Mehmet Zulkuf Karahan

Dr. Mehmet Zulkuf Karahan

orcid

Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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13 September 2024 in Acta Cardiologica
Verified
Journal Article
Closed access
RKRaif Kılıç
Raif Kılıç
TGTuncay Güzel
Tuncay Güzel
AAAdem Aktan
Adem Aktan
HGHamdullah Güzel
Hamdullah Güzel
Ahmet Ferhat KayaAhmet Ferhat Kaya
Ahmet Ferhat Kaya
MKMehmet Zulkuf Karahan
Mehmet Zulkuf Karahan
Sarcopenia is a progressive age-related skeletal muscle disease associated with adverse outcomes in those with cardiovascular disease. In this study, the prevalence of sarcopenia and its effect on clinical outcomes in heart failure with mildly reduced ejection fraction (HFmrEF) patients were examined. A total of 722 patients from three centres who applied to the outpatient clinic with the diagnosis of HFmrEF between 01 January 2020 and 01 June 2021 were included in the study retrospectively. Sarcopenia was diagnosed with a screening test using age, grip srength and calf circumference. At least two-year follow-up results were reviewed from the date the patients were included in the study. Of the 722 HFmrEF patients, 169 (23.4%) were sarcopenic. During the follow-up of sarcopenic patients, a higher rate of hospitalisation and two-year mortality was detected compared to the non-sarcopenic group (49.7% vs 33.3%, p < .001 and 23.7% vs 13.2%, p = .001, respectively). Additionally, atrial fibrillation (AF), chronic obstructive pulmonary disease (COPD), chronic renal failure (CRF) and smoking were detected at higher rates in sarcopenic patients. In subgroup analysis, AF was found to be significantly higher in overweight/obese sarcopenia patients compared to other groups. According to Receiver operating characteristic (ROC) analysis, the sarcopenia score cut-off of 73.61 predicted mortality with 65% sensitivity and 63% specificity, and the cut-off level of 71.10 predicted hospitalisation with 68% sensitivity and 69% specificity. In HFmrEF patients, sarcopenia is associated with adverse events and is an important prognostic marker.

1 January 2023 in Revista da Associação Médica Brasileira
Verified
Journal Article
Open access
PDF file
RKRaif Kılıç
Raif Kılıç
TGTuncay Güzel
Tuncay Güzel
AAAdem Aktan
Adem Aktan
BABayram Arslan
Bayram Arslan
MAMuzaffer ASLAN
Muzaffer ASLAN
MKMehmet Zulkuf Karahan
Mehmet Zulkuf Karahan
The aim of our study was to compare the traditional radial artery, distal radial artery, and transfemoral artery, which are vascular access sites for coronary angiography, in terms of pain level using the visual analog scale.

1 August 2015 in Therapeutics and Clinical Risk Management
Verified
Journal Article
Open access
PDF file
YAYakup Altas
Yakup Altas
EKErtugrul Kurtoglu
Ertugrul Kurtoglu
BYBaris Yaylak
Baris Yaylak
EBErkan Baysal
Erkan Baysal
BUBerzal Ucaman
Berzal Ucaman
USUtkan Sevuk
Utkan Sevuk
Aim: The pathophysiology of slow coronary flow (SCF) involves atherosclerosis, small vessel dysfunction, platelet function disorders, and inflammation. It has been known that eosinophils also play a significant role in inflammation, vasoconstriction, thrombosis, and endothelial dysfunction. We propose to evaluate the relationship between eosinophilia and SCF. Methods: All patients who underwent coronary angiography between January 2011 and December 2013 were screened retrospectively. Of 6,832 patients, 102 patients with SCF (66 males, mean age 52.2±11.7 years) and 77 control subjects with normal coronary angiography (50 males, mean age 50.7±8.1 years) were detected. Baseline characteristics, hematological test results, and biochemical test results were obtained from the hospital database. Results: Baseline characteristics of the study groups were comparable between groups. There was no significant difference between groups regarding leukocyte count, paletelet count, and mean platelet volume. However, patients with SCF had a higher eosinophil count than the controls (0.24±0.17×103/µL vs 0.16±0.15×103/µL, P=0.002). In addition, eosinophil count was found to be correlated with thrombolysis in myocardial infarction (TIMI) frame count in the SCF group (r=0.3, P<0.01). There was no significant correlation between eosinophil count and the number of coronary arteries showing slow flow. Conclusion: Patients with SCF have higher blood eosinophil count, and this may play an important role in the pathogenesis of SCF. Elevated baseline eosinophil count may indicate the presence of SCF.

