Browsing by Author "Tekin, Abdullah"

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Aortic Stiffness and Inflammation: Dyslipidemia or Matrix Metalloproteinases?
(2016) Tekin, Abdullah; 0000-0002-5658-870X; 27504843; ABD-7304-2021
Assessment of Atrial Fibrillation and Ventricular Arrhythmia Risk after Bariatric Surgery by P Wave/QT Interval Dispersion
(2018) Yilmaz, Mustafa; Altin, Cihan; Tekin, Abdullah; Erol, Tansel; Arer, Ilker; Nursal, Tarik Zafer; Torer, Nurkan; Erol, Varlik; Muderrisoglu, Haldun; 0000-0002-3628-4661; 0000-0002-5658-870X; 0000-0002-2557-9579; 0000-0002-9635-6313; 28900850; AAN-5153-2021; ABD-7304-2021; IQV-1169-2023; S-6973-2016; AAG-8233-2020
The association of obesity with atrial fibrillation (AF) and with ventricular arrhythmias is well documented. The aim of this study was to investigate whether weight reduction by a laparoscopic sleeve gastrectomy has any effect on P wave dispersion (PWD), a predictor of AF, and corrected QT interval dispersion (CQTD), a marker of ventricular arrhythmias, in obese individuals. In a prospective study, a total of 114 patients (79 females, 35 males) who underwent laparoscopic sleeve gastrectomy were examined. The patients were followed 1 year. PWD and CQTD values before and 3rd, 6th, and 12th months after the surgery were calculated and compared. There was a statistically significant decline in body mass index (BMI), PWD, and CQTD values among baseline, 3rd, 6th, and 12th months (p < 0.001 for all comparisons). Correlation analysis showed a statistically significant correlation between Delta PWD and Delta BMI (r = 0.719, p < 0.001), Delta PWD and Delta left ventricular end-diastolic diameter (LVEDD) (r = 0.291, p = 0.002), Delta PWD and Delta left atrial diameter (LAD) (r = 0.65, p < 0.001), Delta CQTD and Delta BMI (r = 0.266, p = 0.004), Delta CQTD and Delta LVEDD (r = 0.35, p < 0.001), Delta CQTD and Delta LAD (r = 0.289, p = 0.002). In multiple linear regression analysis, there was a statistically significant relationship between Delta PWD and Delta BMI (beta = 0.713, p < 0.001), Delta PWD and Delta LVEDD (beta = 0.174, p = 0.016), Delta PWD and Delta LAD (beta = 0.619, p < 0.001), Delta CQTD and Delta BMI (beta = 0.247, p = 0.011), Delta CQTD and Delta LVEDD (beta = 0.304, p < 0.001), Delta CQTD and Delta LAD (beta = 0.235, p = 0.009). PWD and CQTD values of patients were shown to be attenuated after bariatric surgery. These results indirectly offer that there may be a reduction in risk of AF, ventricular arrhythmia, and sudden cardiac death after obesity surgery.
Assessment of Atrial Fibrillation and Ventricular Arrhythmia Risk after Transplantation in Patients with End Stage Renal Disease by P Wave/QT Interval Dispersion, Tp-e Interval, Tp-e/QT Interval Ratio
(2018) Yilmaz, Mustafa; Altin, Cihan; Tekin, Abdullah; Arer, Ilker; Yabanoglu, Hakan; Caliskan, Kenan; Moray, Gokhan; Ozin, Bulent; Muderrisoglu, Haldun; Haberal, Mehmet; https://orcid.org/0000-0002-2557-9579; https://orcid.org/0000-0002-5658-870X; https://orcid.org/0000-0002-1161-3369; https://orcid.org/0000-0002-8767-5021; https://orcid.org/0000-0003-2498-7287; https://orcid.org/0000-0003-3821-412X; https://orcid.org/0000-0002-9635-6313; https://orcid.org/0000-0002-3462-7632; S-6973-2016; ABD-7304-2021; AAJ-7865-2021; AAJ-7201-2021; AAE-1041-2021; AAD-9938-2021; AAG-8233-2020; AAJ-8097-2021
Attenuated Heart Rate Recovery in Mercury-Exposed Individuals
(2017) Tekin, Abdullah; 0000-0002-5658-870X; 27710959; ABD-7304-2021
Comparison of application of 2013 ACC/AHA guideline and 2011 European Society of Cardiology guideline for the management of dyslipidemias for primary prevention in a Turkish cohort
(2017) Yilmaz, Mustafa; Atar, Ilyas; Hasirci, Senem; Akyol, Kadirhan; Tekin, Abdullah; Karacaglar, Emir; Ciftci, Orcun; Muderrisoglu, Haldun; 0000-0002-9635-6313; 0000-0002-2538-1642; 0000-0001-8926-9142; 0000-0002-8342-679X; 0000-0002-5658-870X; 0000-0002-2557-9579; 27684519; AAG-8233-2020; ABI-6723-2020; W-5233-2018; AAK-7805-2021; ABD-7304-2021; S-6973-2016
