Publications by authors named "Oguzhan E Turan"

Coronary artery bypass graft (CABG) surgery is one of the main treatment procedures for revascularization. Diagnosing postoperative complications can be difficult. One rare complication is the iatrogenic connection of the graft to the venous system, causing distal ischemia due to an arteriovenous shunt.

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The coexistence of different types of wide QRS complex tachycardias induced by the same trigger has rarely been observed. The electrical instability and incessant nature of tachycardias can cause tachycardiomyopathy and will not allow accurate diagnosis during an electrophysiological study (EPS). In case of an electrical storm, elimination of the trigger may be the first approach to provide patient stability.

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Background: Radiofrequency catheter ablation (RFCA) is a well-established treatment for atrial fibrillation (AF). Fluoroscopy, a widely used imaging method for RFCA, has significant implications for human health. Although no fluoroscopy or near-zero fluoroscopy strategies have gained popularity, they have limitations, such as long procedure times, additional equipment, and expertise.

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Cancer therapy-related cardiac dysfunction (CTRCD) is still a serious problem. Existing risk scores are insufficient for risk classification, especially in low and medium-risk patients. This study aims to evaluate if arterial stiffness (AS) measurement, which is associated with most of the known risk factors, can be a useful parameter for predicting subsequent CTRCD in patients with breast cancer (BC).

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Introduction: Accessory pathway (AP) ablation is a straightforward approach with high success rates, but the fluoroscopy time (FT) is significantly longer in conventional technique. Electroanatomical mapping systems (EMS), reduce the FT, but anatomical and activation mapping may prolong the procedure time (PT). The fluoroscopy integration module (FIM) uses prerecorded fluoroscopy images and allows ablation similar to conventional technique without creating an anatomical map.

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Background The morbidity and mortality rates related to hypertension (HT) are still high despite the developments in this area. Nondipper hypertension (NDHT) is related to worse clinical outcomes. But the dipping pattern of HT is not still used for treatment targets.

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Article Synopsis
  • Infections of cardiovascular implantable electronic devices (CIED) are primarily caused by Gram-positive bacteria, but this study focuses on the less common Gram-negative bacteria (GNB) infections, aiming to understand their risk factors, clinical features, and outcomes.
  • The study analyzed data from 236 patients across 17 European centers, comparing 59 patients with GNB-CIED infections to controls with Gram-positive infections and those without infections, finding no major differences in clinical presentation but notable trends in diagnostic imaging.
  • Key risk factors for GNB infections included obesity, a high comorbidity index, specific pacemaker settings, and the right subclavian vein site for device implantation; these infections were also linked to higher mortality rates, suggesting
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ST-elevation myocardial infarction (STEMI) is a life-threatening clinical condition that requires immediate intervention, mostly caused by complete occlusion of epicardial vessels. Other diseases such as myocarditis, pericarditis, electrolyte disturbance, and early repolarization may mimic. We present a rare case of atrial lead-related atrial perforation which mimics inferior STEMI.

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Object: The effect of frontal QRS-T angle, Tp-e and Tp-e/QT ratio on cardiac events have been shown in many studies. In this study, we aimed to determine the prognostic value of frontal QRS-T angle, TPe and Tp-e/QT ratio on ICD shock in patients who had ICD (Implantable Cardioverter Defibrillator) implanted due to heart failure with reduced ejection fraction (HFrEF).

Material And Method: 158 patients with HFrEF who had previous ICD implantation were retrospectively analyzed.

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Background: Wolff-Parkinson-White (WPW) syndrome is one of the most common congenital cardiac abnormalities among ventricular pre-excitation syndromes. Radiofrequency catheter ablation (RFCA) treatment of accessory pathways (APs) in WPW patients is an established curative therapy restoring normal atrioventricular conduction. We have not encountered any studies evaluating both the LA and LV functions of these patients before and after RFCA with three dimensional-speckle tracking echocardiography (3D-speckle tracking echocardiography (STE)).

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Objective: Atrial fibrillation is the most common arrhythmia observed in the clinical practice. Pulmonary vein isolation is a well established treatment option for atrial fibrillation but is limited by recurrence. Previous studies have demonstrated that abnormal P wave indices were associated with adverse atrial remodeling and its role in predicting atrial fibrillation recurrence.

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Atrial fibrillation (AF) is the most common arrhythmia, and amiodarone is one of the most commonly used drugs for medical cardioversion of AF, which should be used carefully due to its toxic effects. Amiodarone-induced thyrotoxicosis (AIT) may develop in amiodarone-treated patients. In contrast, the most common rhythm disturbance accompanying a thyroid storm is AF.

