26 research outputs found

    A comparative stratigraphy of cilicia : Results of the first three cilician chronology workshops

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    This article presents a preliminary comparative stratigraphy of excavated sites in Plain Cilicia and one in Rough Cilicia. It is the outcome of three workshops held in 2014, 2015 and 2017. Plain Cilicia at the junction of Anatolia, Syro-Mesopotamia and Cyprus is one of the most fertile regions of the Ancient Near East. In recent years, archaeological research in the region has intensified, re-opening questions of chronology. The comparative stratigraphy discussed in the workshops is presented here in form of a gazetteer of the participating sites and a chart. This is to be understood as a first step towards a more comprehensive chronology

    Measurements of Higgs boson production cross sections and couplings in the diphoton decay channel at root s=13 TeV

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    Measurements of Higgs boson production cross sections and couplings in events where the Higgs boson decays into a pair of photons are reported. Events are selected from a sample of proton-proton collisions at root s = 13TeV collected by the CMS detector at the LHC from 2016 to 2018, corresponding to an integrated luminosity of 137 fb(-1). Analysis categories enriched in Higgs boson events produced via gluon fusion, vector boson fusion, vector boson associated production, and production associated with top quarks are constructed. The total Higgs boson signal strength, relative to the standard model (SM) prediction, is measured to be 1.12 +/- 0.09. Other properties of the Higgs boson are measured, including SM signal strength modifiers, production cross sections, and its couplings to other particles. These include the most precise measurements of gluon fusion and vector boson fusion Higgs boson production in several different kinematic regions, the first measurement of Higgs boson production in association with a top quark pair in five regions of the Higgs boson transverse momentum, and an upper limit on the rate of Higgs boson production in association with a single top quark. All results are found to be in agreement with the SM expectations.Peer reviewe

    Measurement of the top quark mass using events with a single reconstructed top quark in pp collisions at root s=13 TeV

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    Abstract:A measurement of the top quark mass is performed using a data sample en-riched with single top quark events produced in thetchannel. The study is based on proton-proton collision data, corresponding to an integrated luminosity of 35.9 fb−1, recorded at√s= 13TeV by the CMS experiment at the LHC in 2016. Candidate events are selectedby requiring an isolated high-momentum lepton (muon or electron) and exactly two jets,of which one is identified as originating from a bottom quark. Multivariate discriminantsare designed to separate the signal from the background. Optimized thresholds are placedon the discriminant outputs to obtain an event sample with high signal purity. The topquark mass is found to be172.13+0.76−0.77GeV, where the uncertainty includes both the sta-tistical and systematic components, reaching sub-GeV precision for the first time in thisevent topology. The masses of the top quark and antiquark are also determined separatelyusing the lepton charge in the final state, from which the mass ratio and difference aredetermined to be0.9952+0.0079−0.0104and0.83+1.79−1.35GeV, respectively. The results are consistentwithCPTinvariance

    Transcatheter closure of post-myocardial infarction muscular ventricular septal rupture: Case report [Miyokard infarktüsü sonrasi geli?en musküler ventriküler septal rüptürün transkateter yöntemle kapatilmasi]

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    Muscular ventricular septal rupture (VSR) is a serious and life threatening complica tion of acute myocardial infarction. It is usually occurs within the first one week after infarction. Today, the recommended treatment is surgical closure. Another treatment option is transcatheter closure method. In this report, we present a patient who is applied transcatheter closure due to post myocardial infarction muscular VSR associated with refractory heart failure. Copyright © 2013 by Türkiye Klinik leri

    Low pulse pressure as a predictor of death in patients with mild to advanced heart failure