OBJECTIVE: Atherosclerotic cardiovascular disease is a major global cause of death. The common approach in primary prevention of cardiovascular disease is to identify patients at high risk for cardiovascular disease. This article analyzes and compares the application of 2013 American College of Cardiology/American Heart Association (ACC/AHA) guideline and the 2011 European Society of Cardiology (ESC) guideline for the management of dyslipidemias for primary prevention in Turkish population. METHODS: The study included 833 patients (482 women and 351 men). Risk scores were calculated according to both guidelines and indications for statin treatment were determined according to sex and age group. Variables are presented as mean +/- SD or median with interquartile range for continuous data and as proportions for categorical data. Variables were analyzed by unpaired t-test, Mann-Whitney U test, chi-square or Fischer's exact test as appropriate. RESULTS: The ACC/AHA would suggest statin treatment in 415 patients out of 833 (49.5%), while ESC would recommend statin for 193 patients out of 833 (23.1%)(p<0.001). Statins would be recommended for 40.4% of women and 62.6% of men for primary prevention by the ACC/AHA, while this figure was 12% for women and 38.4% for men according to the ESC guideline (p<0.001 for both). CONCLUSION: When compared to the ESC guideline, the ACC/AHA guideline suggests augmented statin treatment for primary prevention in Turkish population
Comparison of Carvedilol and Metoprolol for Preventing Contrast-Induced Nephropathy after Coronary Angiography
(2015) Yilmaz, Mustafa; Aydinalp, Alp; Okyay, Kaan; Tekin, Abdullah; Bal, Ugur Abbas; Bayraktar, Nilufer; Yildirir, Aylin; Muderrisoglu, Haldun; 26195972
Aims: Contrast-induced nephropathy (CIN) is one of the most common causes of hospital-acquired acute renal failure. Oxidative stress and vasoconstriction might play key roles in its pathogenesis. In a few experimental models, antioxidant properties of carvedilol have been documented. The aim of this study was to analyze and compare the effects of carvedilol and metoprolol on the development of CIN in patients undergoing coronary angiography. Methods: One hundred patients currently taking metoprolol and 100 patients currently taking carvedilol were enrolled into the study. Venous blood samples were obtained before and 48 h after contrast administration. Cystatin C and malondialdehyde values were examined and compared. CIN was defined as a creatinine increase of at least 25% or 0.5 mg/dl from the baseline value. Results: Seven patients in the carvedilol group (7%) and 22 patients in the metoprolol group (22%) developed CIN (p = 0.003). In the metoprolol group, the median cystatin C concentration increased significantly from 978 to 1,086 ng/ml (p = 0.001) 48 h after radiocontrast administration. In the carvedilol group, the median cystatin C concentration did not change significantly (1,143 vs. 1,068 ng/ml; p = 0.94). In the metoprolol group, the mean malondialdehyde concentration increased significantly from 7.09 +/- 1.48 to 8.38 +/- 2.6 nmol/l (p < 0.001). In the carvedilol group, the mean serum malondialdehyde concentration did not change significantly (7.44 +/- 1.21 vs. 7.56 +/- 1.11 nmol/l; p = 0.59). Conclusion: When compared to metoprolol, carvedilol might decrease oxidative stress and subsequent development of CIN. (C) 2015 S. Karger AG, Basel
Contrast nephropathy in patients with well-preserved renal function
(2015) Tekin, Goknur; Tekin, Abdullah; 25625447
Endothelial nitric oxide synthase gene polymorphisms in patients with slow coronary flow
(2017) Tekin, Abdullah; Sezgin, Nurzen; Atac, Fatma Belgin; Verdi, Hasibe; Sezgin, Alpay Turan; 0000-0002-5658-870X; 0000-0001-6868-2165; 0000-0003-0591-009X; 29201435; ABG-9940-2020; ABD-7304-2021; ABG-9966-2020
Background and aims: The aim of this study was to explore potential associations of the intron 4 variable number of tandem repeats (VNTR) and E298A polymorphisms of the endothelial nitric oxide synthase (eNOS) gene with slow coronary flow (SCF). The association between plasma nitrate and nitrite (NOx) concentrations and eNOS gene polymorphisms was also assessed. Materials and methods: The intron 4 VNTR and E298A polymorphisms of the eNOS gene were evaluated in the isolated DNA blood samples obtained from the SCF patient group (n = 30) and healthy group consisted of age- and sex-matched controls (n = 61). Results: Plasma NOx level was significantly lower in patients with SCF than in controls. In addition, patients with SCF have significantly lower nitric oxide levels than control subjects within each genotype variants. The allele and genotyped frequencies of the eNOS intron 4 VNTR and E298A polymorphisms were similar between patients with SCF and the controls. Plasma NOx concentrations with respect to the relevant genotypes were found insignificant. Discussion and conclusion: Plasma NOx is lower in patients with SCF than in healthy subjects. Our findings may suggest the lack of association between intron 4 VNTR and E298A polymorphisms of the eNOS gene and SCF.
