Ahmet Tiryaki
Karadeniz Technical University
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Featured researches published by Ahmet Tiryaki.
Comprehensive Psychiatry | 2010
Ahmet Tiryaki; Evrim Özkorumak
OBJECTIVE Schizophrenia presents with different symptom domains and functionality during its course. Obsessive-compulsive (OC) symptoms in schizophrenia have many themes to be clarified. Our aim was to compare schizophrenia patients with and without OC symptoms in terms of symptom domains, cognitive functions, and quality of life. METHOD Sixty-two patients who met schizophrenia diagnosis were assessed with Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition consecutively over a period of 12 months in the setting of an outpatient clinic at medical university hospital. Yale-Brown Obsessive-Compulsive Scale, Scale for the Assessment of Negative Symptoms, Scale for the Assessment of Positive Symptoms, and neuropsychologic tests were used. Quality of life was assessed with Quality of Life Scale for Patients with Schizophrenia. RESULTS Obsessive-compulsive symptoms along with schizophrenia were present in a considerable number in our sample (35.5%). Level of psychotic symptoms was more severe and quality of life was lower in schizophrenia patients with OC symptoms. A positive correlation was found between obsessions and delusions. Moreover, there was a positive correlation between compulsions and total Scale for the Assessment of Positive Symptoms score and bizarre behaviors subscore. There was no difference between the 2 groups regarding neurocognitive functions. The level of quality of life of schizophrenic patients with OC symptoms was lower. Besides, no correlation was found between OC symptoms and neurocognition and quality of life. CONCLUSIONS The findings of this study indicate that schizophrenia patients with OC symptoms had severe psychotic symptoms with a distinctive clinical picture including good neurocognition but poor functioning.
International Journal of Psychiatry in Clinical Practice | 2014
Filiz Civil Arslan; Ahmet Tiryaki; Evrim Özkorumak
Abstract Objective. Cognitive dysfunction in bipolar disorder (BD) is well established in the literature. The neurocognitive deficits have been considered to be endophenotypic markers of BD, and studies have examined whether neurocognitive deficits exist in first-degree relatives of individuals with BD I. We hypothesized that performance in tests of neurocognitive function would be impaired in euthymic BD I patients and their unaffected first-degree relatives compared to that of healthy controls. Methods. We compared the performance of bipolar patients, their first-degree relatives, and healthy controls in a battery of neurocognitive tests to reveal possible endophenotypes of BD. A diagnostic interview and neuropsychological test battery were administered to 30 BD I patients, 55 of their unaffected first-degree relatives and 32 healthy controls. Results. The patients and their first-degree relatives were significantly impaired in executive function assessed using the Wisconsin Card Sorting Test (WCST) and Trail Making Test-B (TMT-B) relative to the controls (WCST; perseverative errors: p < 0.0005, categories completed: p = 0.002, TMT-B; p = 0.002). There were no significant differences between the groups in terms of attention, psychomotor speed, verbal memory, or learning. Conclusion. Our study suggests that the deficits in executive function may be endophenotypic markers of genetic vulnerability to BD I.
European Psychiatry | 2012
A. Karahan; Ahmet Tiryaki; B. Iskender; E. Ozkorumak
Objective The purpose of this study is to examine the factors which influence schizophrenia patients’ levels of insight and functional remission. Method In this study, 70 outpatients between the ages of 18–65 who applied to the Karadeniz Technical University Psychiatry Clinic and were diagnosed with schizophrenia according to DSM-IV were evaluated. Patients who have disease which affects the central nervous system, whose CGI disease severity score is above four, who were taken as inpatients to the hospital in the last two months were excluded from the study. The patients were evaluated by using socio-demographic data collection form, clinical interview structured for DSM (SCID-I), the Positive and Negative Syndrome Scale (PANSS), Calgary Depression Scale (CDS), the Functional Remission of General Schizophrenia Scale (FROGS), Schedule for Assessing the Three Components of Insight (SAI-E) and cognitive test battery. Results Patients SAI-E levels were found to be correlated with the PANSS, Stroop Test (ST), Controlled Word Association Test (FAS) and Trail Making Test (TMT) A-B scores. In the regression analysis, FAS scores were the predictor of SAI-E total scores .The FROGS functional levels of patients were found to be related with occupational status, gender, age of onset illness, comorbid psychiatric illness, PANSS, CDS, SAI-E, FAS, TMT, ST and Wisconsin Card Sorting Test scores. In the regression analysis, occupational status, comorbid obsessive compulsive disorder, PANNS negative and general psychopathology and FAS scores were the predictors of patients’ functional status. Discussion The effect of cognitive functioning and insight on the patients’ level of functionality is prominent.
