for use in general practice.

Adult↗

[Pulmonary hypertension associated with congenital heart disease].

INTRODUCTION: Congenital heart diseases are among the most common congenital malformations at birth with an incidence of 8/1,000 live births. These defects are characterized by a heterogeneous group of abnormal defects and connections between the cardiac chambers and vessels with different haemodynamic consequences and hence, varying need for follow-up and interventions. The most common forms are congenital cardiac shunts (i.e.: ventricular septal defects, atrial septal defects, patent ductus arteriosus) that account for almost 60% of the malformations. STATE OF THE ART: Pulmonary hypertension remains a major complicating factor of many types of congenital heart disease characterized by a systemic to pulmonary shunt either by causing increased morbidity and mortality during or immediately after surgical repair, or even preventing complete repair for those with advanced pulmonary vascular disease. Similarities in histological lesions between congenital heart disease and idiopathic pulmonary arterial hypertension suggest similarities in pathobiological pathways and thus pulmonary arterial hypertension associated with congenital cardiac shunt has been classified in the group 1 of the classification of Venice. Even if these complex mechanisms are not completely elucidated, the role of hemodynamics (shear stress) in the development of pulmonary vascular disease has been clearly demonstrated. PERSPECTIVES AND CONCLUSION: Until recently, patients with advanced pulmonary vascular disease following congenital systemic to pulmonary shunt had no specific treatment and were managed empirically. Because of the similarities with idiopathic pulmonary arterial hypertension the use of novel therapies suggest new therapeutic possibilities for these patients. Randomized controlled trials are definitely needed to evaluate the safety and efficacy of these therapies in this very particular group of patients, both in the short and long term.

Ductus Arteriosus, Patent↗

Brain natriuretic peptide concentration in dogs with heart disease and congestive heart failure.

Plasma brain natriuretic peptide concentration ([BNP]) is high in humans with cardiac disease and is further increased with congestive heart failure (CHF). The hypotheses of this study were that dogs with moderate to severe mitral regurgitation due to myxomatous mitral valve disease (MVD) would have increased plasma [BNP] compared to normal dogs, that plasma [BNP] would be higher in dogs with CHP, and that plasma [BNP] would predict premature death from cardiovascular disease. The study population consisted of 34 dogs: 9 normal dogs and 25 dogs with MVD. Patients were divided into 4 groups: group 1-10 dogs with moderate to severe MVD and no radiographic evidence of CHF; group II--6 dogs with severe MVD and mild CHF; group III--7 dogs with severe MVD and moderate CHF; and group IV--2 dogs with severe MVD and severe CHF. Diagnostic tests included thoracic radiographs, an echocardiogram, a serum chemistry profile, and the measurement of plasma [BNP] by a canine-specific radioimmunoassay. There was a significant positive correlation between the plasma [BNP] and heart disease/failure groups (P = .0036). Plasma [BNP] increased with progressively increasing severity of MVD and CHE Group I dogs had higher plasma [BNP] than did control dogs (P < .0001), and plasma [BNP] was higher in dogs with CHF (groups II-IV versus group I; P = .012). Plasma [BNP] was also weakly positively correlated with left atrial size (r = 0.43, P = .04). For every 10-pg/mL increase in plasma [BNP], the mortality rate over 4 months' time increased approximately 44%.

Animals↗

Maternal Lyme disease and congenital heart disease: A case-control study in an endemic area.

OBJECTIVE: The purpose of this study was to determine whether maternal Lyme disease increases the risk of congenital heart defect. STUDY DESIGN: This retrospective case-control study was carried out at a medical center in a suburban area where Lyme disease is endemic. Case patients comprised 796 children with a diagnosis of congenital cardiac anomaly. Control subjects comprised 704 children without cardiac defects selected from the records of the same pediatric cardiology service. Maternal histories were obtained through a mailed questionnaire survey. Unconditional logistic regression analyses examined the relationship between a history of preconception and prenatal clinical Lyme disease or tick bite and case or control status. RESULTS: There was no association between congenital heart defect and maternal tick bite (adjusted odds ratio 1.1, 95% confidence interval 0.5-2.5) or maternal Lyme disease within 3 months of conception or during pregnancy (adjusted odds ratio 0.9; 95% confidence interval 0.2-3.6). CONCLUSION: A woman who has been bitten by a tick or is treated for Lyme disease during or before pregnancy is not at increased risk for giving birth to a child with a congenital heart defect.

