Publications by authors named "Ozgueven A Aykan"

Implantable active dense CMOS neural probes unlock the possibility of spatiotemporally resolving the activity of hundreds of single neurons in multiple brain circuits to investigate brain dynamics. Mapping neural dynamics in brain circuits with anatomical structures spanning several millimeters, however, remains challenging. Here, a CMOS neural probe advancing lateral sampling for mapping intracortical neural dynamics (both LFPs and spikes) in awake, behaving mice from an area >4 mm is demonstrated.

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: The study aimed to compare the treatment effectiveness of patients with locally advanced rectal cancer undergoing standard neoadjuvant therapy or total neoadjuvant therapy. It also sought to identify prognostic factors for disease-free survival and overall survival and parameters predictive of pathological complete response. : A retrospective analysis was conducted on 239 patients diagnosed with locally advanced rectal cancer between 2016 and 2022 at several medical centers in Turkey.

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Purpose: Desbuquois dysplasia type 1 is a rare autosomal recessive chondrodysplasia characterised by distinct skeletal abnormalities and multisystem involvement, including pulmonary, renal, and ocular abnormalities, has also been reported. Cardiac complications, although infrequently discussed in the literature, include aortopathy and atrioventricular valve prolapse, potentially due to defective proteoglycan production.

Case Report: This case report details a 7-year-old male diagnosed with Desbuquois dysplasia type 1 and a coronary-cameral fistula, both of which are exceedingly rare conditions.

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Approximately 90% of primary paediatric cardiac tumours are benign lesions. Depending on their location and size, benign cardiac tumours may cause inflow and outflow obstructions, cyanosis, valvular insufficiencies, myocardial ischaemia, associated dysfunction, systemic embolisation, arrhythmias, and even sudden death. Decision-making and timing for surgery can be challenging in children.

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Percutaneous interventions have become significant in the management of congenital heart diseases, with transcatheter procedures being increasingly used for valve dysfunction, particularly for cases requiring repetitive surgeries. This abstract presents a successful transcatheter valve-in-valve implantation in a 16-year-old patient with severe tricuspid regurgitation following a bioprosthetic tricuspid valve replacement. The procedure involved transcatheter tricuspid valve implantation using the Mammoth 25x40 mm balloon catheter and the 26 mm Myval transcatheter heart valve system (Meril Life Sciences Pvt.

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Cerebral autosomal-dominant arteriopathy, subcortical infarcts, and leukoencephalopathy (CADASIL) is the most prevalent monogenic inherited cause of cerebral small-vessel disease. Despite its prevalence, there is currently no proven therapy to prevent or reverse the progression of the disease. This study aimed to characterize the functional integrity of long white matter tracts in CADASIL transgenic mice, both with and without focal white matter lesions in the corpus callosum added on, utilizing optical resting-state functional connectivity imaging alongside behavioral examinations.

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: Immune checkpoint inhibitors (ICIs) have revolutionized cancer therapy, but their use is associated with a spectrum of immune-related adverse events (irAEs), including endocrine disorders. This study aims to investigate the incidence, timing, treatment modalities, and impact of ICI-related endocrine side effects in cancer patients. : This retrospective study analyzed 139 cancer patients treated with ICIs between 2016 and 2022.

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Introduction: Congenital cardiac defects are defined in cases with the deletion of the short arm of chromosome 5 and the duplication of the long arm of chromosome 4. Septal defects and patent ductus arteriosus are among the most common defects reported in the literature.

Case Presentation: We reported on a case with a complex congenital cardiac defect, dysmorphic facial features, cat-like cry, hypotonia, hyporeflexia, weak swallowing and sucking, limb anomalies, and bilateral undescended testicles.

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: Salvage treatment options have not been validated in relapsed or refractory germ cell tumors. Moreover, the study populations including these patients have different heterogeneities. This study aimed to evaluate the efficacy and safety of three cycles of TIP sequential high-dose chemotherapy in patients with testicular non-seminomatous germ cell tumors who relapsed or had a refractory course after first-line platinum-based chemotherapy.

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Background: Ebstein's anomaly represents 40% of congenital tricuspid valve abnormalities. Studies about paediatric Ebstein's anomaly patients are limited.

Aim: To evaluate clinical characteristics, treatment (medical/arrhythmia ablation/surgical) results, and outcome of Ebstein's anomaly patients, and to determine factors affecting arrhythmia presence and mortality.

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This randomized controlled study was conducted to evaluate the effects of telephone-assisted breastfeeding monitoring on physiological jaundice, exclusive breastfeeding in the first six months, colic, breastfeeding success, and breastfeeding self-efficacy. Breastfeeding and infant care training were given to pregnant women by video calls (N = 54). Video call counseling was provided to the mothers in the intervention group (n = 27) every day for the first week after discharge and weekly until the 24th week, and the control group (n = 27) was only telephone called in follow-up weeks.

