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Browsing by Author "Caliskan, Mustafa"

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    Article
    Can the Efficacy of a Medical Treatment Be Predicted Based on the Type of Idiopathic Premature Ventricular Contraction
    (Churchill Livingstone inc Medical Publishers, 2024) Atici, Adem; Sahin, Irfan; Dogan, Omer; Barman, Hasan Ali; Kup, Ayhan; Celik, Mehmet; Caliskan, Mustafa
    Background: Premature ventricular contractions (PVCs) are common arrhythmias with diverse clinical implications. This retrospective study aimed to evaluate the efficacy of medical treatments using various clinical, imaging, and electrocardiographic parameters in patients with idiopathic PVCs. Methods: A total of 1051 patients with idiopathic PVCs were retrospectively analyzed. Patients were categorized into three groups based on treatment response: beta-blocker (BB) responders (479 patients), calcium-channel blocker (CCB) responders (335 patients), and class 1c antiarrhythmic (AA) responders (237 patients). Clinical, imaging, and electrocardiographic data were collected and analyzed to assess the factors influencing treatment response. Results: Age, left ventricular ejection fraction (LVEF), PVC QRS duration, CI variability, and multiple PVC morphologies were identified as significant factors affecting treatment response. Older age and lower LVEF were associated with better response to BB treatment, whereas CCB responders showed narrower QRS complexes. BB responders also exhibited higher CI variability, possibly linked to automaticity mechanisms. Moreover, the BB responder group had a higher frequency of multiple PVC morphologies. Conclusion: These findings emphasize the importance of tailored treatment approaches based on individual patient characteristics.
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    Article
    The Nexus Between Renewable Energy, Co2 Emissions, and Economic Growth: Empirical Evidence From African Oil-Producing Countries
    (Elsevier, 2022) Inal, Veysel; Addi, Haman Mahamat; Cakmak, Eyup Ensar; Torusdag, Mustafa; Caliskan, Mustafa
    Despite Africa's reserves of renewable energy, policymakers rely on traditional energy sources to improve macroeconomic outcomes, thus contributing to global warming. We investigated the relationship between renewable energy, CO2 emissions, and growth in oil-producing Angola, Algeria, Equatorial Guinea, Egypt, Gabon, Congo Republic, Libya, Nigeria, and Sudan from 1990-2014 using a second-generation panel data analysis. Our motivation was to demonstrate Africa's growing CO2 emissions (doubled in 20 years) and influence on global warming and also influence on African oil-producing countries' growth performance. Our objective was to analyze how renewable energy and CO2 emissions contribute to economic growth. We employed a bootstrap panel LM cointegration-accounting for the horizontal cross-sectional dependency-the AMG estimator to analyze cointegration coefficients, and the country-based Konya panel causality test. Our findings showed no significant effect of renewable energy on economic growth, confirming the neutrality hypothesis. One reason may relate to the under-utilization of their renewable energy potential by these countries. The results reveal a significantly positive effect of CO2 emissions on growth for Algeria, Equatorial Guinea, and Egypt. Hence, we recommend that policymakers pay more attention to renewable energy. An extension of our research could determine the optimum mixture of renewable and traditional energy production that would guarantee economic growth while reducing global warming. (c) 2021 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).