Adult↗

The spectrum of adult congenital heart disease in Europe: morbidity and mortality in a 5 year follow-up period. The Euro Heart Survey on adult congenital heart disease.

AIMS: To describe clinical and demographic characteristics at baseline of a European cohort of adults with congenital heart disease (CHD) and to assess mortality and morbidity in a 5 year follow-up period. METHODS AND RESULTS: Data collected as part of the Euro Heart Survey on adult CHD was analysed. This entailed information transcribed from the files of 4110 patients diagnosed with one of eight congenital heart conditions ('defects'), who consecutively visited the outpatient clinics of one of the participating centres in 1998. The patients were included retrospectively and followed until the end of 2003 for a median follow-up of 5.1 years. Notwithstanding their overall relatively good functional class and low mortality over the follow-up period, a considerable proportion of the patients had a history of endocarditis, arrhythmias, or vascular events. There were major differences between the eight defects, both in morbidity and regarding specific characteristics. Outcomes were worst in cyanotic defects and in the Fontan circulation, but a considerable proportion of the other patients also suffer from cardiac symptoms. In particular, arrhythmias are common. CONCLUSION: The spectrum of adult CHD in Europe emerging from this survey is one of a predominantly young population with substantial morbidity but relatively low mortality in a 5 year period.

Adolescent↗

Heart rate variability in carcinoid heart disease.

Time domain heart rate variability measurements and echocardiographic studies were performed in 35 patients with carcinoid syndrome. Carcinoid heart disease was present in 18 patients (51%). Heart rate variability parameters (standard deviation of all normal RR intervals, percentage of the number of pairs of adjacent normal RR intervals differing by >50 ms) were significantly reduced in patients with than in those without carcinoid heart disease.

Adult↗

Hemodynamic changes during ventricular pacing in patients with complete heart block and aortic and mitral valvular heart disease.

Increasing the heart rate to near normal in patients with complete heart block (CHB) and slow ventricular rates may lead to greater improvement in ventricular function than when the heart rate is increased from normal to more rapid heart rates. Improvement in ventricular function is usually manifested by a decrease in left ventricular end-diastolic pressure (LVEDP) and volume and by an increase in contractility. In patients with both CHB and valvular heart disease improvement in ventricular function during pacing may be modified by the nature of the valvular disease. Hemodynamic data from six patients with both valvular heart disease and CHB were compared with those from ten patients with CHB and normal cardiac valves. Hemodynamic studies were performed at slow or idioventricular rates and again after increasing the heart rate to more nearly normal levels by ventricular pacing. When obstruction to left ventricular inflow (mitral stenosis) co-existed with CHB, increasing the heart rate resulted in a reduction of an elevated LVEDP to normal. This resulted in only a small increase in left atrial pressure in spite of a striking increase in the mean left atrial-ventricular gradient. When obstruction to left ventricular outflow prevailed (aortic stenosis), improvement in cardiac function was manifested mainly by a decrease in LVEDP and was accompanied by a decrease in left ventricular stroke work. When a large regurgitant volume (aortic insufficiency) was added to a ventricle which has enlarged subsequent to CHB, there was striking elevation in ventricular filling pressures which returned to more nearly normal levels when the heart rate was increased. This was accompanied by a reduction in regurgitant stroke volume in the patient in whom it was measured. Thus, an increase in heart rate may be especially beneficial to those patients with CHB who also have valvular lesions which contribute to an increase in LVEDP and end-diastolic volume. Careful hemodynamic evaluation is helpful in determining appropriate therapy in these patients.

Aged↗

[Correlation between periodontal disease and coronary atherosclerotic heart disease].

