OBOğuzhan Birdal

Oğuzhan Birdal

*This is an algorithmically generated author record based on publicly available information.

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Oğuzhan Birdal has a total of 108 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Effect of sodium glucose cotransporter-2 inhibitors (SGLT-2is) on the clinical outcomes of patients with diabetic atrial fibrillation

    by Selim Aydemir, Sidar Şiyar Aydın, Emrah Aksakal, Onur Altınkaya, Murat Özmen, Oğuzhan Birdal

    Diabetes mellitus (DM) and atrial Fibrillation (AF) are among the most common health issues. They are responsible for the highest rates of morbidity and mortality. The importance of sodium glucose cotransporter-2 inhibitors (SGLT-2is) in treating DM has increased significantly in recent years. In our article, we aimed to evaluate the effect of SGLT-2i on the clinical outcomes of AF patients with DM. Our study is a retrospective, observational study. The patients with AF and DM were divided into two groups: those using SGLT-2i or not using SGLT-2i, and 3-year follow-up results were examined. The endpoints of the study were defined as all-cause death, the development of myocardial infarction (MI), major bleeding requiring hospitalization, and an ischemic cerebrovascular event (CVE). Differences between groups according to SGLT-2i use were analyzed. The study included 485 patients, 205 (42.3%) of whom were male and had an average age of 70.7 ± 9.7 years. A total of 138 of 485 patients (28.5%) received SGLT-2i. All-cause mortality was lower in the group receiving SGLT-2i (p < 0.001). Similarly, a significant reduction in major bleeding events was observed among those who received SGLT-2i treatment (p = 0.009). The incidence of CVEs was lower among SGLT-2i recipients, but the difference was not statistically significant (p = 0.066). SGLT2i usage did not mitigate the risk of MI development (p = 0.317). In our study, SGLT-2i treatment was associated with a significant reduction in all-cause mortality and major bleeding in diabetic AF patients. Our study provides evidence of the clinical benefit of SGLT-2i in AF patients.


  • Open Access

    The importance of Naples prognostic score in predicting long-term mortality in heart failure patients

    by Sidar Şiyar Aydın, Selim Aydemir, Murat Özmen, Emrah Aksakal, İbrahim Saraç, Faruk Aydınyılmaz, Onur Altınkaya, Oğuzhan Birdal, İbrahim Halil Tanboğa

    Heart failure (HF) remains a significant health problem despite advances in diagnosis and treatment options. Malnutrition and increased inflammation predict poor disease prognosis. The parameters of the Naples prognostic score (NPS) include albumin, total cholesterol, neutrophil-lymphocyte ratio (NLR), and lymphocyte-monocyte ratio (LMR). We aimed to assess the potential of NPS as a predictor of long-term mortality in patients with HF. A total of 1728 patients with HF who applied to our center between 2018 and 2022 were included in this study. The NPS was computed and the patients were divided into three groups according to their NPS values as follows: NPS = 0 (Group 1), NPS = 1-2 (Group 2), and NPS = 3-4 (Group 3). We also evaluated the association between NPS value and HF mortality. The patients were followed for a mean follow-up duration of 30 months. The mortality rate was 8.3% (145 patients). We carried out Model-1 and -2 Cox regression analyses to identify long-term mortality determinants. Model-2 was constructed by adding NPS to Model-1. NPS was significantly associated with HF mortality (Hazard Ratio: 2.194, 95% Confidence Interval: 1.176-4.091, p = 0.014). According to the Kaplan-Meier plot and log-rank analyses, there was a statistically significant difference in the long-term mortality of patients with HF and their NPS values for the entire cohort. Based on our findings, NPS showed promise as an independent predictor of long-term mortality in individuals with HF.


  • Open Access

    Deep Vein Thrombosis Prophylaxis for Whom? When?

    by Sidar Şiyar Aydın, Oğuzhan Birdal

    Deep vein thrombosis (DVT) is a type of thrombus seen in the deep leg veins. DVT is a clinical condition that can cause pulmonary embolism. Pulmonary embolism is a significant contributor to the rates of illness and death worldwide. In a healthy state, blood circulation is regulated by procoagulant and anticoagulant factors to prevent the formation of blood clots. However, conditions called Virchow’s triad, whose components are hypercoagulation, venous stasis, and endothelial damage, increase the tendency to DVT if one or more of these components are present. Using prophylaxis is recommended for preventing DVT in patients with predisposing conditions. Prophylaxis reduces morbidity and mortality. Conditions such as immobility, orthopedic surgery, obesity, advanced age, active cancer, and hormone replacement therapy may increase the risk of venous thrombosis. Those patients who present with multiple risk factors are identified as being at high risk for DVT and are administered prophylactic anticoagulants.

