Diagnosis and Management of Thoracolumbar Spinal Disorders Presenting as Cardiac, Gastrointestinal, and Other False Pain Syndromes.

Summary Of Background Data: Although pseudoangina is most commonly caused by cervical disc herniation, several cases have been described where thoracic herniation produced symptoms of pseudoangina. If thoracic herniation can produce angina-like pain, then it is important to consider whether pathology of the thoracolumbar spine, in general, can trigger false pain syndromes distinct from pseudoangina.

Objective: We seek to provide the most comprehensive study regarding the diagnosis and treatment of spinal conditions causing false pain syndromes.

The association of thromboembolic complications and the use of tranexamic acid during resection of intracranial meningiomas: systematic review and meta-analysis of randomized controlled trials.

Objective: Antifibrinolytics, such as tranexamic acid (TXA), have been shown to decrease intraoperative blood loss across multiple surgical disciplines. However, they carry the theoretical risk of thromboembolic events secondary to induced hypercoagulability. Therefore, the aim of this study was to systematically review the available literature and perform a meta-analysis on the use of TXA in meningioma resection to assess thromboembolic risks.

Plasma-Assisted Chemical-Looping Combustion: Low-Temperature Methane and Ethylene Oxidation with Nickel Oxide.

The chemical reaction network of low-temperature plasma-assisted oxidation of methane (CH) and ethylene (CH) with nickel oxide (NiO) was investigated in a heated plasma reactor through time-dependent species measurements by electron-ionization molecular beam mass spectrometry (EI-MBMS). Methane (ethylene) oxidation by NiO was explored in temperature ranges from 300-700 °C (300-500 °C) and 300-800 °C (300-600 °C) for the plasma and nonplasma conditions. Significant enhancement of methane oxidation was observed with plasma between 400 and 500 °C, where no oxidation was observed under nonplasma conditions.

Pedestrian crash frequency: Unpacking the effects of contributing factors and racial disparities.

In this paper, we unpack the magnitude effects of the determinants of pedestrian crashes using a multivariate analysis approach. We consider four sets of exogenous factors that characterize residential neighborhoods as well as potentially affect pedestrian crashes and the racial composition of such crashes: (1) crash risk exposure (CE) attributes, (2) cultural variables, (3) built environment (BE) features, and (4) sociodemographic (SD) factors. Our investigation uses pedestrian crash and related data from the City of Houston, Texas, which we analyze at the spatial Census Block Group (CBG) level.

Near-Surface Gas-Phase Methoxymethanol Is Generated by Methanol Oxidation over Pd-Based Catalysts.

Catalytic conversion of alcohols underlies many commodity and fine chemical syntheses, but a complete mechanistic understanding is lacking. We examined catalytic oxidative conversion of methanol near atmospheric pressure using operando small-aperture molecular beam time-of-flight mass spectrometry, interrogating the gas phase 500 μm above Pd-based catalyst surfaces. In addition to a variety of stable C species, we detected methoxymethanol (CHOCHOH)─a rarely observed and reactive C oxygenate that has been proposed to be a critical intermediate in methyl formate production.

30-Day Outcomes Following Transfemoral Transseptal Transcatheter Mitral Valve Replacement: Intrepid TMVR Early Feasibility Study Results.

Objectives: The aim of this study was to evaluate outcomes of transcatheter mitral valve replacement (TMVR) with transfemoral access in patients at prohibitive or high surgical risk.

Background: Prohibitive surgical risk may preclude mitral valve replacement surgery in some patients. The investigational Intrepid TMVR system has previously been evaluated using transapical access for delivery of a self-expanding bioprosthetic valve.

Experimental Observation of Hydrocarbon Growth by Resonance-Stabilized Radical-Radical Chain Reaction.

Rapid molecular-weight growth of hydrocarbons occurs in flames, in industrial synthesis, and potentially in cold astrochemical environments. A variety of high- and low-temperature chemical mechanisms have been proposed and confirmed, but more facile pathways may be needed to explain observations. We provide laboratory confirmation in a controlled pyrolysis environment of a recently proposed mechanism, radical-radical chain reactions of resonance-stabilized species.

The market landscape of online second opinion services for spine surgery.

Background: The aim of this study was to identify patient interest in second opinion services online and identify the options patients have in obtaining second opinions from spine surgeons in the United States.

Methods: We utilized Google Trends (i.e.

Three Generations of Self-Expanding Transcatheter Aortic Valves: A Report From the STS/ACC TVT Registry.

Objectives: The aim of this study was to assess the evolution of early outcomes for 3 iterative self-expanding transcatheter aortic valves.

Background: Over the past decade there have been rapid advancements in transcatheter aortic valve replacement (TAVR) technologies, including 3 generations of supra-annular self-expanding transcatheter systems.

Methods: Data from the Society of Thoracic Surgeons/American College of Cardiology TVT (Transcatheter Valve Therapy) Registry for patients undergoing TAVR with CoreValve, Evolut R, or Evolut PRO valves to treat tricuspid aortic stenosis between January 2014 and September 2017 were obtained.

Grill Brush Bristle Case Series: Three Unique Presentations of Ingested Foreign Bodies.

BACKGROUND Much of the medical literature regarding injury from the ingestion of wire bristles from grill brushes has been published only in the last decade. Grill brushes are often used to clean grills, and small wire bristles may break off of the brush during the scrubbing process and subsequently become embedded into food and are accidently ingested. Fewer reports have been published on abdominal presentations with injuries past the gastroesophageal sphincter, yet perforation and subsequent need for operative management has been shown to be more prevalent in these types of cases.

