Muammer Karakayalı

Muammer Karakayalı

orcid

Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

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

Representative Publications

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28 July 2023 in Coronary Artery Disease
Verified
Journal Article
Closed access
MKMuammer Karakayalı
Muammer Karakayalı
TOTimor Omar
Timor Omar
IAInanç Artac
Inanç Artac
DIDogan Ilis
Dogan Ilis
AAAyca Arslan
Ayca Arslan
IRIbrahim Rencuzogullari
Ibrahim Rencuzogullari
Introduction and objective: Despite major advances in reperfusion therapies, morbidity and mortality rates associated with cardiovascular disorders remain high, particularly in patients with ST-segment elevation myocardial infarction (STEMI). Therefore, identifying prognostic variables that can be used to predict morbidity and mortality in STEMI patients is critical for better disease management. The HALP (hemoglobin, albumin, lymphocyte, and platelet) score, a novel index indicating nutritional status and systemic inflammation, provides information about prognosis. In this context, this study was carried out to investigate the relationship between HALP score assessed at admission and in-hospital mortality in STEMI patients. Material and methods: The population of this retrospective study consisted of 1307 consecutive patients diagnosed with STEMI and who underwent primary percutaneous coronary intervention (pPCI). The 1090 patients included in the study sample were divided into two groups based on the median HALP score value of 3.59. In-hospital and all-cause mortality rates during the follow-up were obtained from the registry. Results: In-hospital mortality rate was significantly higher in patients with a HALP score of less than 3.59 compared to those with a HALP score of more than 3.59 (7.5% and 0.7%, respectively; P < 0.001). Univariate and multivariate Cox proportional hazard analyses revealed that the HALP score is independently associated with in-hospital mortality. The optimal HALP score cutoff value of <3.72 predicted in-hospital mortality with 95.56% sensitivity and 49.19% specificity. Conclusion: This study’s findings indicate that HALP score may be a significant independent predictor of in-hospital mortality in patients with STEMI treated with pPCI.

21 March 2024 in Arquivos Brasileiros de Cardiologia
Verified
Journal Article
Open access
PDF file
MKMuammer Karakayalı
Muammer Karakayalı
MAMehmet Altunova
Mehmet Altunova
TYTurab Yakisan
Turab Yakisan
SASerkan Aslan
Serkan Aslan
TOTimor Omar
Timor Omar
IRIbrahim Rencüzoğulları
Ibrahim Rencüzoğulları
Resumo Fundamento: A isquemia com artéria coronária não obstrutiva (INOCA) é uma doença cardíaca isquêmica que inclui principalmente disfunção microvascular coronariana e/ou vasoespasmo coronariano epicárdico devido à disfunção vascular coronariana subjacente e pode ser observada mais comumente em pacientes do sexo feminino. O índice de inflamação imunológica sistêmica (SII, relação plaquetas × neutrófilos/linfócitos) é um novo marcador que prediz resultados clínicos adversos na doença arterial coronariana (DAC). Objetivo: Este estudo tem como objetivo investigar a relação entre INOCA e SII, [...] Resumo Fundamento: A isquemia com artéria coronária não obstrutiva (INOCA) é uma doença cardíaca isquêmica que inclui principalmente disfunção microvascular coronariana e/ou vasoespasmo coronariano epicárdico devido à disfunção vascular coronariana subjacente e pode ser observada mais comumente em pacientes do sexo feminino. O índice de inflamação imunológica sistêmica (SII, relação plaquetas × neutrófilos/linfócitos) é um novo marcador que prediz resultados clínicos adversos na doença arterial coronariana (DAC). Objetivo: Este estudo tem como objetivo investigar a relação entre INOCA e SII,

18 July 2023 in The Journal of Clinical Hypertension
Verified
Journal Article
Open access
MKMuammer Karakayalı
Muammer Karakayalı
TOTimor Omar
Timor Omar
IAInanç Artac
Inanç Artac
IRİbrahim Rencuzogullari
İbrahim Rencuzogullari
YKYavuz Karabag
Yavuz Karabag
ODOzturk Demir
Ozturk Demir
Although hypertension is considered high intravascular pressure, impairing circadian blood pressure (BP) has been shown to potentially contribute to poor clinical outcomes. Systemic immune‐inflammation index (SII), based on platelet, neutrophil, and lymphocyte counts, has been established as a strong prognostic marker in cardiovascular disease. The role of inflammation in the pathogenesis of hypertension is a well‐known issue and inflammatory markers are associated with BP variability. We aimed to investigate whether there is a relationship between circadian BP changes and SII in newly diagnosed hypertensive patients. The study population consisted of 196 newly diagnosed hypertensive patients without LVH. In total, 76 (38%) patients had a dipper BP pattern, 60 (31%) patients had a non‐dipper BP pattern, and 60 (31%) patients had a reverse‐dipper BP pattern. SII was calculated according to Multivariate logistic regression analysis revealed SII and HDL‐C as an independent predictors of reverse‐dipper circadian pattern in newly diagnosed hypertensive patients. The cut‐off value of the SII for reverse‐dipper hypertension in a ROC curve analysis was >639.73 with 63.3% sensitivity and 84.2% specificity. Our study showed that the SII level was higher in the reverse‐dipper hypertension patient group than in the dipper and non‐dipper hypertension groups. Furthermore, SII was an independent predictor of newly diagnosed reverse‐dipper hypertensive patients. The high SII value in newly diagnosed hypertensive patients can be used as an early warning parameter to identify reverse‐dipper hypertension patients.