  • Open Access

    Perioperative Assessment and Clinical Outcomes of Percutaneous Atrial Septal Defect Closure with Three-Dimensional Transesophageal Echocardiography

    by İbrahim Saraç, Oğuzhan Birdal

    Background/Objectives: To close the atrial septal defect (ASD) with the transcatheter method, correctly defining the defect and selecting the appropriate closure device size are the most critical steps for the procedure’s success. Although ASD can be successfully closed under the guidance of three-dimensional (3D) transesophageal echocardiography (TEE) and two-dimensional (2D) TEE, measurement comparisons between different types of defects are still needed. Methods: Our study was designed retrospectively. Sixty-one patients who underwent transcatheter ASD closure with 2D TEE and 3D TEE between 2020 and 2024 were included. The patients were divided into three groups according to the defect shape: circular, oval, and complex; and the measurement results, perioperative process, and clinical outcomes were compared in each group. Results: The average age of the patients was 35.05 ± 13.87 years, and 41 (67.2%) were women. The average follow-up period of the patients was 15.3 ± 9.18 months. No statistical significance was observed in the comparison of measurements obtained with 3D TEE and 2D TEE in the circular and oval defect groups. The differences between the minimum defect diameters of complex defects measured by 2D TEE and 3D TEE (p: 0.037), IVC rims (p < 0.001), aortic rims (p: 0.012), and the differences between implanted device dimensions and the maximum defect diameters measured by both methods were compared; statistical significance was observed (p: 0.025). Conclusions: In circular and non-complex oval defects, it has been observed that the size of the closure device selected with 2D TEE or 3D TEE is optimal, and the procedure is practical and feasible. While the closure of complex ASDs with 3D TEE provides reliable and optimal results, using only 2D TEE in complex ASDs may lead to selecting a smaller-sized device.


  • Open Access

    Cluster analysis of clinical, angiographic, and laboratory parameters in patients with ST-segment elevation myocardial infarction

    by Oğuzhan Birdal, Emrah İpek, Mehmet Saygı, Remziye Doğan, Levent Pay, Ibrahim Halil Tanboğa

    ST-segment elevation myocardial infarction (STEMI) represents the most harmful clinical manifestation of coronary artery disease. Risk assessment plays a beneficial role in determining both the treatment approach and the appropriate time for discharge. Hierarchical agglomerative clustering (HAC), a machine learning algorithm, is an innovative approach employed for the categorization of patients with comparable clinical and laboratory features. The aim of the present study was to investigate the role of HAC in categorizing STEMI patients and to compare the results of these patients. A total of 3205 patients who were diagnosed with STEMI at the university hospital emergency clinic between 2015 and 2023 were included in the study. The patients were divided into 2 different phenotypic disease clusters using the HAC method, and their outcomes were compared. In the present study, a total of 3205 STEMI patients were included; 2731 patients were in cluster 1, and 474 patients were in cluster 2. Mortality was observed in 147 (5.4%) patients in cluster 1 and 108 (23%) patients in cluster 2 (chi-square P value < 0.01). Survival analysis revealed that patients in cluster 2 had a significantly greater risk of death than patients in cluster 1 did (log-rank P < 0.001). After adjustment for age and sex in the Cox proportional hazards model, cluster 2 exhibited a notably greater risk of death than did cluster 1 (HR = 3.51, 95% CI = 2.71–4.54; P < 0.001). Our study showed that the HAC method may be a potential tool for predicting one-month mortality in STEMI patients.


