Yazar "Koroglu, Bayram" seçeneğine göre listele

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    Apparently low serum asymmetric dimethylarginine is associated with fasting glucose and tends toward association with type-2 diabetes
    (Turkish Soc Cardiology, 2014) Onat, Altan; Koroglu, Bayram; Can, Gunay; Karagoz, Ahmet; Yuksel, Murat; Aydin, Mesut
    Objective: We investigated the association of serum asymmetric dimethylarginine (ADMA) with metabolic syndrome (MetS), type-2 diabetes and coronary heart disease (CHD) in the general population. Methods: Cross-sectional and, at 2000 person-years' follow-up, prospective analysis. Adults with measured serum ADMA level (n=848) were analyzed using tertiles or dichotomized values. ADMA concentrations were measured by a validated commercial ELISA kit. Results: Dichotomized subjects of combined sexes with low (<= 0.68 mu ol/L) ADMA values had significantly higher fasting glucose, total cholesterol, apolipoprotein B and lower diastolic blood pressure. In linear regression analyses comprising age, smoking, triglyceride, HDL-cholesterol, C-reactive protein and waist circumference as well, creatinine was significantly and independently associated with ADMA, further in women glucose (inversely). In logistic regression analyses uniformly adjusted for age, smoking status and waist girth, prevalent MetS tended to positive independent association with ADMA tertiles only in men. Combined prevalent and incident diabetes weakly tended to be associated with the lowest (vs mid-and highest) ADMA tertiles in combined gender; and prevalent and incident CHD was not associated with ADMA tertiles in either sex. Conclusion: Apparently low circulating ADMA is independently associated with fasting glucose and tends to be so with type-2 diabetes. The lack of anticipated positive associations of ADMA with cardiometabolic disorders is likely due to autoimmune responses operating against serum ADMA under oxidative stress, rendering partial failure in immunoassay.
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    Epidemiology, anticoagulant treatment and risk of thromboembolism in patients with valvular atrial fibrillation: Results from Atrial Fibrillation in Turkey: Epidemiologic Registry (AFTER)
    (Via Medica, 2014) Kaya, Hasan; Ertas, Faruk; Kaya, Zekeriya; Eren, Nihan Kahya; Yuksel, Murat; Koroglu, Bayram; Kose, Nuri
    Background: The aim of this study was to perform a multicenter, prospective investigation regarding the epidemiology, the current effectiveness of therapeutic anticoagulation, and the risk of thromboembolism in patients with valvular atrial fibrillation (AF) based on the records of the Atrial Fibrillation in Turkey: Epidemiologic Registry (AFTER) study. Methods: Patients were selected from a total of 2,242 consecutive admissions that presented with AF diagnosed via electrocardiogram. Those diagnosed with non-valvular AF were excluded from the AFTER study population, which left 497 patients with valvular AF for analysis. Results: The etiology of valvular AF in patients was either attributed to rheumatic mitral valve stenosis (n = 217) or possessing a prosthetic heart valve (n = 280). Out of all the patients with valvular AF, 83.1% were taking warfarin for anticoagulation. Only 36.1% demonstrated a therapeutic international normalized ratio (INR), and among those patients it was found that 19.1% exhibited a labile INR. Multivariate analysis revealed that age was the only independent predictor of thromboembolic events in patients with valvular AF. Conclusions: Many valvular AF patients are not maintained at therapeutic INR levels, which poses a threat to patient health as they age and are at greater risk for thromboembolism.
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    High adiponectin levels fail to protect against the risk of hypertension and, in women, against coronary disease: involvement in autoimmunity?
    (Baishideng Publishing Group Inc, 2013) Onat, Altan; Aydin, Mesut; Can, Gunay; Koroglu, Bayram; Karagoz, Ahmet; Altay, Servet
    AIM: To investigate whether serum adiponectin protects against cardiometabolic risk in a population sample with prevailing metabolic syndrome. METHODS: Middle-aged adults representative of a general population with baseline circulating adiponectin measurements (n = 1224) were analyzed prospectively at a mean of 3.8 years' follow-up, using continuous values or sex-specific tertiles. Total adiponectin was assayed by an ELISA kit. Type-2 diabetes was identified by criteria of the American Diabetes Association. Hypertension was defined as a blood pressure >= 140 mmHg and/or >= 90 mmHg and/or use of antihypertensive medication. Outcomes were predicted using Cox proportional hazards regression analysis in models that were controlled for potential confounders. RESULTS: In models of multiple linear regression, sex hormone-binding globulin, fasting insulin (inverse) and, in men, age were significant independent covariates of serum adiponectin which further tended in women to be positively associated with serum creatinine. Cox regression analyses for incident coronary heart disease (CHD), adjusted for sex, age, non-HDL cholesterol, waist circumference and C-reactive protein, revealed significant inverse association with adiponectin tertiles in men but not women (HR = 0.66; 95% CI: 0.32-1.38 for highest tertile). Cox regression for type-2 diabetes in a similar model (wherein glucose replaced non-HDL cholesterol), adiponectin tertiles appeared to protect in each gender. HR for incident hypertension roughly displayed unity in each of the adiponectin tertiles (P -trend = 0.67). CONCLUSION: High adiponectin levels failed to protect against the development of hypertension and, in women, against CHD, presumably paralleling impairment in renal function as well. Involvement of adiponectin in autoimmune complex with loss of antioxidative- antiatherogenic properties may be underlying. (C) 2013 Baishideng. All rights reserved.