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Highly selective inhibitors of cyclin-dependent kinase 4 and 6 (CDK4/6is) have emerged as a standart of care for first- and second-line therapies in combination with endocrine therapy (ET) for HR+/HER2- metastatic breast cancer (MBC) patients. It has been reported that combination therapy is more effective than ET alone and is safe in elderly patients as well as young patients. Nevertheless, elderly and very old patients with HR+/HER2-MBC treated with CDK4/6 inhibitor (CDK4/6i) combinations are relatively underrepresented in randomized controlled trials.

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Background: Current guidelines advise exercise for most congenital heart disease patients (CHD). However, physical activity remains low in CHD individuals, with limited research on exercise's effects in adults.

Objectives: The aim of this study is to evaluate the safety and efficacy of exercise training on exercise capacity and quality of life in adult congenital heart disease (ACHD) patients.

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Objective: Interictal cognitive disturbances are frequent in patients with focal epilepsies and the links with alteration of resting state brain oscillations are not well known. Changes in theta oscillations, may contribute to cognitive impairment. This study aimed to investigate whether changes in theta activity are related to cognitive disturbances.

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Article Synopsis
  • Fanconi anemia (FA) is a genetic condition leading to bone marrow failure, and while hematopoietic stem cell transplantation (HSCT) can provide long-term survival, patients face ongoing health challenges after treatment.
  • A study of 36 FA patients who had undergone HSCT showed significant long-term issues, including hormonal imbalances, growth impairments, and signs of metabolic syndrome, highlighting the need for better follow-up care guidelines.
  • Key findings included gonadal dysfunction in 35% of patients, pulmonary function issues in nearly half, and a small percentage developing secondary cancers, emphasizing the importance of addressing late effects of HSCT in FA survivors.
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Fontan patients' exercise capacity and associated risks of morbidity and mortality necessitate a comprehensive study. We aim to explore maximal and submaximal exercise capacity, assessing the impact of cardiovascular and peripheral factors, including atrial strain, aortic stiffness, and muscle-related factors. Fontan patients and matched controls were examined.

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Purpose: The study aimed to assess frailty in adults with congenital heart disease (ACHD) and to compare muscle strength, functional capacity, activities of daily living (ADL), and cognition between frail and non-frail ACHD patients.

Materials And Methods: A cross-sectional study design was used. Sixty people with ACHD aged between 18 and 45 years were included.

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Prosthetic valve thrombosis (PVT) is a critical and life-threatening condition driven by multifactorial etiologies, including genetic predispositions. The study was designed as a single-center retrospective manner. Echocardiographic features and genetic test including factor II/prothrombin (G20210A), factor V Leiden (G1691A), factor V R2 (A4070G), apolipoprotein (Apo) B-100 (G10708A), ApoE (C112R), ApoE (R158C), methylenetetrahydrofolate reductase (MTHFR) C677T, MTHFR A1298C, factor XIII G103T (V34L), β-fibrinogen (455G>A), PAI-1 4G/5G, and HPA-1 GPIIIa (T196C) genotyping variations were assessed.

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This article presents an anatomical variation of the very high take-off right coronary artery from the ascending aorta. Clinical care is complicated by the patient's double outlet right ventricle and right aortic arch associated with this situation.

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Introduction: Although separate immunogenic mechanisms are involved, IgE-type sensitization to wheat and celiac disease (CD) may coexist. We observationally assessed the importance of this relationship in daily practice using CD and wheat sensitization screenings.

Methods: Celiac antibody (CA) screening and food prick tests (FPTs) were requested simultaneously from patients who presented to the Allergy Clinic between January 2022 and December 2023 and had any complaint accompanied by CD symptoms/findings (non-celiac group).

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Aims: Less than 50% of patients treated for hypertension reach a target office systolic blood pressure (SBP). We aimed to evaluate the role of adiposity on antihypertensive drug responses in newly diagnosed hypertensive patients.

Methods: Estimated glomerular filtration rates, body mass index (BMI), skinfold thickness (SFT), body surface areas and waist circumferences of 150 hypertensive patients naïve to treatment were measured.

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Implantable active dense CMOS neural probes unlock the possibility of spatiotemporally resolving the activity of hundreds of single neurons in multiple brain circuits to investigate brain dynamics. Mapping neural dynamics in brain circuits with anatomical structures spanning several millimeters, however, remains challenging. Here, we demonstrate the first CMOS neural probe for mapping intracortical neural dynamics (both LFPs and spikes) in awake, behaving mice from an area >4 mm.

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Purpose: In advanced breast cancer, endocrine therapy is preferred in the absence of visceral crisis. Cyclin-dependent kinase inhibitors (CDKi) are the gold standards. The selection of subsequent treatments after CDKi treatment is still controversial, and the efficacy of everolimus (EVE) combinations is unknown.

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Background:  Although there are considerable amounts of data on the outcomes of pediatric patients who have undergone Fontan repair, little is known about having Fontan completed in adulthood. The study presented the midterm results of our unit's experience with the Fontan completion procedure in adult patients with functionally univentricular hearts.

Methods:  Between 2014 and 2023, 16 adult patients underwent total cavopulmonary connection (TCPC) completion.

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