3 December 2024 in Coronary Artery Disease
Verified
Journal Article
Closed access
MKMuammer Karakayalı
Muammer Karakayalı
MOMetin Ogun
Metin Ogun
IAInanç Artac
Inanç Artac
DIDoğan Ilis
Doğan Ilis
AAAyca Arslan
Ayca Arslan
YKYavuz Karabag
Yavuz Karabag
Introduction and objective: Malondialdehyde (MDA) is a predictive marker of cardiovascular events in patients with stable angina pectoris. However, there is limited information available regarding this marker in patients with acute coronary syndrome (ACS). The aim of the study was to explore the association of MDA levels with inhospital mortality among patients with ACS. Materials and Methods: The study sample consisted of 556 ACS patients. The leftover plasma samples collected in EDTA vials for troponin T estimation within 24 h of chest pain were used for analysis. Blood samples were collected into tubes for MDA, nitric oxide (NO), inducible nitric oxide synthase (i-NOS), endothelial nitric oxide synthase (e-NOS), total sialic acid (TSA), NT-proBNP, ANP, homocysteine, and cardiac troponin I (cTnI). The blood samples were centrifuged (4000g, 4 °C) for 10 min, and the obtained serum then kept at −25 °C until the analyses were carried out. The relationship between these markers and inhospital mortality of ACS patients was investigated. Results: Univariate logistic regression analysis revealed significant correlations among sex, age, creatine, MDA, NT-proBNP, ANP, homocysteine, cTnI, NO, e-NOS, i-NOS, and TSA. Further analysis of these variables using the multivariate logistic regression analysis indicated that age, creatine, MDA, and NT-proBNP were independent predictors. Optimal MDA cutoff value of >33.1 predicted inhospital mortality with 85% sensitivity and 88.17% specificity [AUC: 0.905 (95% CI: 0.878–0.928, P < 0.001)]. Conclusion: We demonstrated that MDA levels were elevated in cases of inhospital mortality among ACS patients and the optimal MDA cutoff value of >33.1 predicted inhospital mortality with 85% sensitivity and 88.17% specificity.

1 June 2022 in Revista da Associação Médica Brasileira
Verified
Journal Article
Open access
IYIbrahim Yildiz
Ibrahim Yildiz
IRIbrahim Rencüzoğulları
Ibrahim Rencüzoğulları
YKYavuz Karabağ
Yavuz Karabağ
MKMuammer Karakayalı
Muammer Karakayalı
IAinanc artac
inanc artac
MGMehmet Sait Gurevin
Mehmet Sait Gurevin
A decrease in the left ventricular ejection fraction (≤40%) in the setting of ST-segment elevation myocardial infarction is a significant predictor of mortality in the young ST-segment elevation myocardial infarction population. In this study, we aimed to investigate the predictors of left ventricular ejection fraction reduction and evaluate the long-term mortality rates in young ST-segment elevation myocardial infarction patients with or without decreased left ventricular ejection fraction. We enrolled retrospectively 411 consecutive ST-segment elevation myocardial infarction patients aged 45 years or below who underwent primary percutaneous coronary intervention. Young ST-segment elevation myocardial infarction patients were divided into two groups according to their left ventricular ejection fraction (≤40%, n=72 and >40%, n=339), which were compared with each other. Statin use, white blood cell count, C-reactive protein, peak creatine kinase-MB, prolonged ischemia time, left anterior descending artery-related infarction, proximally/ostial located lesion, and no-reflow were independently associated with low left ventricular ejection fraction. Additionally, long-term mortality was considerably higher in the left ventricular ejection fraction ≤40% group than those in the left ventricular ejection fraction>40% group (18.1% versus 2.4%; p<0.001). In young ST-segment elevation myocardial infarction patients, lesion properties (left anterior descending lesion, proximally located lesion), no-reflow, and prolonged ischemia time appeared to be important determinants for the left ventricular ejection fraction decline, rather than coronary disease severity or demographic and hematological parameters. Statin use may be preventive in the development of left ventricular ejection fraction decline in young ST-segment elevation myocardial infarction patients.

6 May 2023 in Journal of Electrocardiology
Verified
Journal Article
Closed access
MKMuammer Karakayalı
Muammer Karakayalı
IAInanç Artac
Inanç Artac
TOTimor Omar
Timor Omar
IRIbrahim Rencuzogullari
Ibrahim Rencuzogullari
YKYavuz Karabag
Yavuz Karabag
SHSerif Hamideyin
Serif Hamideyin