Publications by authors named "Schanzer A"

Importance: Fenestrated and branched endovascular aortic repairs (F/BEVAR) have been adopted by many centers. However, national trends of F/BEVAR use remain unclear, particularly at sites who perform them without an US Food and Drug Adminstration (FDA)-approved investigational device exemption (IDE).

Objective: To quantify the use of F/BEVAR in the US and to determine if mortality was different at IDE vs non-IDE sites.

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Objective: Wound, Ischemia, and foot Infection (WIfI) staging was established to provide objective classification in patients with chronic limb-threatening ischemia (CLTI) and to predict 1-year major amputation risk. Our goal was to validate WIfI staging using data from the Best Endovascular vs Best Surgical Therapy in Patients with CLTI (BEST-CLI) trial.

Methods: Data from the BEST-CLI Trial, a prospective randomized trial comparing surgical revascularization (OPEN) and endovascular revascularization (ENDO), were used to assess the association of WIfI stage on long-term outcomes in an intention-to-treat analysis.

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Veins have emerged as the origin of all other endothelial cell subtypes needed to expand vascular networks during developmental and pathological neoangiogenesis. Here, we uncover the role of the angioneurin Fibronectin Leucine Rich Transmembrane protein (FLRT) 2 in central nervous system (CNS) vascular development in the mouse. Early postnatal FLRT2 deletion reveals specific defects in retinal veins, impacting endothelial cell proliferation, sprouting and polarity that result in reduced tip cells at the vascular front.

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Objectives: To investigate the histopathological features of the temporalis muscle (TM) and adjacent nerve tissue in active cranial giant cell arteritis (C-GCA).

Methods: Temporal artery biopsy (TAB) specimens containing fragments of the TM from patients with active C-GCA fulfilling the 2022 ACR/EULAR classification criteria (n = 11) were assessed by conventional histology and immunohistochemistry in comparison with non-GCA controls (n = 3). Clinical, laboratory and imaging features based on patient charts at time of biopsy were retrospectively recorded.

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To gain a deeper understanding of skeletal muscle function in younger age and aging in elderly, identification of molecular signatures regulating these functions under physiological conditions is needed. Although molecular studies of healthy muscle have been conducted on adults and older subjects, there is a lack of research on infant muscle in terms of combined morphological, transcriptomic and proteomic profiles. To address this gap of knowledge, we performed RNA sequencing (RNA-seq), tandem mass spectrometry (LC-MS/MS), morphometric analysis and assays for mitochondrial maintenance in skeletal muscle biopsies from both, infants aged 4-28 months and adults aged 19-65 years.

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Objective: Single segment great saphenous vein (SSGSV) traditionally has been considered the gold standard conduit for infrainguinal bypass. There are data supporting similar outcomes with prosthetic femoral-popliteal bypass. Moreover, some investigators have advocated for prosthetic conduit for femoral tibial bypass when GSV is inadequate or unavailable.

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Introduction: Chronic muscle pain is common in myotonic dystrophies (DM). Little is known about its pathophysiology. We aimed to investigate the characteristics of the neuropathic pain component contributing contributes to the pathogenesis of chronic pain in DM.

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Background: The use of standard bifurcate pieces in fenestrated/branched endovascular aortic repair (F/BEVAR) requires adequate length from the lowest branch or fenestration to the aortic bifurcation. In patients with prior aortic surgery, the aortic bifurcation is often artificially established in a more proximal position, compromising the infrarenal length, which hinders the placement of a standard bifurcate component below the fenestrated/branched component. Short bifurcate bodies using an inverted contralateral limb have been purpose-built to address this challenge.

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Article Synopsis
  • - The study focuses on improving the diagnosis of idiopathic inflammatory myopathies (IIM) by quantifying key proteins (MHC-1, MHC-2, ICAM-1) using an automated method to reduce biases associated with traditional diagnostic approaches.
  • - Researchers conducted double immunofluorescence staining and RNA sequencing on muscle biopsies from various IIM subtypes, finding distinct immunological profiles and confirming the effectiveness of their method through RNA-Seq results.
  • - Results indicate that ICAM-1 is particularly significant for diagnosis, showing high sensitivity and specificity in differentiating IIM subtypes, and the study suggests that automated analysis can enhance the understanding of these diseases.
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Article Synopsis
  • * A study used advanced techniques to analyze muscle biopsy samples from 26 patients, revealing common features such as heightened immune response markers, myofiber damage, and significant protein accumulation related to cell stress.
  • * Findings indicated that anti-Ku myositis displays unique histopathological characteristics, distinguishing it from other conditions like inclusion body myositis and immune-mediated necrotizing myopathy, while also showing connections to specific syndromes like systemic sclerosis.
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Background: Fenestrated-branched endovascular aortic repair (FB-EVAR) has been used as a minimally invasive alternative to open surgical repair to treat patients with thoracoabdominal aortic aneurysms (TAAAs). The aim of this study was to evaluate aortic-related mortality (ARM) and aortic aneurysm rupture after FB-EVAR of TAAAs.

Methods: Patients enrolled in 8 prospective, nonrandomized, physician-sponsored investigational device exemption studies between 2005 and 2020 who underwent elective FB-EVAR of asymptomatic intact TAAAs were analyzed.

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Objective: BEST-CLI, an international randomised trial, compared an initial strategy of bypass surgery with endovascular treatment in chronic limb threatening ischaemia (CLTI). In this substudy, overall amputation rates and risk of major amputation as an initial or subsequent outcome were evaluated.