OBJECTIVE: To investigate the correlation between coronary atherosclerotic heart disease (CAD) and periodontal disease (PD). METHOD: Forty-five patients with CAD (CAD group) and 40 patients without CAD (control group) were compared with their pathological changes of periodontal tissues and inflammatory markers [high sensitive C reactive protein (hsCRP), interleukin-1beta (IL-1beta), and tumor necrosis factor-alpha (TNF-alpha)]. RESULTS: Univariate analysis showed that the prevalence of PD was 84.44% in CAD group and 22.50% in control group (P < 0.01). The levels of hsCRP, IL-1beta, and TNF-alpha were (5.75 +/- 1.26) mg/L, (10.32 +/- 2.96) ng/L, and (9.17 +/- 2.14) ng/L in CAD group and (1.13 +/- 0.73) mg/ L, (2.87 +/- 1.45) ng/L, and (5.84 +/- 1.96) ng/L in control group (P < 0.01). Gingival index and plaque index were statistically different between two both groups (P < 0.01). Logistic regression analysis showed that in addition to pulse pressure and low density lipoprotein cholesterol, periodontal disease index was a higher risk factor of CAD. Its relative risk was 1.217 (95% CI was 1.120-1.805, P < 0.05). CONCLUSION: PD can cause CAD. The improvement of public oral health plays an important role in the prevention and treatment of CAD.

Adult↗

Cardiac transplantation for endstage heart disease.

Orthotopic heart transplantation (OHT), first accomplished in 1967, is currently performed in over 2000 patients per year at hundreds of centers worldwide. Selection criteria include end-stage heart failure with a limited life expectancy, intractable angina due to inoperable coronary artery disease, malignant ventricular arrhythmias refractory to maximal therapy, and unresectable cardiac tumors. While early immunosuppression was based on azathioprine and steroids, the current success of OHT is based on the addition of cyclosporine A (CyA) to this regimen. At Columbia-Presbyterian Medical Center, steroids and azathioprine are given perioperatively, and cyclosporine (OKT3 in patients with renal dysfunction) begun postoperatively. Survival rates at our institution parallel those reported by other centers, with 1- and 5-year actuarial survival of 85% and 70%, respectively. The most frequent causes of early mortality are allograft rejection and infection, while graft coronary artery disease (CAD) is responsible for most deaths occurring after the first post-transplant year. Regular endomyocardial biopsy is used to monitor for rejection, which occurs in 55% of patients within the first year. Mild or asymptomatic rejection is managed with oral steroids, followed by intravenous steroids and/or OKT3 or anti-thymocyte globulin (ATG) in refractory cases. Graft CAD occurs in 45% of patients surviving 3 years, and may require retransplantation. Heart transplantation is a proven, effective form of cardiac replacement. The recent trend of increasingly critically ill transplant candidates, however, has driven the costs of OHT to unprecedented levels. This issue, as well as the continuing organ short-age and current developments in mechanical cardiac assistance and xenotransplantation will undoubtedly assure a continually evolving role for cardiac transplantation in the treatment of endstage heart disease.

Costs and Cost Analysis↗

Lipids and lipoproteins as predictors of coronary heart disease, stroke, and cancer in the Honolulu Heart Program.

A group of 2,122 healthy men in the Honolulu Heart Program who participated in the Cooperative Lipoprotein Phenotyping Study, 1970 to 1972, were followed for 10 years by repeated examinations and surveillance of hospital discharge and mortality records in order to diagnose new cases of coronary heart disease, stroke, cancer, and other deaths. Total cholesterol and low-density lipoprotein cholesterol were significantly associated with all clinical types of coronary heart disease in multivariate analyses, whereas high-density lipoprotein cholesterol was inversely associated with nonfatal myocardial infarction and total coronary heart disease, but not with fatal coronary heart disease nor angina. Triglyceride and very-low-density lipoprotein cholesterol were associated with total coronary heart disease by univariate but not multivariate analysis. None of the other specific chronic diseases were significantly associated with any lipid or lipoprotein, although there were trends of inverse associations of all noncardiovascular disease with total cholesterol and low-density lipoprotein cholesterol. Thus, for total disease (coronary heart disease, stroke, cancer, and other deaths), the optimal range for lowest disease incidence was about 200 to 220 mg/dl for total cholesterol and 120 to 140 mg/dl for low-density lipoprotein cholesterol. A strong inverse pattern of total disease with high-density lipoprotein cholesterol indicated that the highest levels were the optimal levels.

Age Factors↗