Sezgin KEHAYA

Dr. Sezgin KEHAYA

orcid

Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

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

Representative Publications

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1 August 2016 in Neurological Research
Verified
Journal Article
Closed access
SKSezgin KEHAYA
Sezgin KEHAYA
ATAslan Tekatas
Aslan Tekatas
ÖAÖzer Aynacı
Özer Aynacı
UUUfuk Utku
Ufuk Utku
VSVolkan Solmaz
Volkan Solmaz
Background: The aim of this study was to compare the differences in risk factors and prognosis between acute stroke caused by definitive intracranial atherosclerosis (ICAS) or extracranial atherosclerosis (ECAS) in the Turkısh population. Methods: This study was prospectively designed in a single centre and conducted with patients who were hospitalised due to acute ischaemic stroke. Inclusion criteria were the diagnosis of atherosclerotic ischaemic stroke, defined as more than 50% stenosis or occlusion in the arterial structure supplying the ischaemic area, having excluded other possible causes. Results: Information on 58 ICAS and 57 ECAS stroke patients was collected in a 13-month period. The ECAS patients had male gender predominance (p = 0.003). Ageing, stroke history and hyperlipidaemia were related with stroke severity in ECAS, and gender was associated with severity in ICAS. Hypertension and being female were related with poor prognosis in ICAS (p = 0.081 vs. 0.087). Congestive heart failure (p = 0.002) was associated with poor prognosis and alcohol with a favourable outcome (p = 0.087) in ECAS. Stroke severity was related with poor prognosis in both groups (p < 0.001). Conclusions: The prevalence of risk factors differs between ICAS and ECAS, and their influence differs for stroke severity and prognosis.

1 January 2013 in Ağrı - The Journal of The Turkish Society of Algology
Verified
Journal Article
Closed access
SGSibel Guler
Sibel Guler
CDCigdem Deniz
Cigdem Deniz
UUUfuk Utku
Ufuk Utku
SKSezgin KEHAYA
Sezgin KEHAYA
Spontaneous intracranial hypotension was first described by Schalternbarn. Severe complications like cerebral venous thrombosis and subdural hemorrhage are seldomly seen. A 40-year-old man was examined for weakness of right arm started 9 months earlier and aggravated in last 3 months. He was undergo a lumbar punction because of a demyelinating plaque at C2 level in MRI. After 10 days of lumbar punction he experienced a generalised tonic clonic seizure. At cranial MRI and venography thrombosed superior sagittal and right transverse sinus and image of pachymeningitis, caused by intracranial hypotension were observed. Coincidence of these two situations together was seldomly found at literature. Thrombosis can both effect the sinuses and cortical veins. Spontaneous intracranial hypotension is a risk factor for CVT, but at only 2% CVT is seen as a complication. We think that our case can add addition to literature by having this coincidence.

4 February 2019 in Medicina
Verified
Journal Article
Open access
PDF file
MGMuhammet GURDOGAN
Muhammet GURDOGAN
SKSezgin KEHAYA
Sezgin KEHAYA
SKSelcuk Korkmaz
Selcuk Korkmaz
SAServet Altay
Servet Altay
UÖUĞUR ÖZKAN
UĞUR ÖZKAN
ÇKÇağlar Kaya
Çağlar Kaya
Background and objectives: Cranial magnetic resonance imaging findings of patients considered to be cryptogenic stroke may be useful in determining the clinical and prognostic significance of arrhythmias, such as atrial premature beats and atrial run attacks, that are frequently encountered in rhythm Holter analysis. This study was conducted to investigate the relationship between short atrial runs and frequent premature atrial contractions detected in Holter monitors and infarct distributions in cranial magnetic resonance imaging of patients diagnosed with cryptogenic stroke. Materials and Methods: We enrolled the patients with acute ischemic stroke whose etiology were undetermined. We divided the patients in two groups according to diffusion-weighted magnetic resonance imaging as single or multiple vascular territory acute infarcts. The demographic, clinical, laboratory, echocardiographic, and rhythm Holter analyses were compared. Results: The study investigated 106 patients diagnosed with cryptogenic stroke. Acute cerebral infarctions were detected in 31% of the investigated patients in multiple territories and in 69% in a single territory. In multivariate logistic regression analysis, the total premature atrial contraction count (OR = 1.002, 95% CI: 1.001–1.004, p = 0.001) and short atrial run count (OR = 1.086, 95% CI: 1.021–1.155, p = 0.008) were found as independent variables that could distinguish between infarctions in a single or in multiple vascular territories. Conclusions: Rhythm Holter monitoring of patients with infarcts detected in multiple vascular territories showed significantly higher premature atrial contractions and short atrial run attacks. More effort should be devoted to the identification of cardioembolic etiology in cryptogenic stroke patients with concurrent acute infarcts in the multiple vascular territories of the brain.

