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https://www.readbyqxmd.com/read/29239759/alternative-treatment-options-for-atrioventricular-nodal-reentry-tachycardia-an-emergency-medicine-review
#1
Sarah Brubaker, Brit Long, Alex Koyfman
BACKGROUND: Atrioventricular-nodal-reentry tachycardia (AVNRT) is a form of supraventricular tachycardia (SVT) that is relatively common in the emergency department (ED). It is rarely indicative of underlying electrical or structural pathology. OBJECTIVE: This review evaluates the literature and controversies concerning treatment of AVNRT in the ED. DISCUSSION: For treatment of narrow-complex tachycardia, Advanced Cardiovascular Life Support guidelines recommend the use of vagal maneuvers, followed by adenosine...
November 24, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29239471/age-related-changes-in-the-morphology-and-the-distribution-of-iga-and-igg-in-the-palatine-tonsils-of-yaks-bos-grunniens
#2
Juan Sun, Yuanfang Xu, Yan Cui, Penggang Liu, Sijiu Yu, Junfeng He, Qian Zhang, Yufeng Huang, Xue Yang
This study aimed to describe the age-related morphological changes and the distribution of IgA and IgG antibody-secreting cells (ASCs) in yaks. The palatine tonsils of twenty clinically healthy yaks, viz. newborn juvenile, adult and aged, were studied using histology, immunohistochemistry, and enzyme-linked immunosorbent assay (ELISA). The results showed that the palatine tonsils found in two tonsillar sinus were elongated kidney-shaped structures. Some external crypts and internal crypts were present. The palatine tonsils were partially enclosed by a connective tissue capsule and had trabeculae extending into the organ...
December 14, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/29226547/avian-embryonic-coronary-arterio-venous-pattering-involves-the-contribution-of-different-endothelial-and-endocardial-cell-populations
#3
Paul Palmquist-Gomes, Juan Antonio Guadix, José M Pérez-Pomares
BACKGROUND: Coronary vasculature irrigates the myocardium and is crucial to late embryonic and adult heart function. Despite the developmental significance and clinical relevance of these blood vessels, the embryonic origin and the cellular and molecular mechanisms that regulate coronary arterio-venous patterning are not known in detail. In this study, we have used the avian embryo to dissect the ontogenetic origin and morphogenesis of coronary vasculature. RESULTS: We show that sinus venosus endocardial sprouts and proepicardial angioblasts pioneer coronary vascular formation, invading the developing heart simultaneously...
December 11, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/29193866/revisit-the-cavernous-sinus-from-fetus-to-adult-new-and-old-data
#4
REVIEW
Maggie Sm Chow, Sharon L Wu, Vivian Hui, Tony Ch Chow, D T Yew
This paper highlighted three advances in the study of the cavernous sinus: 1) the initial formation of the sinus reticulum in early development of the sphenoid bone before ossification 2) extension of reticulum of the sinus and connection with other venules and 3) the cavernous sinus and the nerves evolved inside this sinus during gestation, for example, the trigeminal nerve already formed bundles of motor and parasympathetic components during fetal development. This ontogenetic study further confirmed the cavernous sinus is not a single or a dual set of sinuses, but a group of extensions of venous sinuses or sinusoids...
November 28, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29187780/the-skull-of-epidolops-ameghinoi-from-the-early-eocene-itabora%C3%A3-fauna-southeastern-brazil-and-the-affinities-of-the-extinct-marsupialiform-order-polydolopimorphia
#5
Robin M D Beck
The skull of the polydolopimorphian marsupialiform Epidolops ameghinoi is described in detail for the first time, based on a single well-preserved cranium and associated left and right dentaries plus additional craniodental fragments, all from the early Eocene (53-50 million year old) Itaboraí fauna in southeastern Brazil. Notable craniodental features of E. ameghinoi include absence of a masseteric process, very small maxillopalatine fenestrae, a prominent pterygoid fossa enclosed laterally by a prominent ectopterygoid crest, an absent or tiny transverse canal foramen, a simple, planar glenoid fossa, and a postglenoid foramen that is immediately posterior to the postglenoid process...
