Volkan Emren

Dr. Volkan Emren

orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

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

Representative Publications

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19 February 2017 in Clinical and Applied Thrombosis/Hemostasis
Verified
Journal Article
Closed access
VEVolkan Emren
Volkan Emren
OŞOktay Şenöz
Oktay Şenöz
MBMurat Bilgin
Murat Bilgin
OBOsman Beton
Osman Beton
AAAbdullah Aslan
Abdullah Aslan
MZMehdi Zoghi
Mehdi Zoghi
Adherence to non-vitamin K antagonist oral anticoagulants (NOACs) is an important factor for ensuring efficacy and safety in nonvalvular atrial fibrillation (NVAF). There are controversial results regarding NOAC adherence in real-world data and there are no data about NOAC adherence in Turkish population. This study investigated the NOAC adherence based on self-report, factors affecting nonadherence, and the relation of the adherence level with efficacy and safety outcomes. This multicenter cross-sectional study included 2738 patients (59% female) using NOAC (dabigatran, apixaban, and rivaroxaban) due to NVAF for more than 3 months with >30 days of supply between September 1, 2015, and February 28, 2016. To measure the adherence level, an 8-item Morisky Medication Adherence Scale was used. The mean age of the patients was 70 ± 10 years. Of the 2738 patients, 44% were receiving dabigatran, 38% rivaroxaban, and 18% apixaban. A total of 630 (23%) patients had high medication adherence, 712 (26%) moderate adherence, and 1396 (51%) low adherence. Nonadherence had related to stroke (5.6% vs 2.5%, P < .001) and minor (21.2% vs 11.1%, P < .001) and major (6.1% vs 3.7%, P = .004) bleeding rates. The adherence to NOAC was found to be quite low in Turkey. Nonadherence is associated with bleeding and thromboembolic cardiovascular events. Age, taking NOAC twice a day, and the additional noncardiac diseases, depression, and dementia were the independent factors affecting poor medication adherence.

22 August 2016 in Polish Heart Journal
Verified
Journal Article
Closed access
VEVolkan Emren
Volkan Emren
MAMustafa Aldemir
Mustafa Aldemir
HDHamza Duygu
Hamza Duygu
UKUğur Kocabaş
Uğur Kocabaş
ETEvren Tecer
Evren Tecer
NENevzat Erdil
Nevzat Erdil
Atrial fibrillation (AF) after coronary artery bypass graft (CABG) surgery is associated with increased morbidity and mortality. The HATCH score was originally devised to predict the progression of paroxysmal AF to persistent AF. To determine whether the HATCH score predicts the development of AF after CABG surgery. The medical records of 284 consecutive patients, who underwent CABG surgery between January 2013 and December 2014, were retrospectively reviewed for the development of AF in the postoperative (POAF) period. The HATCH score, and clinical and echocardiographic parameters were evaluated for all patients. Seventy (25%) patients developed POAF. The HATCH scores were higher in the POAF group (2.8 ± 1.8 vs. 1.1 ± 1.2, p < 0.001). The area of the HATCH score under the curve in the receiver operating characteristics analysis was 773 (95% CI 706-841, p < 0.001). When the HATCH score was 2 or more as a threshold, there was for POAF 72% sensitivity and 75% specificity. The results of the present study suggest that the HATCH score can be used to predict the development of POAF.

2 September 2014 in Journal of Cardiothoracic Surgery
Verified
Journal Article
Open access
PDF file
ZEZeynep YAPAN EMREN
Zeynep YAPAN EMREN
VEVolkan Emren
Volkan Emren
BKBarış Kılıçaslan
Barış Kılıçaslan
HSHatice Solmaz
Hatice Solmaz
ISİbRahim Susam
İbRahim Susam
ÖBÖzgür Bayturan
Özgür Bayturan
The aim of the present study was to retrospectively evaluate the prevalence of concurrent coronary artery disease in patients who underwent surgery due to severe valvular heart disease. The study also investigated the association of coronary artery disease with the type of valvular heart disease. A total of 241 patients (123 females [51%]), who had underwent single valvular heart surgery, were included in the study. The patients who underwent valve replacement surgery were divided into four groups: patients with severe mitral stenosis (MS), patients with severe mitral regurgitation (MR), patients with severe aortic regurgitation (AR), and patients with severe aortic stenosis (AS). Age, DM, HT, history of smoking, and LDL values were recorded as the risk factors for CAD. Coronary artery disease was detected in 26.4% of patients with mitral stenosis and 57.7% of patients with aortic stenosis. Of the patients with mitral insufficiency, 41.9% had CAD, and 44.4% of the patients with aortic insufficiency had CAD. The comparison of MS and AS groups revealed significantly higher prevalence of CAD in the AS group. There was no statistically significant difference between the MR and AR groups in terms of the prevalence of CAD. The comparison of MS and MR groups revealed significantly higher prevalence of CAD in the MR group. Furthermore, the comparison of these groups in terms of the extensiveness of the coronary artery disease revealed significantly higher Gensini score in the MR group.