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    Impaired fasting glucose: Pro-diabetic, atheroprotective and modified by metabolic syndrome
    (Baishideng Publishing Group Inc, 2013) Onat, Altan; Aydin, Mesut; Can, Gunay; Cakmak, H. Altug; Koroglu, Bayram; Kaya, Aysem; Ademoglu, Evin
    AIM: To investigate whether impaired fasting glucose (IFG) confers cardiovascular risk. METHODS: A non-diabetic population-based sample representative of middle-aged and elderly Turks was studied at 8.5 years' follow-up for incident diabetes and coronary heart disease (CHD). Metabolic syndrome (MetS) was defined by ATP-III criteria modified for male abdominal obesity, and IFG and type 2 diabetes were identified by criteria of the American Diabetes Association. Stratification by presence of MetS was used. Outcomes were predicted providing estimates for hazard ratio (HR) obtained by use of Cox proportional hazards regression analysis in models that controlled for potential confounders. RESULTS: In 3181 adults (aged 52 +/- 11.5 years at baseline), analysis stratified by MetS, gender and IFG status distinguished normoglycemic subjects by a hypertriglyceridemic waist phenotype consisting of significantly higher waist circumference, fasting triglyceride and lower high-density lipoprotein-cholesterol, regardless of gender and MetS. Additionally, lipoprotein (Lp) (a) tended to be lower in (especially female) participants with MetS. Multivariable linear regression in a subset of the sample demonstrated decreased Lp (a) levels to be associated with increased fasting glucose and insulin concentrations, again particularly in women. In Cox regression analysis, compared with normoglycemia, baseline IFG adjusted for major confounders significantly predicted incident diabetes at a 3-fold HR in men and only women with MetS. Cox models for developing CHD in 339 individuals, adjusted for conventional risk factors, revealed that IFG status protected against CHD risk [HR = 0.37 (95% CI: 0.14-0.998)] in subjects free of MetS, a protection that attenuated partly in male and fully in female participants with MetS. CONCLUSION: IFG status in non-diabetic people without MetS displays reduced future CHD risk, yet is modulated by MetS, likely due to autoimmune activation linked to serum Lp (a). (C) 2013 Baishideng. All rights reserved.
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    Predictors of Anticoagulant Treatment in Patients With Nonvalvular Atrial Fibrillation: Results From Atrial Fibrillation in Turkey: Epidemiologic Registry
    (Sage Publications Inc, 2015) Kaya, Hasan; Ertas, Faruk; Koroglu, Bayram; Vatan, Bulent; Cagliyan, Caglar Emre; Gedik, Selcuk; Yeter, Ekrem
    The aim of the study was to assess the factors associated with the anticoagulation treatment in patients with atrial fibrillation (AF). A total of 2242 consecutive patients who had been admitted with AF on their electrocardiogram were included in the study. After excluding valvular AF, 1745 patients with nonvalvular AF were analyzed. Mean CHA2DS2-VASc score [cardiac failure, hypertension, age >= 75 (doubled), diabetes, stroke (doubled), vascular disease, age 65 -74 and sex category (female)], frequency of persistent/permanent AF, hypertension, diabetes mellitus (DM), stroke history, body mass index, and left atrial diameter were significantly higher in patients receiving anticoagulant therapy. Stroke history, persistent/permanent AF, hypertension, DM, age, heart failure, and left atrial diameter were independent predictors of warfarin prescription. Labile international normalized ratio was the only independent negative predictor of effective treatment with warfarin. In this study, we demonstrated that stroke history, persistent/permanent AF, hypertension, DM, and left atrial diameter were positive predictors, whereas advanced age and heart failure were negative predictors of oral anticoagulant use in patients with nonvalvular AF.