2017: Journal of Mammalian Evolution
https://www.readbyqxmd.com/read/29139551/members-of-the-deal-subfamily-of-the-duf1218-gene-family-are-required-for-bilateral-symmetry-but-not-for-dorsoventrality-in-arabidopsis-leaves
#6
David Wilson-Sánchez, Sebastián Martínez-López, Sergio Navarro-Cartagena, Sara Jover-Gil, José Luis Micol
Most plant leaves exhibit bilateral symmetry, which has been hypothesized as an inevitable consequence of the existence of the proximodistal and dorsoventral axes. No gene has been described that affects leaf bilateral symmetry but not dorsoventrality in Arabidopsis thaliana. We screened for viable insertional mutations that affect leaf morphology, and out of more than 700 mutants found only one, desigual1-1 (deal1-1), that exhibited bilateral symmetry breaking but no obvious defects in dorsoventrality. We found that deal1-1 is an allele of VASCULATURE COMPLEXITY AND CONNECTIVITY (VCC)...
November 15, 2017: New Phytologist
https://www.readbyqxmd.com/read/29135395/pattern-and-predictors-of-paradoxical-response-in-patients-with-peripheral-lymph-node-tuberculosis
#7
Supreet Batra, Govind Singh Rajawat, Rajendra Prasad Takhar, Manohar Lal Gupta
Introduction: Many of the patients with lymph node tuberculosis show 'Paradoxical Response" in the form of appearance of new lymph node (LN) or increase in the size of existing LN, development of new disease in other organ and worsening of the disease while on treatment. Reason behind such response in only selective patients is not clearly understood. We evaluated the pattern and predictors for paradoxical response(s) (PR) in patients with peripheral lymph node tuberculosis (TB). Materials and Methods: Study included patients aged > 6 years with peripheral lymphadenopathy of tubercular etiology attending a tertiary care hospital from Jan 2010 to Dec 2010...
September 2017: Tüberküloz Ve Toraks
https://www.readbyqxmd.com/read/29126165/foramen-magnum-dural-arteriovenous-fistulas-clinical-presentations-and-treatment-outcomes-a-case-series-of-12-patients
#8
Mogwale S Motebejane, In Sup Choi
BACKGROUND: Dural arteriovenous fistulas (DAVFs) are usually seen in relation to the venous sinuses, but in certain rare instances fistulas may not drain directly into the venous sinuses but rather drain into the cortical veins. This rare form of DAVF may present with either intracranial hemorrhage or myelopathy. The mode of clinical presentation is influenced by the venous outflow into either intracranial drainage or caudally intraspinal drainage. OBJECTIVE: To evaluate the clinical presentations, angioarchitectural characteristics, and treatment of 12 patients who presented with DAVF in the region of the foramen magnum...
November 8, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29076466/-a-supraorbital-trans-eyebrow-approach-in-surgery-of-chiasmatic-sellar-and-anterior-cranial-fossa-tumors
#9
A G Alekseev, A A Pichugin, V I Danilov
OBJECTIVE: to analyze 31 resections of chiasmatic-sellar region (CSR) and anterior cranial fossa (ACF) tumors using the supraorbital trans-eyebrow approach (STA). MATERIAL AND METHODS: We analyzed medical histories of 31 patients who underwent tumor resection using STA in the period between October 2013 and April 2017. We analyzed the age and gender of patients, size and location of the tumor, presence of a neurological deficit, vision and olfactory functions before and after surgery, surgery duration, amount of intraoperative blood loss, rate of frontal sinus trephination and nasal liquorrhea, hemorrhagic and ischemic complications after surgery, Simpson grade of tumor resection, patient's condition before and after surgery (Glasgow Outcome Scale and Karnofsky Scale), and degree of patient satisfaction with the cosmetic result of surgery...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/29073338/transdifferentiation-of-adult-rat-stem-leydig-cells-into-prostatic-and-uterine-epithelium-but-not-epidermis
#10
M K Nanjappa, T I Medrano, G S Prins, H Chen, B R Zirkin, P S Cooke
Stem Leydig cells (SLCs), precursors of testicular Leydig cells that secrete testosterone required for male sexual differentiation, spermatogenesis, and fertility, were recently identified in rat testes. Various types of stem cells have shown the ability to differentiate into other tissues, but there is no information on the plasticity of adult rat SLCs (rSLCs). This study investigated the ability of rSLCs to transdifferentiate into cell types from all three germ layers-prostatic epithelium (endoderm), uterine epithelium (mesoderm), and epidermis (ectoderm)-under the influence of inductive mesenchyme from fetal and neonatal tissues...
