Browsing by Author "Karaduman, M."

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An Automated User-Friendly Software for Fast Computation of Blood Flow Velocity From Coronary Angiographic Images
(SAGE Publications Inc., 2025) Çap, M.; Karaduman, M.; Zhou, T.; Erdoğan, E.; Tanboğa, İ.H.; Tufaro, V.; Bourantas, C.V.
Thrombolysis in myocardial infarction frame count enables assessment of coronary flow but cannot measure coronary flow velocity (CFV), which is needed to examine microvascular function. To overcome this limitation, we introduce a semi-automated software for fast CFV computation using contrast bolus tracking techniques in angiography and compare its performance against experts. The study included patients undergoing coronary angiography. Two experts measured the CFV using the number of frames, segment length, and frame rate. Measurements were repeated for shorter segments and different projections, and their estimations were compared with the software. In total, 123 patients (152 vessels) were included. The software had excellent reproducibility in measuring CFV (intraclass correlation coefficient (ICC) =.995), which was superior to experts (ICC =.946) and provided similar estimations irrespective of the segment length (ICC =.992); conversely, the experts overestimated CFV in short segments. The reproducibility of the experts and the software was moderate when comparing CFV measurements in different projections (first expert vs software ICC =.807, second expert vs software ICC =.790, first expert vs second expert ICC =.885). The software provides reproducible CFV estimations that are close to experts’ estimations. Further validation against wire-based functional techniques is needed to examine its potential in assessing microvascular function. © The Author(s) 2025.
Evaluation of Cardiology Consultations During the Covid-19 Pandemic Period
(Yuzuncu Yil Universitesi Tip Fakultesi, 2021) Babat, N.; Duz, R.; Karaduman, M.; Tuncer, M.
In this study, we scientifically examined the consultations of the patients being hospitalized from the other departments to the cardiology department during Coronavirus Disease 2019 (COVID-19) pandemia. Consultations to the cardiology department between 01 April-31 May 2020 and 01 April-31 May 2019 were discussed. Demographic characteristics and reasons of consultations were compared. A different approach was f ollowed in COVID-19 patients diagnosed with compared to patients in other clinics. The rate of consulted patients in 2019 year was 14.4% (866/5989). Its rate in 2020 year was found as 18.5% (462/2486) (p: <0.001). A statistically significant difference was obtained in both groups. The use of drugs prolonging the Qt, preoperative and increase in cardiac enzymes were found statistically significant in terms of the consultations (p: <0.001-<0.001-0.003-0.016, respectively). Face to face interviews were made in 29% (33/114) of the patients who were consulted from COVİD-19 clinics. In 71% (81/114) patients, electrocardiography (ECG) s were evaluated digitally. In this study, although there was a decrease in the number of hospitalized patients during the COVİD-19 pandemia, we observed an increase in the number of patients being consulted to cardiology clinic. The relationship between COVİD-19 disease and cardiovascular diseases and drugs being used in the treatment increased the workload of the cardiology clinic during the pandemic period. © 2021, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
Management of Patients With Pulmonary Hypertension in Covid-19 Pandemic
(Yuzuncu Yil Universitesi Tip Fakultesi, 2022) Aşkar, M.; Aşkar, S.; Karaduman, M.; Çoldur, R.
The new coronavirus (COVID-19) epidemic caused by SARS-CoV-2 has emerged as perhaps the biggest medical problem of our century. Although COVID-19 mainly affects the lungs, it also affects many organs, especially the cardiovascular system. Pulmonary hypertension (PH) is a pulmonary vascular disease described by pulmonary arterial vasoconstriction and remodeling, which may lead to an increased pulmonary artery pressure with varying clinical course and severity depending on the etiology and eventually to right heart failure. Because of associated comorbidities, patients with PH are likely to face a potential risk of severe complications and mortality and unfortunately, they may have worse outcomes than other patients. The COVID-19 pandemic has brought us new and different challenges in the follow-up and treatment processes of patients with PH. For patients admitting to the hospital, it is important to balance the risk of exposure to COVID-19 with ongoing care and treatment services. However, the COVID-19 outbreak has brought serious challenges to PH centers to weigh the risks and benefits of diagnostic research, including potential exposure to COVID-19, and the timing of initiation of PH-specific treatment in high-risk patients. In this article, the management of PH patients during the COVID-19 pandemic; problems encountered in diagnosis, clinical follow-up and treatment processes; the different difficulties experienced during hospitalizations have been compiled. © 2022, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
P Wave Dispersion in Covid-19
(Yuzuncu Yil Universitesi Tip Fakultesi, 2022) Tuncer, M.; Öztürk, F.; Çoldur, R.; Karaduman, M.; Güneş, Y.
The effects of COVID-19 on the heart are still not fully known. In this study, we investigated how COVID-19 affects the P interval. Electrocardiographies (ECG) of 30 COVID-19 patients and the control group consisting of 23 healthy volunteers were examined and dispersion (Pd) of the P wave was calculated. Compared to control group mean Pd ( 40,1±6,6 vs. 49,6±11,5, p=0,006) values were significantly higher in Covid19 patients. Increased Pd was observed as an indication that COVID-19 affects the atriums. © 2022, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
Performance Comparisons of Optimization Algorithms
(Institute of Electrical and Electronics Engineers Inc., 2019) Inan, M.; Karaduman, M.; Karci, A.
Optimization methods are applied to many different problems. While these methods do not guarantee a definite end result, they give a solution that is close to the best result in a reasonable time. Optimization methods are classified as physical, social, music, herd, chemistry, biology and hybrid methods when classified according to the sources they are influenced by. In this study, it is aimed to compare the 5 methods of swarm optimization algorithm methods under the same conditions and applying the same probing. Thus, it is possible to determine the method that obtains the best values in terms of result and speed, and gives the fastest result. For this purpose, cat swarm optimization, whale swarm optimization, cricket algorithm, crow search optimization and salp optimization methods have been determined. When the result obtained from the comparison is evaluated, the best calculation time of the calculations for all functions is done with crow search optimization, the best results are obtained with whale swarm optimization for Ackley, salp optimization methods for Bukin N 6 and crow search optimization for Rastrigin. © 2018 IEEE.