Comparison of Clinical and Echocardiographic Outcomes After Transcatheter Aortic Valve Implantation With 31-mm CoreValve Versus 34-mm Evolut R Bioprostheses from the STS/ACC TVT Registry.

Transcatheter aortic valve implantation with a bioprosthetic valve of insufficient size is associated with a higher risk of aortic regurgitation (AR). The 31-mm CoreValve and the next generation 34-mm Evolut R bioprostheses were designed to address the need for larger diameter aortic annuli. This analysis examined the clinical and hemodynamic outcomes following commercial transcatheter aortic valve implantation with the 31-mm CoreValve and 34-mm Evolut R in the Society of Thoracic Surgeons/the American College of Cardiology Transcatheter Valve Therapy Registry.

Self-Expanding Valve System for Treatment of Native Aortic Regurgitation by Transcatheter Aortic Valve Implantation (from the STS/ACC TVT Registry).

Transcatheter aortic valve implantation (TAVI) is approved for treatment of symptomatic aortic stenosis in patients at increased risk for surgical valve replacement, but outcomes data in patients with severe native aortic regurgitation (AR) treated with TAVI remain limited. The objective of this analysis was to evaluate outcomes among patients identified in the Society of Thoracic Surgeons/American College of Cardiology Transcatheter Valve Therapies Registry who underwent TAVI for native AR with a commercially available self-expanding valve system. From January 2014 to December 2017, 230 patients in the TVT Registry underwent TAVI for primary severe native AR using a commercially available self-expanding valve (n = 81, CoreValve; n = 149, Evolut R).

Mesial temporal extraventricular neurocytoma (mtEVN): A case report and literature review.

Aim: We describe a case of mesial temporal extraventricular neurocytoma (mtEVN) in a 23-year-old male presenting with drug-resistant seizures and review the literature on this rare tumor.

Methods: A PubMed search was queried using the MeSH term "neurocytoma" and key search terms "extraventricular", "temporal", and "epilepsy". Titles and abstracts were screened for temporal neurocytomas.

Impact of Balloon Predilatation on Hemodynamics and Outcomes After Transcatheter Aortic Valve Implantation With the Self-Expanding CoreValve Prosthesis.

The impact of predilatation (Pre-Dil) on prosthesis hemodynamics and clinical outcomes of subjects who underwent transcatheter aortic valve implantation (TAVI) with a self-expanding prosthesis remains unclear. Two thousand seven hundred twenty-one subjects from the extreme- and high-risk CoreValve Continued Access Study (CAS) were included in the analysis. Subjects who underwent Pre-Dil before TAVI were compared with subjects who underwent TAVI without Pre-Dil.

Outcomes of 270 Consecutive Deep Inferior Epigastric Perforator Flaps for Breast Reconstruction.

Background: The deep inferior epigastric perforator (DIEP) flap has gradually become the superior choice for autologous breast reconstruction because it reduces donor site morbidity, abdominal wall complications, and postoperative recovery time when compared with other flap types.

Methods: The purposes of this study are to report on the experience and clinical outcomes of consecutive DIEP flap breast reconstructions performed by a single surgeon at a cancer center between April 2011 and May 2016 and to characterize the trends among these flaps.

Results: Two hundred seventy DIEP flaps from 202 consecutive patients were assessed.

Outcomes in Deep Inferior Epigastric Perforator Flap and Implant-Based Reconstruction: Does Age Really Matter?

Despite the growing elderly population, there is limited research specific to this demographic concerning breast reconstruction (BR). Lack of evidence-based BR recommendations in older populations may contribute to misconceptions and subsequent underutilization of BR, especially autologous BR. Patients who received either deep inferior epigastric perforator (DIEP) flap BR or tissue expander/implant (TE/I) BR by a single surgeon between July 2011 and July 2015 were surveyed postoperatively by using the psychometrically validated BREAST-Q questionnaire to determine patient satisfaction.

Direct Aortic Access for Transcatheter Aortic Valve Replacement Using a Self-Expanding Device.

Background: Transcatheter aortic valve replacement (TAVR) using a self-expanding valve has been shown to be superior to an open operation in high-risk patients. Extensive iliofemoral peripheral vascular disease can prohibit femoral access. In these cases, direct aortic (DA) implantation may be a suitable option.

Evaluation of Postgraduates Following Implementation of a Focus Assessed Transthoracic Echocardiography (FATE) Training Course-A Pilot Study.

At our institution, implementation of a formal training course in Basic Focus Assessed Transthoracic Echocardiography (FATE) was associated with an improvement in anesthesia trainees' ability to obtain transthoracic echocardiography (TTE) images. Total image acquisition scores improved by a median (Q1, Q3) 9.1 (2.

Midterm Outcomes With a Self-Expandable Transcatheter Heart Valve in Japanese Patients With Symptomatic Severe Aortic Stenosis.

Background: Transcatheter aortic valve implantation (TAVI) is a viable alternative to surgical aortic valve replacement in high-risk or inoperable patients with aortic stenosis (AS). Here we report the midterm outcomes of high-risk Japanese patients with severe AS who underwent TAVI with a self-expandable TAV.

Methods and results: The CoreValve Japan Trial was a prospective, multicenter trial of the CoreValve System.