November 2017: Andrology
https://www.readbyqxmd.com/read/29072237/pain-intensity-and-its-objective-determinants-following-implant-surgery-and-sinus-lifting-a-1-year-prospective-study
#11
B Atalay, M Ramazanoglu, E N Tozan, H Ozyuvaci
OBJECTIVES: The main goal of this study was to evaluate the relationship between postoperative pain and short-term implant survival. Objective parameters, such as implant-related factors (type, diameter, length) and the surgical approach were also assessed to correlate them with pain. MATERIALS AND METHODS: This prospective, single-center study consisted of 144 patients scheduled for the surgical placement of one or more implants either with conventional surgery or with sinus-lifting together...
September 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29035825/effect-of-a-combination-of-mometasone-furoate-levofloxacin-and-retinyl-palmitate-with-an-in-situ-gel-forming-nasal-delivery-system-on-nasal-mucosa-damage-repair-in-an-experimental-rabbit-model
#12
Fadlullah Aksoy, Remzi Dogan, Orhan Ozturan, Ebru Altuntas, Fatma Gülgün Yener, Gulactı Topcu, Beril Guler
BACKGROUND: In this study a combination of Mometasone Furoate (MF)+Levofloxacin hemihydrate (LH)+Retinyl palmitate (RP) with an in situ gel-forming delivery system was evaluated at different stages of nasal mucosal damage repair in a rabbit maxillary sinus model. METHODS: In this study, 28 rabbits were included and assigned randomly to four groups. In all rabbits, a standard ostium was opened in the medial wall of the maxillary sinus by using a drill. Two different subsequently prepared gels with an in situ gel-forming delivery system were used...
October 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29024227/impact-of-atrial-fibrillation-on-rest-and-exercise-haemodynamics-in-heart-failure-with-mid-range-and-preserved-ejection-fraction
#13
David M Kaye, Frank E Silvestry, Finn Gustafsson, John G Cleland, Dirk J van Veldhuisen, Piotr Ponikowski, Jan Komtebedde, Shane Nanayakkara, Dan Burkhoff, Sanjiv J Shah
AIMS: Heart failure with preserved (HFpEF) and mid-range ejection fraction (HFmrEF) are becoming the most prevalent forms of heart failure. Patients with HFpEF/HFmrEF in atrial fibrillation (AF) have poorer survival and quality of life, but the mechanism underpinning this is unknown. We sought to investigate the influence of AF on the haemodynamic profile of HFpEF/HFmrEF patients at rest and during exercise. METHODS AND RESULTS: We invasively measured central haemodynamics at rest and during symptom-limited supine bicycle exercise in HFpEF/HFmrEF patients, 35 in sinus rhythm and 20 in AF with matched left ventricular ejection fraction...
October 11, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29016835/quality-of-life-is-not-improved-after-mitral-valve-surgery-combined-with-epicardial-left-atrial-cryoablation-as-compared-with-mitral-valve-surgery-alone-a-substudy-of-the-double-blind-randomized-swedish-multicentre-atrial-fibrillation-study-swedmaf
#14
Louise Bagge, Johan Probst, Steen M Jensen, Per Blomström, Stefan Thelin, Anders Holmgren, Carina Blomström-Lundqvist
Aims: Concomitant surgical ablation of atrial fibrillation (AF) in patients undergoing mitral valve surgery (MVS) has almost become routine despite lack of convincing information about improved quality-of-life (QOL) and clinical benefit. Quality-of-life was therefore assessed after MVS with or without epicardial left atrial cryoablation. Methods and results: Sixty-five patients with permanent AF randomized to MVS with or without left atrial cryoablation, in the double-blinded multicentre SWEDMAF trial, replied to the Short Form 36 QOL survey at 6 and 12 months follow-up...