9 June 2021 in International Journal Of Clinical Practice
Verified
Journal Article
Open access
PDF file
BABurhan Aslan
Burhan Aslan
AAAbdurrahman Akyüz
Abdurrahman Akyüz
FIFerhat Işık
Ferhat Işık
MÇMurat Çap
Murat Çap
ÜIÜmit İnCi
Ümit İnCi
BBBedrettin Boyraz
Bedrettin Boyraz
Background Recent findings indicate that thrombosis is one of the underlying pathophysiology and complication of COVID-19 infection. Therefore, the prognosis of the disease may be more favourable in people who were under oral anticoagulant treatment before the COVID-19 diagnosis. This study aims to evaluate the effects of chronic DOAC use on ICU admission and mortality in hospitalized patients due to COVID-19 infection. Method Between 1 September and 30 November 2020, 2760 patients hospitalized in our hospital due to COVID-19 were screened. A total of 1710 patients who met the inclusion criteria were included in the study. The patients were divided into two groups as those who use DOAC due to any cardiovascular disease before the COVID-19 infection and those who do not. Results Seventy-nine patients were enrolled in the DOAC group and 1631 patients in the non-DOAC group. Median age of all study patient was 62 (52-71 IQR) and 860 (50.5%) of them were female. The need for intensive care, in-hospital stay, and mechanical ventilation were observed at higher rates in the DOAC group. Mortality was observed in 23 patients (29%) in the DOAC group, and it was statistically higher in the DOAC group (P = .002). In the multivariable analysis, age (OR: 1.047, CI: 1.02-1.06, P < .001), male gender (OR: 1.8, CI: 1.3-2.7, P = .02), lymphocyte count (OR: 0.45, CI: 0.30-0.69, P < .001), procalcitonin (OR: 1.12, CI: 1.02-1.23, P = .015), SaO2 (OR: 0.8, CI: 0.77-0.82, P < .001) and creatinine (OR: 2.59, CI: 1.3-5.1, P = .006) were found to be associated with in-hospital mortality. DOAC treatment was not found to be associated with lower in-hospital mortality in multivariable analysis (OR:1.17, CI: 0.20-6.60, P = .850). Conclusion Our study showed that the use of DOAC prior to hospitalization had no protective effect on in-hospital mortality and intensive care need in hospitalized COVID-19 patients.

20 January 2023 in Journal of Electrocardiology
Verified
Journal Article
Closed access
MKMehmet Zulkuf Karahan
Mehmet Zulkuf Karahan
AAAdem Aktan
Adem Aktan
TGTuncay Güzel
Tuncay Güzel
SGSerhat Günlü
Serhat Günlü
RKRaif Kılıç
Raif Kılıç

22 April 2022 in Acta Cardiologica
Verified
Journal Article
Closed access
ÖBÖnder Bilge
Önder Bilge
MÇMurat Çap
Murat Çap
FKFerat Kepenek
Ferat Kepenek
EEEmrah Erdogan
Emrah Erdogan
İTİsmail Tatlı
İsmail Tatlı
İTİbrahim Halil Tanboğa
İbrahim Halil Tanboğa
Thrombolysis in Myocardial Infarction Frame Count (TFC) is an index that provides a quantitative evaluation of coronary microvascular dysfunction. In this study, we aimed to examine the effect of C...