An epidemiological study to define the recent clinical characteristics and outcomes of infective endocarditis in southern Turkey
(2021) Acibuca, Aynur; Yilmaz, Mustafa; Okar, Sefa; Kursun, Ebru; Acilar, Onur; Tekin, Abdullah; Demiroglu, Yusuf Ziya; Muderrisoglu, Ibrahim Haldun; 0000-0002-9866-2197; 0000-0002-5658-870X; 33830167; AAZ-9711-2021; ABD-7304-2021
Introduction: The aim of this study was to characterise the recent features of patients with infective endocarditis (IE) at one referral centre in southern Turkey, in order to be able to identify the high-risk subgroup and revise preventative measures and management strategies. Methods: Medical records of patients 18 years and older, who had been diagnosed with IE according to the Duke criteria between January 2009 and October 2019, were retrospectively evaluated in a referral general hospital. Results: The total of 139 IE cases comprised 59.7% males and 40.3% females, with a mean age of 55 +/- 16 years. The most encountered symptom was fever (55.4%) and the mitral valve (54%) was the most frequently involved. The most common causative micro-organisms were coagulase-negative staphylococci (30.2%). The in-hospital mortality rate was 30.2%, with congestive heart failure, chronic renal disease and chronic dialysis found to be significantly associated with in-hospital mortality. Conclusion: The study results demonstrate the recent epidemiological features of IE in southern Turkey that are important for clinicians to manage diagnostic and therapeutic processes successfully. Older age, the predominance of staphylococci and higher surgery rates are consistent with the changing trends of IE in some parts the world.
Erectile dysfunction and heart rate recovery. Is it autonomic nervous system?
(2016) Tekin, Abdullah; 0000-0002-5658-870X; 27515109; ABD-7304-2021
Heart rate recovery and methodological issues
(2015) Tekin, Goknur; Tekin, Abdullah; 25550263
Heart Rate Recovery and Physical Conditioning
(2015) Tekin, Goknur; Tekin, Abdullah; 25531076
Heart Rate Recovery and Physical Fitness
(2014) Tekin, Goknur; Tekin, Abdullah; https://orcid.org/0000-0002-6193-0848; https://orcid.org/0000-0002-5658-870X; 25449479; ABD-7488-2021; ABD-7304-2021
Investigation of The Relationship Between Asthma and Subclinical Atherosclerosis by Carotid/Femoral Intima Media and Epicardial Fat Thickness Measurement
(2018) Yilmaz, Mustafa; Yilmaz, Hatice Eylul Bozkurt; Sen, Nazan; Altin, Cihan; Tekin, Abdullah; Muderrisoglu, Haldun; https://orcid.org/0000-0002-2557-9579; https://orcid.org/0000-0002-4171-7484; https://orcid.org/0000-0002-5658-870X; https://orcid.org/0000-0002-9635-6313; 28453377; S-6973-2016; AAI-8947-2021; ABD-7304-2021; AAG-8233-2020
Objective: Since asthma and atherosclerosis may share similar pathophysiological mechanism, this study is planned to investigate whether epicardial fat thickness (EFT), carotid and femoral intima media thicknesses, which are markers of subclinical atherosclerosis, are increased in patients with asthma. Methods: The study was designed as a cross-sectional study. A total of 154 participants (83 patients with asthma and 71 healthy volunteers) were enrolled into the study. Epicardial fat, carotid, and femoral intima media thicknesses were measured and recorded in both groups. The statistical difference between the two groups was examined. Results: Both carotid and femoral intima media thicknesses were significantly higher in patients with asthma compared to control group (5.52 +/- 0.4 mm vs. 5.36 +/- 0.4 mm; p = 0.038 and 5.64 +/- 0.4 mm vs. 5.46 +/- 0.5 mm; p = 0.036, respectively). However, there was not a significant difference in EFT between the groups [5.9 mm (5.3-6.6; IQR = 1.3) vs. 5.6 mm (4.7-6.5; IQR = 1.8); p = 0.1]. On comparison of control group and asthma subgroups (mild, moderate, and severe), there was a statistically significant difference among these four groups in terms of carotid and femoral intima media thicknesses (p = 0.002 and p < 0.001, respectively). Subgroup analyses showed that this difference was mainly due to patients with severe asthma. Conclusions: Carotid and femoral intima media thicknesses in asthmatic patients were found to be increased compared to the normal population. As a result, the risk of subclinical atherosclerosis in asthmatic patients may be high.
Turkish Society of Cardiology consensus report on the rational use of cardiac troponins in daily practice
(2019) Okyay, Kaan; Sadic, Beste Ozben; Sahinarslan, Asife; Durakogulları, Murtaza Emre; Karabay, Can Yuksel; Eryuksel, Semiha Emel; Gulbahar, Ozlem; Tekin, Abdullah; 31073114; AAK-7355-2020