  • Open Access

    Carotid endarterectomy compared with carotid artery stenting for extracranial carotid artery stenosis: a retrospective single-centre study

    by Oğuzhan Birdal, Eyüp S. Çalık, Ümit Arslan, Yavuzer Koza, Uğur Kaya, Abdurrahim Çolak, M. Hakan Taş

    Aim: One of the main risk factors for an ischemic stroke is significant carotid artery stenosis, and extracranial severe carotid artery stenosis accounts for 20% of ischemic strokes. Prior to the

  • Open Access

    Serum asprosin levels are increased in patients with periodontitis and ST‐segment elevation myocardial infarction and correlated with periodontal parameters: A case–control study

    by Sema Nur Sevinç Gül, Oğuzhan Birdal, Esra Laloğlu

    Objective: The study aims to investigate whether patients with ST‐elevation myocardial infarction (STEMI)‐related periodontitis will experience any changes in asprosin levels.Background: Periodontitis is a common, chronic infection of the periodontium that is epidemiologically associated with cardiovascular disease. Although asprosin, a hormone released from adipose tissue, is a protective role in cardiovascular diseases, its effectiveness in periodontitis is unknown.Methods: The study was conducted on a total of 120 patients, divided into four groups; the group of healthy control (n = 35), the group of periodontitis (n = 35), the group of periodontitis+STEMI (n = 25), and the group of STEMI (n = 25). In each patient, age, serum asprosin, CRP, troponin‐I, and clinical periodontal parameters [plaque index (PI), gingival index (GI), bleeding on probing (BOP), probing depth (PD), and clinical attachment level (CAL)] were evaluated. The results were analyzed statistically.Results: Serum asprosin, CRP, and troponin‐I levels were statistically higher in the STEMI+periodontitis group compared to the other groups. In addition, as a result of the study, it was observed that there was a correlation between serum asprosin levels, clinical periodontal parameters, and CRP levels.Conclusions: The results of this study show that STEMI and periodontitis are associated with high asprosin levels. Since the risk of periodontitis is high in STEMI patients, periodontitis should also be considered when evaluating asprosin levels in STEMI patients.


  • Open Access

    The Role of Prognostic Nutritional Index in Predicting Multivessel Disease in Patients with ST-Segment Elevation Myocardial Infarction

    by Emrah Aksakal, Oğuzhan Bi̇rDal

    Acute coronary syndromes (ACS) are common diseases and one of the most common causes of death in the world. The most feared ACS is ST segment elevation myocardial infarction (STEMI). Approximately 50% of STEMI patients have lesions in multivessel disease (MVD), and this is associated with poor outcomes. In this study, we aimed to evaluate prognostic nutritional index (PNI) in patients with STEMI and MVD. 1708 patients diagnosed with STEMI were included in the study. The patients' blood parameters, electrocardiography and echocardiography findings, coronary angiography images were recorded and calculations were made. The mean follow-up period was 38.8±10.3 months. The mean age of 1708 patients was 56.7±12.3 years, and 1370 (80.2) of the patients were male. Lower PNI was associated with MVD (+). Mortality was observed more in the MVD (+) group (p

  • Open Access

    The Relationship Between C-reactive Protein Albumin Ratio and Long-Term Mortality in Patients With Acute Coronary Syndrome

    by Oğuzhan Birdal

    Background Coronary artery disease (CAD) is one of the leading causes of death worldwide. CRP/albumin ratio is a sensitive indicator of inflammatory status. It has been shown that this parameter may be associated with poor short-term outcomes in CAD. In this study, we investigated the relationship between long-term mortality and the CRP/albumin ratio in patients with acute coronary syndromes (ACS). Material and methods This study was conducted on patients who applied to our hospital between January 2015 and December 2019 and were diagnosed with ACS. A total of 1689 patients were included in the study. Patients were divided into two groups according to mortality status, and long-term mortality predictors were investigated. Results The average follow-up period was 38.9±10.3 months. The mean age of the entire study group was 56.6±12.2 years, and 1440 (80.5%) of the patients were male. Comorbid diseases and blood parameters were significant between the two groups. In the regression analysis, creatine, hemoglobin, white blood cell count (WBC), neutrophil-lymphocyte ratio (NLR), and CRP albumin ratio (CAR) were found to be independent predictors. In the ROC analysis, it was observed that CAR had the best predictive value. Discussion An increased CAR level is an independent predictor of long-term mortality in ACS patients. It can be used in both short-term and long-term risk stratification for ACS patients.


  • CTRP4 attenuates apoptosis and epithelial-mesenchymal transition markers in podocytes through an AMPK/autophagy-dependent pathway

    by Wonjun Cho, Heeseung Oh, Sung Woo Choi, A.M. Abd El-Aty, Oğuzhan Birdal, Ji Hoon Jeong, Jin-Ho Song, Tae Woo Jung