General Hospital Psychiatry | 2015
Filiz Civil Arslan; Emel Korkmaz Uysal; Evrim Özkorumak; Ahmet Tiryaki
Trazodone is a heterocyclic antidepressant that exerts its effect via the inhibition of selective serotonin reuptake and the antagonism of 5-HT2A and 5-HT2C receptors. Antidepressant-induced galactorrhea and increases in prolactin levels have rarely been reported. Trazodone can potentiate the serotonergic activity of citalopram. To our knowledge, no cases of galactorrhea associated with use of trazodone have been reported to date. This report describes a unique case of the development of galactorrhea following the addition of trazodone (100 mg/day, 2 weeks) to the treatment of a patient who was receiving citalopram (40 mg/day, 6 weeks) therapy for a diagnosis of depressive disorder, which improved upon the discontinuation of trazodone.
Noro Psikiyatri Arsivi | 2017
Ahmet Tiryaki; Filiz Civil Arslan; Mihriban Yildirim
Klein-Levine syndrome (KLS) is a rare syndrome (1-2 reported cases per 1 million) that affects mostly men in young adulthood (1,2). The etiology of KLS is unknown however the reported flu-like symptoms prior to the initial KLS attack suggest that autoimmune mechanisms and genetic factors might have a role in the ethiopathogenesis (3). The KLS attacks are characterized by hypersomnia (15-21 hour/day), cognitive impairment (apathy, confusion, slowness, amnesia), derealization (dreamy state, altered perception) and more infrequently hypersexuality and depressive mood (3). Common mechanisms as circadian rhythm abnormalities and clinical similarities indicate a possible relationship between KLS and mood disorders (1). A rare case of co-occuring KLS and bipolar disorder (BD) is presented in this report. Written consent was obtained from the patient for this presentation.
Anatolian Journal of Psychiatry | 2017
Ahmet Tiryaki; Demet Sağlam Aykut; Evrim Özkorumak Karagüzel; Suleyman Karahan
Objective: Function of NO and its intra-system competitive inhibitor of the nitric oxide, asymmetric dimethylarginine (ADMA) has been investigated in mood disorders, schizophrenia, autism, obsessive compulsive disorder and Alzheimer Disorder and significant results were obtained. The mechanism of action in mood stabilizators is still unclear despite many years of studies. The parameters of oxidative stres were shown to decreased upon antimanic treatment in bipolar affective disorder (BAD). The lithium may be suggested to produce neuroprotective effects against oxidative damage by regulatory effects towards various targets. The effects of lithium on nitric oxide synthase were researched in laboratory studies. In this study, two tubes of plasma were taken from the patients for determination of NO and ADMA during manic and euthymic phases. Methods: Seventeen patients who presented to the psychiatry or emergency departments of Farabi Hospital of Karadeniz Technical University and were diagnosed with BAD-I manic episode and followed with lithum were included into the study. The Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I), Hamilton Depression Rating Scale (HAM-D), Young Mania Rating Scale (YMRS), Montgomery-Asberg Depression Rating Scale (MADRS), were applied. For determination of NO and ADMA levels, two tubes of plasma were collected during the periods of mania and euthymia in the patient group. Results: The level of ADMA were significantly lower while the level of NO were higher in the posttreatment group than the pretreatment group. Conclusion: In this study, the level of NO were increased, the level of ADMA were dicreased in response to lithium treatment, and the therapeutic effect of lithium may contribute this mechanism.
Turkish journal of psychiatry | 2016
Demet Sağlam Aykut; Filiz Civil Arslan; Ahmet Tiryaki; Evrim Özkorumak; Serdar Karakullukçu
OBJECTIVE Maintenance treatment with antipsychotic drugs for patients with schizophrenia is highly effective in decreasing the recurrence rate of the disease. In the current study, we aimed to compare long-acting second generation antipsychotic drug injections and oral forms of second generation antipsychotic drugs in terms of their adverse effects on quality of life. METHOD Forty-one patients receiving second generation antipsychotic drugs and 139 patients diagnosed with schizophrenia or schizoaffective disorder were treated with oral second generation antipsychotic drugs and enrolled in the study. All patients were evaluated with Positive and Negative Symptoms Scale (PANNS), extrapyramidal symptom rating scale (ESRS) and UKU, and Quality of Life Enjoyment and Satisfaction questionnaire (Q-LES-Q). RESULTS The impact of adverse effects of oral second generation antipsychotic drugs on the daily performance of patients with schizophrenia or schizoaffective disorder was found to be significantly higher than that of the long acting injection antipsychotic drugs. The quality of life of patients receiving long acting second generation antipsychotic drug injection was significantly higher when compared with that of the patients treated with oral second generation antipsychotic drugs. CONCLUSION The results of this study showed that the long-acting second generation antipsychotic injection treatment was superior to second generation oral forms of antipsychotic drugs in terms of adverse effects and measures of quality of life. Further studies with specific design and the supplementation of larger samples are needed.