August 19, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28980596/-certain-morphometric-characteristics-of-the-normal-maxillary-sinus
#15
D A Shcherbakov, A I Kryukov, V N Krasnozhen, A I Hukumatshoev, A I Karimova
Maxillary sinus is more than any other paranasal sinuses amenable to various pathological conditions that may require the surgical treatment. The objective of the present work was to study the age-related and the individual specific anatomical features of the walls of the maxillary sinus and to develop the principles of sinus surgery based on the results of the anthropometric studies. We analyzed the cone-beam CT scans obtained from 586 patients at the age varying from 5 to 60 years who were allocated to six different groups...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28979012/focal-dermal-hypoplasia-goltz-syndrome-a-cross-sectional-study-from-eastern-india
#16
Sudip Kumar Ghosh, Abhijit Dutta, Sharmila Sarkar, Shanka Subhra Nag, Surajit Kumar Biswas, Prabhakar Mandal
INTRODUCTION: Focal dermal hypoplasia (Goltz syndrome), is an extremely rare genetic disorder characterized by distinct skin manifestations and a wide range of abnormalities involving the ocular, dental, skeletal, urinary, gastrointestinal, cardiovascular, and central nervous systems. The objective of the present series is to emphasize the different typical as well as unusual features of this rare syndrome. METHOLOGY: This cross-sectional observational study was performed over a period of 8 years in a tertiary care hospital of Eastern India...
September 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28940616/skull-of-the-grey-heron-ardea-cinerea-detailed-investigation-of-the-orbital-region
#17
S V Bavdek, Z Golob, F Janžekovič, C S Rutland, V Kubale
The skull of the grey heron (Ardea cinerea) was examined with an emphasis on describing the orbital region. In the young (circa sixteen to seventeen days old) heron, the frontal bone (os frontale) and nasal bone (os nasale) comprised separate paired bones, connected by sutures (sutura interfrontalis, sutura internasalis and sutura frontonasalis plana). In adult animals, the relationship between these bones was different: the left and right frontal bone and the left and right nasal bone had grown together, and the frontal bone and nasal bone had fused into a common frontonasal bone (os frontonasale)...
September 20, 2017: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/28893970/has-respiratory-cryptosporidiosis-spread-to-black-grouse-tetrao-tetrix
#18
Nancy Parsons, Philip Warren, James Paul Duff, David Baines
Infection by Cryptosporidium baileyi was first confirmed in red grouse in northern England in 2010 and within three years spread to 48 per cent of moors. These form the last English stronghold for the rarer black grouse, and given the rapid spread of respiratory cryptosporidiosis among red grouse, concern has been expressed about possible infection. In 2010, the authors started screening black grouse for cryptosporidiosis in (1) dead birds taken for postmortem examination, (2) sample birds caught at night and (3) an observational study of birds attending leks...
September 11, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28868669/attributes-of-bio-oss-%C3%A2-and-moa-bone-%C3%A2-graft-materials-in-a-pilot-study-using-the-sheep-maxillary-sinus-model
#19
M M Smith, W J Duncan, D E Coates
BACKGROUND AND OBJECTIVE: The aim of this pilot study was to characterize surface morphology and to evaluate resorption and osseous healing of two deproteinated bovine bone graft materials after sinus grafting in a large animal model. MATERIAL AND METHODS: Surfaces of a novel particulate bovine bone graft, Moa-Bone(®) were compared with Bio-Oss(®) using scanning electron microscopy. Six sheep then had maxillary sinus grafting bilaterally, covered with BioGide(®) ...
September 4, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28844704/gallbladder-adenomyomatosis-diagnosis-and-management
#20
N Golse, M Lewin, A Rode, M Sebagh, J-Y Mabrut
Gallbladder (GB) adenomyomatosis (ADM) is a benign, acquired anomaly, characterized by hypertrophy of the mucosal epithelium that invaginates into the interstices of a thickened muscularis forming so-called Rokitansky-Aschoff sinuses. There are three forms of ADM: segmental, fundal and more rarely, diffuse. Etiology and pathogenesis are not well understood but chronic inflammation of the GB is a necessary precursor. Prevalence of ADM in cholecystectomy specimens is estimated between 1% and 9% with a balanced sex ratio; the incidence increases after the age of 50...
October 2017: Journal of Visceral Surgery
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