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Pulmonary vein (PV) automaticity is an established trigger for paroxysmal atrial fibrillation (PAF), making PV isolation (PVI) the cornerstone of catheter ablation. However, data on triggers for atrial fibrillation (AF) and catheter ablation strategy in very young patients aged <30 years are sparse. A total of 51 young patients (mean age 24.

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Upper venous system anatomic variations may cause difficulties during cardiac pacemaker implantation. Persistent left superior vena cava (PLSVC) and absent right superior vena cava could be an arrhythmogenic source of atrial arrhythmias and cardiac conduction disease. We represent dual-chamber pacemaker implantation in a patient with a very rare upper venous system anomaly, paroxysmal atrial fibrillation, sick sinus syndrome, that cause unusual fluoroscopic image.

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Article Synopsis
  • The study examines the relationship between epicardial adipose tissue (EAT) thickness and hypertensive retinopathy, highlighting the role of EAT in endothelial dysfunction and inflammation.
  • Out of 73 newly diagnosed hypertensive patients, 37% showed signs of retinopathy, and those with retinopathy had greater EAT thickness and higher LDL cholesterol levels compared to those without.
  • The findings suggest that both EAT thickness and LDL cholesterol are independent predictors of retinopathy in hypertensive patients, indicating a potential marker for monitoring eye health in these individuals.
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Aim    High sensitive troponin (hs-TnI) levels may increase secondary to Coronavirus disease-2019 (COVID-19), and this increase is associated with cardiovascular mortality in COVID-19 patients. Epicardial adipose tissue (EAT) is associated with myocardial injury directly as a reservoir tissue for coronavirus, and indirectly through mediators it secretes as an apocrine gland. We aimed to evaluate the relationship between myocardial injury secondary to COVID-19 infection and EAT thickness.

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Article Synopsis
  • - The study aimed to evaluate the effectiveness of extended-release metoprolol succinate (MetS) and carvedilol in treating idiopathic frequent monomorphic premature ventricular contractions (PVCs) among 114 patients, with monitoring done through 24-hour Holter monitoring.
  • - Results showed that the "good" response rate for MetS and carvedilol was relatively low at 11.3% and 16.3%, respectively, but a significant number of patients (95.5% for MetS and 86.4% for carvedilol) had "poor" or "proarrhythmic" responses, particularly those with a high baseline PVC burden.
  • - Side effects occurred in 5
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Highly sensitive troponin (hs-TnI) levels are frequently elevated in COVID-19 patients and are associated with increased cardiovascular mortality during hospitalization. However, no data exists on cardiac involvement in patients recovered from COVID-19 infection. We aimed to evaluate by global longitudinal strain (LV-GLS) whether there is subclinical myocardial deformation after COVID-19 infection.

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Aims: Mahaim-type accessory pathways (MAPs) are generally right-sided due to the embryological differentiation, but left-sided localization is also possible. This study aims to compare the clinical and electrophysiological characteristics of right- and left-sided MAPs.

Methods: Of 251 patients diagnosed with AP by electrophysiological study between November 2015 and February 2020, 12 patients with MAP were included (right sided n = 8, left sided n = 4).

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Aim: The relationship between arrhythmia induction and ablation with palpitation characteristics has been demonstrated in electrophysiological study (EPS) patients. However, there is insufficient data on palpitation characteristics and their sensitivity and specificity. We aimed to identify the relationship between scoring composed of palpitation characteristics with the supraventricular tachycardia (SVT) induction and the success rate of the procedure.

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Aims: Migraine is a chronic neurovascular disorder characterized by intermittent episodes of severe headache. Abnormalities in the autonomic nervous system (sympathetic and parasympathetic nervous systems) have been detected during migraine-free periods in patients with migraine. In these patients, disrupted autonomic innervations of the heart and coronary arteries may lead to electrocardiographic changes during a migraine attack.

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Background: Atrial arrhythmias, particularly atrioventricular nodal reentrant tachycardia, can coexist with drug-induced type 1 Brugada electrocardiogram (ECG) pattern (DI-Type1-BrP). The present study was designed to determine the prevalence of DI-Type1-BrP in patients with atrioventricular accessory pathways (AV-APs) and to investigate the clinical, electrocardiographic, electrophysiologic, and genetic characteristics of these patients.

Methods: One-hundred twenty-four consecutive cases of AV-APs and 84 controls underwent an ajmaline challenge test to unmask DI-Type1-BrP.

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Background: Familial Mediterranean fever (FMF) is a chronic, recurrent auto-inflammatory disease characterised by self-terminating attacks of fever and sterile polyserositis. The main cause of death in auto-inflammatory diseases is cardiovascular events. Additionally, auto-inflammatory diseases have potential effects on the myocardial repolarisation parameters, including the T-wave peak-to-end (Tp-Te) interval, cTp-Te interval (corrected Tp-Te) and the cTp-Te/QT ratio.

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