Turkish journal of psychiatry | 2016
Filiz Civil Arslan; Ahmet Tiryaki; Evrim Özkorumak Karagüzel; Gizem Aral; Oguz Sarioglu; İmran İnce; Sertaç Çankaya; Ahmet Alver
OBJECTIVE Impairment in immune functions is proposed as a key factor in the cognitive decline in bipolar disorder (BD) however there is scarcity of research on the impact of inflammation on cognitive functions. Our aim is to compare IL-18 and IL-6 levels in BD patients and controls and to study the relationship between IL-18 and IL-6 levels and cognitive impairment METHOD: Thirty-six euthymic BD-I patients and 38 age, sex and educational level matched healthy controls were enrolled in the study. All participants were evaluated with neurocognitive tests. The plasma IL-6 and IL-18 levels of both groups were measured with ELISA kits. RESULTS There was no statistically significant difference between IL-6 and IL-18 levels of patient and healthy control groups. In the patient group, IL-18 level was positively correlated with completed categories score wheras there was a negative correlation with perseverative response and perseverative errors. Moreover IL-18 level was positively correlated with immediate recall, delayed recall and learning scores while there was a negative correlation with stroop interference scores. No correlation was found between IL-6 level and neuropsychological test scores in the patient group. CONCLUSION This is the first study that investigates the relation of IL-18 with cognitive functions. Possible detrimental or protective effects of IL-18 in BD is not yet clear, however the positive association of IL-18 level and neuropsychological test scores might indicate a neuroprotective role of IL-18 in the euthymic period of BD which is the closest state to physiological condition.
Turkish journal of psychiatry | 2016
Demet Sağlam Aykut; Filiz Civil Arslan; Evrim Özkorumak Karagüzel; Serdar Karakullukçu; Ahmet Tiryaki
OBJECTIVE High suicide risk was shown to be related with depression and low quality of life in studies investigating clinical variables related to suicidal behavior. The aim of this study was to investigate the effects of a suicide attempt on clinical presentation by comparing sociodemographic variables, clinical signs, symptoms of depression, quality of life, social functionality, and reported adverse drug reactions in schizophrenic patients with and without suicide. METHOD Positive and Negative Syndrome Scale (PANSS), Calgary Depression Scale (CDS), Quality of Life Enjoyment and Satisfaction Questionnaire (Q-LES-Q), Social Functioning Scale (SFS), and Udvalg for Kliniske Undersøgelser Side Effect Rating Scale (UKU) were administered to 115 patients with schizophrenia. RESULTS 44.3% of patients had at least one suicide attempt. Among sociodemographic variables, a family history of suicide, smoking, and total duration of disease were significantly higher in patients with suicide history than without. Scores of CDS and UKU subscores were significantly higher, and quality of life and social occupation in social functionality were significantly lower in patients with a history of suicide. In correlation analysis, CSD was negatively correlated with Q-LES-Q and independency/performance subscore of SFI, and positively correlated with UKU-Neurological subscore. DISCUSSION In line with this data, suicidal behavior may be suggested to affect clinical presentation and course characteristic of schizophrenic patients. Additional treatments towards factors that may impact on the clinical course and social support programs might be suggested for these patients.
Iranian Red Crescent Medical Journal | 2016
Nazım Ercüment Beyhun; Gamze Çan; Ahmet Tiryaki; Serdar Karakullukçu; Bekir Bulut; Sehbal Yesilbas; Halil Kavgaci; Murat Topbas
Background Needs based biopsychosocial distress instrument for cancer patients (CANDI) is a scale based on needs arising due to the effects of cancer. Objectives The aim of this research was to determine the reliability and validity of the CANDI scale in the Turkish language. Patients and Methods The study was performed with the participation of 172 cancer patients aged 18 and over. Factor analysis (principal components analysis) was used to assess construct validity. Criterion validities were tested by computing Spearman correlation between CANDI and hospital anxiety depression scale (HADS), and brief symptom inventory (BSI) (convergent validity) and quality of life scales (FACT-G) (divergent validity). Test-retest reliabilities and internal consistencies were measured with intraclass correlation (ICC) and Cronbach-α. Results A three-factor solution (emotional, physical and social) was found with factor analysis. Internal reliability (α = 0.94) and test-retest reliability (ICC = 0.87) were significantly high. Correlations between CANDI and HADS (rs = 0.67), and BSI (rs = 0.69) and FACT-G (rs = -0.76) were moderate and significant in the expected direction. Conclusions CANDI is a valid and reliable scale in cancer patients with a three-factor structure (emotional, physical and social) in the Turkish language.