Methods: A total of 1 830 patients were randomised to receive surgical or endovascular treatment in two parallel cohorts: patients with adequate single segment great saphenous vein (SSGSV) (n = 1 434) were assigned to cohort 1; and patients without adequate SSGSV (n = 396) were assigned to cohort 2.

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Article Synopsis
  • This study looks at how the size of an aortic aneurysm (a balloon-like bulge in a blood vessel) changes after a special surgery called FBEVAR, which is used for certain types of aneurysms.
  • Researchers found that out of 290 patients, some had the size of their aneurysm grow while others saw it shrink, and some stayed the same after surgery.
  • They discovered that older patients and those with a specific type of problem called type II endoleaks were more likely to have their aneurysm size get bigger after the surgery.
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Idiopathic inflammatory myopathies (IIM) are rare diseases (incidence 1:100,000) with a wide range of clinical symptoms and manifestations. Typical indicators of IIM are proximally emphasized muscle weakness and myalgias, which are usually accompanied by elevated creatine kinase levels and muscle atrophy. The autoantibody diagnostics separate IIM into different entities, which are each associated with a typical risk of organ manifestations and the occurrence of tumors.

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The HSP70 co-chaperone BAG3 targets unfolded proteins to degradation via chaperone assisted selective autophagy (CASA), thereby playing pivotal roles in the proteostasis of adult cardiomyocytes (CMs). However, the complex functions of BAG3 for regulating autophagy in cardiac disease are not completely understood. Here, we demonstrate that conditional inactivation of Bag3 in murine CMs leads to age-dependent dysregulation of autophagy, associated with progressive cardiomyopathy.

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Objective: Antiplatelet and/or anticoagulant therapy are commonly prescribed after fenestrated/branched endovascular aortic repair (F/BEVAR). However, the optimal regimen remains unknown. We sought to characterize practice patterns and outcomes of antiplatelet and anticoagulant use in patients who underwent F/BEVAR.

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Objective: The clinical significance of family history (FH) of aortic disease on the outcomes of fenestrated and branched endovascular aneurysm repair (FB-EVAR) has not been well described. This study aimed to assess how FH of aortic disease affects outcomes following FB-EVAR for complex aortic aneurysms (CAAs).

Methods: This study retrospectively reviewed the clinical data of consecutive patients enrolled in 10 ongoing, prospective, non-randomised, physician sponsored, investigational device exemption studies to evaluate FB-EVAR (2005 - 2022) in the United States Aortic Research Consortium database.

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Using ferric chloride (FeCl3) to induce experimental superior sagittal sinus (SSS) thrombosis might interfere with magnetic resonance imaging (MRI)-assisted visualization and evaluation of the thrombus, the brain parenchyma, and the quality of the occlusion. The aim of this study was to investigate whether aluminum chloride (AlCl3)-induced thrombosis of the SSS has comparable properties to those of FeCl3 without causing artifacts in MRI. SSS thrombosis was induced in 14 male Wistar rats by exposure of the SSS and subsequent topical application of a filter paper strip soaked in AlCl3 (n = 7) or FeCl3 (n = 7) over a period of 15 min.

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Background: Polyvascular disease is strongly associated with increased risk of cardiovascular morbidity and mortality. However, its prevalence in patients undergoing carotid and lower extremity surgical revascularization and its impact on outcomes are unknown.

Methods: The Vascular Quality Initiative was queried for carotid endarterectomy (CEA) or infrainguinal lower extremity bypass (LEB), 2013-2019.

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Article Synopsis
  • Researchers studied the one-year survival rates of patients who underwent elective repair of complex abdominal and thoracoabdominal aortic aneurysms, focusing on identifying preoperative risk factors for mortality.
  • Data from the US-Aortic Research Consortium covering patients from 2005 to 2022 was analyzed, utilizing multivariable Cox regression and logistic regression to assess factors influencing survival outcomes.
  • Key risk factors linked to one-year mortality included being a current smoker, having chronic obstructive pulmonary disease, congestive heart failure, older age, larger aortic diameter, and poor kidney function, which were used to develop a predictive model for patient-specific risk profiles.
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Objective: Cumulative, probability-based metrics are regularly used to measure quality in professional sports, but these methods have not been applied to health care delivery. These techniques have the potential to be particularly useful in describing surgical quality, where case volume is variable and outcomes tend to be dominated by statistical "noise." The established statistical technique used to adjust for differences in case volume is reliability-adjustment, which emphasizes statistical "signal" but has several limitations.

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Article Synopsis
  • Endovascular techniques have improved treatments for thoracoabdominal aortic aneurysms (TAAAs), but spinal cord ischemia (SCI) remains a significant challenge, with cerebrospinal fluid (CSF) drainage proposed as a preventive measure.
  • A pilot study was conducted to explore the feasibility of a larger trial comparing the effectiveness of prophylactic CSF drains versus therapeutic CSF drains in preventing SCI during endovascular repair surgery.
  • In this study, 20 patients were successfully randomized into two groups for treatment, and no significant differences in demographics or surgical history were observed between the groups.
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Cardiomyocyte maturation during pre- and postnatal development requires multiple intertwined processes, including a switch in energy generation from glucose utilization in the embryonic heart towards fatty acid oxidation after birth. This is accompanied by a boost in mitochondrial mass to increase capacities for oxidative phosphorylation and ATP generation required for efficient contraction. Whether cardiomyocyte differentiation is paralleled by augmented capacities to deal with reactive oxygen species (ROS), physiological byproducts of the mitochondrial electron transport chain (ETC), is less clear.

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