18 August 2021 in Immunological Investigations
Verified
Journal Article
Closed access
NANevra Alkanlı
Nevra Alkanlı
AAARZU AY
ARZU AY
SKSezgin KEHAYA
Sezgin KEHAYA
NSNecdet Sut
Necdet Sut
Background Ischemic stroke is a clinical condition characterized by focal or global cerebral dysfunction resulting from inhibition of brain blood flow. Genetic factors play an important role in the pathogenesis of ischemic stroke. As a result of IL-18 (-607 C/A, -137 G/C) gene variations, it is thought that binding of transcription factors may be affected and IL-18 mRNA expression can be modulated. Therefore, the purpose of our study is to investigate the roles of IL-18 (-607 C/A), IL-18 (-137 G/C) gene variations in the development of ischemic stroke in Trakya Region of Turkey. Methods Our study was performed with 90 ischemic stroke patients and 89 healthy controls. Genotype distributions of IL-18 (-607 C/A, -137 G/C) gene variations were determined using polymerase chain reaction (PCR) method. Results GC genotype and CA genotype of IL-18 (-137 G/C) and IL-18 (-607 C/A) gene variations were determined higher significantly in patent group as compared with other genotypes. However, the statistically significant difference was not determined between patients with ischemic stroke and healthy control groups in terms of IL-18 (-137 G/C) and IL-18 (-607 C/A) gene variations (p> 0,05). Allele frequencies of IL-18 (-137 G/C) and IL-18 (-607 C/A) in patient and control groups were significantly different from the Hardy-Weinberg distribution (p< .001 for all). Conclusion Although these gene variations' genotype distributions were not determined as a genetic risk factor for the development of ischemic stroke, allele frequencies of IL-18 (-137 G/C) and IL-18 (-607 C/A) in patient and control groups were significantly different from the Hardy-Weinberg distribution.

1 January 2019 in Ideggyogyaszati Szemle
Verified
Journal Article
Closed access
OAOzer Aynaci
Ozer Aynaci
ATAslan Tekataş
Aslan Tekataş
GAGÜLDEN AYNACI
GÜLDEN AYNACI
SKSezgin KEHAYA
Sezgin KEHAYA
UUUfuk Utku
Ufuk Utku
Introduction - The aim of this study is to evaluate utility of CHADS2 score to estimate stroke severity and prognosis in patients with ischemic stroke due to non-valvular atrial fibrillation (AF) in addition to evaluate effects of hematologic and echocardiographic findings on stroke severity and prognosis. Methods - This prospective study included 156 ischemic stroke cases due to non-valvular AF in neurology ward of Trakya University Medical School between March 2013-March 2015. National Institute of Health Stroke (NIHS) score was used to evaluate severity of stroke at admission. Carotid and vertebral Doppler ultrasonography findings, brain computed tomography (CT) and magnetic resonance imaging (MRI) of the cases were evaluated. Left atrial diameter and ejection fraction (EF) values were measured. CHADS2 score was calculated. Modified Rankin Scale was used to rate the degree of dependence. Effects of age and sex of the patients, presence of diabetes mellitus (DM), Congestive Heart Failure (CHF), Cerebrovascular Disease (CVD) and C-reactive protein (CRP) levels on CHADS2, NIHS, and mRS were evaluated. Results - In patients with age >= 75, mean NIHS score was 3.3 points and mean mRS score was 1.02 points higher, than in patient below 75 years of age. Compared with the mild risk group, cases in the high risk group had older age, higher serum D-dimer, fibrinogen and CRP levels and lower EF. A positive relation was detected between stroke severity and Hemorrhagic Transformation (HT), previous CVD history, and presence of CHF. A significant association was found between increased stroke severity and Early Neurological Deterioration (END) development. Older age, higher serum fibrinogen, D-dimer, CRP and lower EF values were associated with poor prognosis. History of CVD and presence of CHF were associated with poor prognosis. END development was found to be associated with poor prognosis. In the high-risk group, 30.3% (n = 33) had END. Among those in the high-risk group according to the CHADS2 score, END development rate was found to be significantly higher than in the moderate risk group (p < 0.05). There was a strong positive correlation between CHADS2 and NIHS scores. mRS score increased with increasing CHADS2 score and there was a strong correlation between them. Effect of stroke severity on prognosis was assessed and a positive correlation was found between NIHS score and mRS value. Discussion - Our study demonstrated the importance of CHADS2 score, haemostatic activation and echocardiographic findings to assess stroke severity and prognosis. Knowing factors which affect stroke severity and prognosis in patients with ischemic stroke may be directive to decide primary prevention and stroke management.

1 January 2021 in The Eurasian Journal of Medicine
Verified
Journal Article
Open access
SKSezgin KEHAYA
Sezgin KEHAYA
Objective: Stroke is the second cause of mortality and the third cause of disability worldwide in adults. There is no published data about stroke in Agrı.We aim to define stroke subtypes and associated risk factors. Thus, we can be aware of stroke burden in rural areas and can develop strategies to reduce the stroke risk. Materials and Methods: Records of Agrı State Hospital were investigated for a period of 3 years retrospectively. Patients were divided to ischemic and hemorrhagic stroke groups. Hemorrhagic strokes were classified as subarachnoid hemorrhage (SAH) and intracerebral hemorrhage (ICH). Ischemic strokes were classified according to localization and etiology. Vascular risk factors for ischemic stroke were assessed and compared between groups. The differences between variables were evaluated using Pearson κi square test and one-way ANOVA. Results: There were 1246 patients evaluated for stroke in Emergency Department and 525 (42% of prediagnosis) patients were diagnosed as stroke. There were 25.3% hemorrhagic (5.1% SAH and 20.1% ICH) versus 74.6% ischemic stroke. Intensive care required for 61.6% of hemorrhagic and 22.4% of ischemic patients. The most prevalent localization was partial anterior circulation infarction, and the most known etiology was cardioembolism after unknown cause in ischemic strokes. The most encountered risk factor was hypertension (HT). Coronary artery disease history, HT, and atrial fibrillation (AF) were risk factors for recurrent stroke (P = .001). Conclusion: Stroke types in Agrı resembles more to Asian population than Europe. Awareness for stroke, HT, and AF treatment could be the primary targets for stroke reduction in underdeveloped regions. Cite this article as: Kehaya S. Stroke burden in agrı: stroke situation in underdeveloped region of Turkey. Eurasian J Med. 2021; 53(3):174–179