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    PubMedID: 20548803The prognostic value of pulse pressure has been investigated in heart-failure patients. Low pulse pressure in advanced heart failure and high pulse pressure in mild heart failure have been separately linked to increased mortality rates. We prospectively investigated an association between pulse pressure and 2-year cardiovascular death in an entire heart-failure population. We prospectively enrolled 225 heart-failure patients (New York Heart Association [NYHA] functional class, I-IV; mean age, 56.5 ± 12.3 yr; 188 men). The patients' blood pressures were measured in accordance with recommended guidelines. Pulse pressures were calculated as the difference between systolic and diastolic blood pressure values. The patients were monitored for a mean period of 670 ± 42 days for the occurrence of cardiovascular death. All patients were divided into quartiles according to their pulse pressures (55 mmHg). Pulse pressure decreased as NYHA class worsened (P <0.001). Patients in the <35-mmHg quartile had the lowest plasma sodium concentrations, left ventricular ejection fractions, and systolic myocardial velocities upon echocardiography; and the highest left ventricular dimensions, early diastolic/late diastolic filling velocity ratios, and peak early/peak late diastolic myocardial velocity ratios. Pulse pressure independently predicted death in the patients with advanced heart failure and in the entire population. Upon receiver operating characteristic analysis, a 30-mmHg cutoff value for pulse pressure predicted death with 83.7% sensitivity and 79.7% specificity. Pulse pressure is easily calculated and enables the prediction of cardiovascular death in patients with mild to advanced heart failure. Pulse pressure can be used reliably as a prognostic marker in clinical practice. © 2010 by the Texas Heart® Institute, Houston

    A new criterion to differentiate atrioventricular nodal reentrant tachycardia from atrioventricular reciprocating tachycardia: Combined AVR criterion

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    PubMedID: 30497728Aim: A combined aVR criterion is described as the presence of a pseudo r' wave in aVR during tachycardia in patients without r' wave in aVR in sinus rhythm and/or a ?50% increase in r' wave amplitude compared to sinus rhythm in patients with r' wave in the basal aVR lead. We aimed to investigate the use of combined aVR criterion in differential diagnosis of atrioventricular nodal reentrant tachycardia (AVNRT) and atrioventricular reciprocating tachycardia (AVRT). Methods: In this prospective study, 480 patients with inducible narrow QRS supraventricular tachycardia (SVT) were included. Twelve-lead electrocardiogram (ECG) was conducted during tachycardia and sinus rhythm. The patients were divided into two groups according to the arrhythmia mechanism that determined via EPS, AVNRT, and AVRT. Criteria of narrow QRS complex tachycardia were compared between the two groups. Results: AVNRT was present in 370 (77%) patients and AVRT in 110 (23%) patients. Combined aVR criterion was found to be more frequent in patients with AVNRT (84.1% and 9.1%, p < 0.001). In logistic regression analysis, combined aVR criterion and classical ECG criterion were found to be the most important predictors of AVNRT (p < 0.001). The sensitivity, specificity, positive predictive value, and negative predictive value of the combined aVR criterion for AVNRT were 84.1%, 90.9%, 96.9%, and 62.9%, respectively. Conclusion: In the differential diagnosis of patients with SVT, the combined aVR criterion identifies the presence of AVNRT with an independent and acceptable diagnostic value. In addition to classical ECG criteria for AVNRT, it is necessary to evaluate the combined aVR criterion in daily practice. © 2018 Elsevier Inc

    Evaluation of arterial stiffness for predicting future cardiovascular events in patients with ST segment elevation and non-ST segment elevation myocardial infarction

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    PubMedID: 24294138Background. Arterial stiffness parameters in patients who experienced MACE after acute MI have not been studied sufficiently. We investigated arterial stiffness parameters in patients with ST segment elevation (STEMI) and non-ST segment elevation myocardial infarction (NSTEMI). Methods. Ninety-four patients with acute MI (45 STEMI and 49 NSTEMI) were included in the study. Arterial stiffness was assessed noninvasively by using TensioMed Arteriograph. Results. Arterial stiffness parameters were found to be higher in NSTEMI group but did not achieve statistical significance apart from pulse pressure (P = 0.007). There was no significant difference at MACE rates between two groups. Pulse pressure and heart rate were also significantly higher in MACE observed group. Aortic pulse wave velocity (PWV), aortic augmentation index (AI), systolic area index (SAI), heart rate, and pulse pressure were higher; ejection fraction, the return time (RT), diastolic reflex area (DRA), and diastolic area index (DAI) were significantly lower in patients with major cardiovascular events. However, PWV, heart rate, and ejection fraction were independent indicators at development of MACE. Conclusions. Parameters of arterial stiffness and MACE rates were similar in patients with STEMI and NSTEMI in one year followup. The independent prognostic indicator aortic PWV may be an easy and reliable method for determining the risk of future events in patients hospitalized with acute MI. © 2013 Oguz Akkus et al