9 September 2016 in Polish Heart Journal
Verified
Journal Article
Closed access
VEVolkan Emren
Volkan Emren
UKUğur Kocabaş
Uğur Kocabaş
HDHamza Duygu
Hamza Duygu
FLFatih Levent
Fatih Levent
EŞErsin Çağrı Şimşek
Ersin Çağrı Şimşek
STSelcen Tülüce
Selcen Tülüce
HATCH score is useful in predicting short-term success of EC at early stages for patients with AF, for whom the use of a rhythm-control strategy is planned.

20 May 2018 in Biomolecules and Biomedicine
Verified
Journal Article
Open access
PDF file
VEVolkan Emren
Volkan Emren
MZMehdi Zoghi
Mehdi Zoghi
RBRida Berilgen
Rida Berilgen
IÖİbRahim Halil Özdemir
İbRahim Halil Özdemir
OÇOğuzhan Çelik
Oğuzhan Çelik
OEOktay Ergene
Oktay Ergene
Once-daily dosing of non-vitamin K antagonist oral anticoagulants (NOACs) may increase patient adherence to treatment but may also be associated with a higher risk of bleeding. In this study, we investigated the adherence to once- or twice-daily dosing of NOACs and the risk of bleeding in nonvalvular atrial fibrillation (NVAF) patients. This multicenter cross-sectional study, conducted between 1 September 2015 and 28 February 2016, included 2214 patients receiving NOACs for at least 3 months, due to NVAF. Patients receiving once-daily or twice-daily NOAC doses were 1:1 propensity score matched for baseline demographic characteristics and the presence of other diseases. The medication adherence was assessed by the 8-item Morisky Medication Adherence Scale. Risk factors were investigated in relation to minor and major bleeding. The mean age of patients was 71 ± 10 years, and 53% of the patients were women. The medication adherence was lower in patients receiving twice-daily NOAC doses compared to once-daily-dose group (47% versus 53%, p = 0.001), and there was no difference between the groups in terms of minor (15% versus 16%, p = 0.292) and major bleeding (3% versus 3%, p = 0.796). Independent risk factors for bleeding were non-adherence to medication (OR: 1.62, 95% CI: 1.23–2.14, p = 0.001), presence of 3 or more other diseases (OR: 10.3, 95% CI: 5.3–20.3, p < 0.001), and HAS-BLED (Hypertension, Abnormal renal and liver function, Stroke, Bleeding, Labile INR, Elderly, Drugs or alcohol) score (OR: 4.84, 95% CI: 4.04–5.8, p < 0.001). In summary, the once-daily dose of NOACs was associated with increased patient adherence to medication, while it was not associated with bleeding complications.

8 August 2023 in Angiology
Verified
Journal Article
Closed access
OSOzgen Safak
Ozgen Safak
TYTarik Yildirim
Tarik Yildirim
VEVolkan Emren
Volkan Emren
EAEyup Avci
Eyup Avci
OAONUR ARGAN
ONUR ARGAN
HKHalil Lutfi Kisacik
Halil Lutfi Kisacik
Nutritional status and its index (Prognostic Nutritional Index, PNI) is an important prognostic factor for ST-segment elevation myocardial infarction (STEMI). The present study investigated whether PNI it is associated with no-reflow in patients with STEMI. In this retrospective study, 404 patients with STEMI and underwent primary percutaneous coronary intervention (pPCI) were consecutively included, between January 2016 and December 2018. No-reflow phenomenon (NRP) was detected in 103 (25.4%) patients. In multivariate logistic regression analysis C-reactive protein (CRP) (odds ratio (OR): 1.693, 95% confidence interval (CI): 1.126–2.547, P = .011), left ventricle ejection fraction (LVEF) (OR: 0.777, 95% CI: 0.678–0.891, P < .001), SYNTAX score (OR: 1.114, 95% CI: 1.050–1.183, P = .001), low density lipoprotein cholesterol (LDL-C) (OR: 1.033, 95% CI: 1.013–1.055, P = .002), hemoglobin level (OR: 0.572, 95% CI: 0.395–0.827, P = .003), PNI (OR: 0.554, 95% CI: 0.448–0.686, P < .001) were associated with NRP. The area under curve of PNI was significantly higher than albumin (z = 4.747, P < .001) and lymphocyte values (z = 3.481 P < .001). PNI was associated with no-reflow occurrence and mortality. So, PNI may be useful to predict NRP risk in patients with STEMI before pPCI.