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    Serum total and high-density lipoprotein phospholipids: Independent predictive value for cardiometabolic risk
    (Churchill Livingstone, 2014) Onat, Altan; Cakmak, H. Altug; Can, Gunay; Yuksel, Murat; Koroglu, Bayram; Yuksel, Husniye
    Objective: Given that serum phospholipids (PL) may serve as inflammation mediators, we studied whether they predicted metabolic syndrome (MetS), type-2 diabetes or coronary heart disease (CHD) risk in people prone to enhanced low-grade inflammation. Methods: We analyzed unselected middle-aged Turkish adults with available serum total (n = 852) and HDL-PL (n = 428) measurements and follow-up (mean 6.6 years) by Cox or logistic regression, after exclusion of prevalent cases of outcome disorder. The enzymatic method used measured total content of phosphatidylcholine, sphingomyelin and lyso-phosphatidylcholine. Results: Most lipid and non-lipid variables were significantly different in the upper two compared with the lowest total PL tertile, whereby apolipoprotein (apo)A-I and HDL-cholesterol were higher (not lower). ApoA-I. HDL-cholesterol and uric acid were uniformly positive independent linear covariates of total and HDL PI, apoA-I even in participants without MetS. After adjustment for sex, age, waist circumference. HDL-cholesterol and systolic blood pressure, logistic regression for incident MetS disclosed a 3-fold risk (RR [95% CI 1.28; 6.81]) in the upper HDL-pl tertile. In Cox regression models, while the combined two higher HDL-pl tertiles significantly protected against CHD risk in males (HR 0.29 [95% CI 0.10; 0.89]), they weakly tended to impart risk in females: upper two total PL tertiles tended to increased risk of diabetes and CHD. Conclusion: Excess total PL may mediate inflammatory properties to apoA-I. HDL and uric acid. Excess HDL-pl independently predict risk for MetS in each gender, but are protective against CHD risk in men, possibly because oxidized PL content mediated by total PL is sex-dependent, as reviewed elsewhere. (C) 2013 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.
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    TARF Survey 2011: mortality and performance in the long-term follow-up
    (Turkish Soc Cardiology, 2012) Onat, Altan; Aydin, Mesut; Koroglu, Bayram; Ornek, Ender; Altay, Servet; Celik, Ethem; Karagoz, Ahmet
    Objectives: We analyzed all-cause and coronary mortality data of the Turkish Adult Risk Factor Study cohort in Marmara and Central Anatolia regions, surveyed in 2011, and overall performance of long-term (21 years) follow-up of participants. Study design: A total of 1,588 participants with an age range of 45 to 74 years were surveyed. Information on the mode of death was obtained from first-degree relatives and/or personnel of local health offices. Information on survivors was obtained from history, physical examination, and 12-lead electrocardiograms. Loss to follow-up was defined as the lack of physical examination for at least eight years. Results: Of the surveyed participants, 854 were examined, information on health status was obtained in 606 subjects, 46 individuals (28 men, 18 women) were ascertained to have died, and 82 subjects were lost to follow-up. A total of 2,800 person-years were added to follow-up. Nineteen deaths were attributed to coronary heart disease (CHD) and five deaths to cerebrovascular events. Overall mortality was estimated as 10.9 per 1000 person-years. In the age bracket of 45-74 years, overall annual all-cause mortality and CHD mortality were 12.8 and 5.5 per mille, respectively. Based on the total loss to follow-up (31.2%) during the past two decades, an annual loss to follow-up may be derived as 19.3 for every 1000 participants. This loss was nearly twice as high in participants living in big cities compared to those in smaller towns and rural areas. Conclusion: A trend to slight reduction in coronary mortality, though not in overall mortality, before the age 75 years is noted in Turks. Annual loss to follow-up amounts to 2% of the participants.
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    Turkish Adult Risk Factor Study survey 2012: overall and coronary mortality and trends in the prevalence of metabolic syndrome
    (Turkish Soc Cardiology, 2013) Onat, Altan; Yuksel, Murat; Koroglu, Bayram; Gumrukcuoglu, H. Ali; Aydin, Mesut; Cakmak, H. Altug; Karagoz, Ahmet
    Objectives: We aimed to analyze 1) overall and coronary mortality findings in the Turkish Adult Risk Factor (TARF) study survey 2012 and 2) the temporal trends in the prevalence of metabolic syndrome (MetS) and its distribution across seven geographic regions. Study design: Information on the mode of death was obtained from first-degree relatives and/ or health personnel of a local health office. Information collected in survivors was based on history, physical examination of the cardiovascular system and Minnesota coding of resting electrocardiograms. Results: Of 1527 participants to be surveyed, 796 were examined. Information was obtained on the health status in 502 subjects, and death was ascertained in 56 participants. Thirty deaths were attributed to coronary and cerebrovascular disease. Cumulative 22-year evaluation of participants in the age bracket 45-74 years revealed coronary mortality to be high, with 7.6 per 1000 person-years in men and 3.8 in women. Data used from 1754 identical subjects (median age 46 years initially), and examined in two periods 12 years apart, indicated an increase in the prevalence of MetS by 1.3% per aging of 1 year. Analysis across geographic regions showed a rise in the prevalence in the Mediterranean region, already having highest prevalence along with thr Southeast Anatolia, while the prevalence declined in the Marmara region and persisted to be thr lowest in the Aegean region. Conclusion: The prevalence of MetS in Turkish adults aged 40 years or over, currently standing at 53%, shows significant differences across geographic regions, being highest in the two southern regions and lowest in the Aegean region.