    Conduction characteristics in atrial fibrillation. Predictive value of tissue Doppler echocardiography

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    PubMedID: 23588606Background. Atrial fibrillation (AF) is one of the most common arrhythmias observed in clinical practice. The frequency of AF is increased in patients with impaired interatrial conduction. We aimed to investigate whether tissue Doppler echocardiography could be used for the evaluation of atrial conduction characteristics instead of an electrophysiological study, and to examine the predictive accuracy of tissue Doppler echocardiography for the inducibility of sustained AF. Methods. We enrolled 86 consecutive patients who underwent an electrophysiological study. We performed electrocardiographic P wave dispersion, M-mode, two-dimensional, Doppler, and tissue Doppler echocardiography as well as an electrophysiological study (EPS) to evaluate the intra- and interatrial conduction times. We tried to induce AF, and the patients were categorized according to the inducibility of sustained (>120 s) AF. Results. We found a good correlation between intra-left atrial conduction time detected by tissue Doppler echocardiography (ILCT-echo) and by EPS (ILCT-eps; r=0.744, p<0.001), and a weak correlation between interatrial conduction times (IACT-echo and IACT-eps, r=0.396, p<0.001). In patients with inducible sustained AF, P wave dispersion (46±19 ms vs. 27±18, p<0.001), ILCT-echo (29±10 ms vs. 17±7 ms, p<0.001), and IACT-eps (47±11 ms vs. 36±13 ms, p<0.001) were found to be higher than those of the noninducible/nonsustained AF group. These three parameters were independent predictors of the inducibility of sustained AF. Conclusion. We demonstrated that ILCT-echo could be used instead of ILCT-eps for the evaluation of left atrial conduction characteristics. We also showed that ILCT-eps could be a valuable parameter for predicting the development of long-lasting AF. © 2013 Urban & Vogel

    Is cystatin C an evaluative marker for right heart functions in systemic sclerosis?

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    PubMedID: 27414726Background/objectives Systemic sclerosis (SSc) is a progressive autoimmune disorder with multi-organ involvement. Patients who have SSc are at risk of developing pulmonary arterial hypertension (PAH) and right heart failure. Impaired right heart hemodynamic function is the most powerful predictor of mortality in these patients. We assessed the interactions between levels of NT-proBNP, cystatin C, and right ventricular functions in SSc patients without significant PAH. Methods Fifty SSc patients without significant PAH (37 women and 13 men, mean age 47.2 ± 10.3), and 44 healthy participants as a control group (29 women and 15 men, mean age 47.9 ± 10.4) were included in the study. Results Cystatin C and NT-proBNP levels were significantly higher in patients with SSc. Both cystatin C and NT-proBNP levels possitively correlate with age, interventricular septum thickness, left ventricular posterior wall thickness, systolic pulmonary artery pressure, the peak late diastolic filling velocity, tricuspid regurgitation velocity, and negatively correlate with pulmonary artery acceleration time in the patients. Conclusions Our results showed that elevated cystatin-C and NT-proBNP levels may be a clue for diastolic impairment in right ventricular functions in SSc. © 2016 Elsevier Ireland LtdOur study was funded by the scientific research project support unit of Cukurova University

    Stevens-Johnson syndrome associated with methotrexate treatment for acute lymphoblastic leukemia: A case report [Síndrome de Stevens-Johnson asociado al tratamiento con metotrexato de la leucemia linfoblástica aguda: A propósito de un caso]

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    PubMed ID: 29756724Toxic epidermal necrolysis and Stevens-Johnson syndrome are rare mucocutaneous diseases which are associated with a prolonged course and potentially lethal outcome. They are mostly drug induced and mortality rates are very high. Althoughmostlyskinisinvolved,multipleorgansystemssuch as cardiovascular, pulmonary, gastrointestinal, and urinary systems may be affected. Here, we report a case of Stevens-Johnson Syndrome associated with methotrexate treatment who developed acute cardiac failure and gastrointestinal hemorrhage beside skin findings. He had been treated with intravenous immunglobulin and methylprednisolone succesfully and continued chemotherapy with methotrexate treatment again. © 2018 Sociedad Argentina de Pediatria. All rights reserved
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