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Junctional Rhythm

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https://www.readbyqxmd.com/read/29299677/compression-of-a-giant-pseudomeningocele-causing-transient-anoxic-seizures-a-case-report
#1
Alhafidz Hamdan, A Saxena, G Rao, M Ivanov
Transient anoxic seizure upon application of pressure on a giant pseudomeningocele has never been reported in the literature; such abrupt changes in intracranial pressure due to large volume of cerebrospinal fluid (CSF) translocation, if left untreated may lead to permanent cerebral hypoxic injury and death. Here we describe a case of a 26-year-old woman who had undergone lumbar disc surgery in another unit few months ago and developed a large lump around her back. Any pressure on the lump resulted in headaches and at times episodes of seizures...
January 3, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29251799/atrioventricular-junction-ablation-in-patients-with-atrial-fibrillation-treated-with-cardiac-resynchronization-therapy-positive-impact-on-ventricular-arrhythmias-implantable-cardioverter-defibrillator-therapies-and-hospitalizations
#2
Maurizio Gasparini, Axel Kloppe, Maurizio Lunati, Frédéric Anselme, Maurizio Landolina, Jose Bautista Martinez-Ferrer, Alessandro Proclemer, Giovanni Morani, Mauro Biffi, Renato Ricci, Roberto Rordorf, Lorenza Mangoni, Laura Manotta, Andrea Grammatico, Francisco Leyva, Giuseppe Boriani
AIMS: We sought to determine whether atrioventricular junction ablation (AVJA) in patients with cardiac resynchronization therapy (CRT) implantable cardioverter-defibrillator (ICD) and with permanent atrial fibrillation (AF) has a positive impact on ICD shocks and hospitalizations compared with rate-slowing drugs. METHODS AND RESULTS: This is a pooled analysis of data from 179 international centres participating in two randomized trials and one prospective observational research...
December 18, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29234357/neonatal-arrhythmias-diagnosis-treatment-and-clinical-outcome
#3
REVIEW
Ji-Eun Ban
Arrhythmias in the neonatal period are not uncommon, and may occur in neonates with a normal heart or in those with structural heart disease. Neonatal arrhythmias are classified as either benign or nonbenign. Benign arrhythmias include sinus arrhythmia, premature atrial contraction, premature ventricular contraction, and junctional rhythm; these arrhythmias have no clinical significance and do not need therapy. Supraventricular tachycardia, ventricular tachycardia, atrioventricular conduction abnormalities, and genetic arrhythmia such as congenital long-QT syndrome are classified as nonbenign arrhythmias...
November 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/29172186/-neural-basis-for-producing-temporal-order
#4
Shigeru Kitazawa
It has been proposed that a position in time can be discriminated in two ways. First, each position is either past, present, or future (A series). Second, each position is either before or after another (B series). In this review, we aim to infer how the two series are represented in the brain on the basis of findings from clinical, neurophysiological, and neuroimaging studies. We suggest that the precuneus and posterior cingulate cortex are critically involved in the A series. In the B series, we suggest that a group of events are represented in space around the intraparietal cortex and are combined with the temporal directional cue provided by the motion signals in the left temporo-parietal junction...
November 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/29142075/cone-myoid-elongation-involves-unidirectional-microtubule-movement-mediated-by-dynein-1
#5
Tylor R Lewis, Mariusz Zareba, Brian A Link, Joseph C Besharse
Teleosts and amphibians exhibit retinomotor movements, morphological changes in photoreceptors regulated by light and circadian rhythms. Cone myoid elongation occurs during dark adaptation leading to the positioning of the cone outer segment closer to the retinal pigment epithelium. While it has been shown that microtubules are essential for cone myoid elongation, the underlying mechanism has not been established. In this work, we generated a transgenic line of zebrafish expressing a photoconvertible form of α-tubulin (tdEOS-tubulin) specifically in cone photoreceptors...
November 15, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29095320/transient-sick-sinus-syndrome-with-complete-atrioventricular-block-associated-with-ergonovine-intake-a-case-report
#6
Hui-Ting Wang, Wen-Hao Liu, Yung-Lung Chen
RATIONALE: More mature or older women are more likely to undergo in vitro fertilization and embryo implant. These women have a greater chance of receiving ergonovine therapy because of a suspected abortion. We present this case report to call attention to a latent lethal adverse effect in everyday obstetric practice using ergonovine. It requires more attention and close monitoring PATIENT CONCERNS:: We presented the case of a 38-year-old female patient with general weakness and mild chest tightness after ergonovine use...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29034606/do-mid-crown-enamel-formation-front-angles-reflect-factors-linked-to-the-pace-of-primate-growth-and-development
#7
Debbie Guatelli-Steinberg, James D Pampush, Mackie C O'Hara, Song Xing, W Scott McGraw, Rebecca J Ferrell
Enamel formation front (EFF) angles represent the leading edge of enamel matrix secretion at particular points in time. These angles are influenced by rates of enamel extension (the rates at which tooth crowns grow in height), rates of enamel matrix secretion and the angles that prisms make with the enamel-dentine junction. Previous research suggests, but has not yet established, that these angles reflect aspects of primate biology related to their pace of growth and development, most notably brain and body size...
October 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29031455/does-permanent-atrial-fibrillation-modify-response-to-cardiac-resynchronization-therapy-in-heart-failure-patients
#8
Ana Abreu, Mário Oliveira, Pedro Silva Cunha, Helena Santa Clara, Guilherme Portugal, Inês Gonçalves Rodrigues, Vanessa Santos, Luís Morais, Mafalda Selas, Rui Soares, Luísa Branco, Rui Ferreira, Miguel Mota Carmo
INTRODUCTION: The benefits of cardiac resynchronization therapy (CRT) documented in heart failure (HF) may be influenced by atrial fibrillation (AF). We aimed to compare CRT response in patients in AF and in sinus rhythm (SR). METHODS: We prospectively studied 101 HF patients treated by CRT. Rates of clinical, echocardiographic and functional response, baseline NYHA class and variation, left ventricular ejection fraction, volumes and mass, atrial volumes, cardiopulmonary exercise test (CPET) duration (CPET dur), peak oxygen consumption (VO2max) and ventilatory efficiency (VE/VCO2 slope) were compared between AF and SR patients, before and at three and six months after implantation of a CRT device...
October 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28955382/atrial-fibrillation-in-heart-failure-a-therapeutic-challenge-of-our-times
#9
REVIEW
Syeda Atiqa Batul, Rakesh Gopinathannair
Atrial fibrillation (AF) and heart failure (HF) are growing cardiovascular disease epidemics worldwide. There has been an exponential increase in the prevalence of AF and HF correlating with an increased burden of cardiac risk factors and improved survival rates in patients with structural heart disease. AF is associated with adverse prognostic outcomes in HF and is most evident in mild-to-moderate left ventricular (LV) dysfunction where the loss of "atrial kick" translates into poorer quality of life and increased mortality...
September 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/28916226/-accelerated-atrioventricular-junctional-rhythm
#10
Juan Ruiz-García, Luis Borrego-Bernabé, Irene Canal-Fontcuberta, Eduardo Alegría-Barrero
No abstract text is available yet for this article.
October 2017: Archivos de Cardiología de México
https://www.readbyqxmd.com/read/28874951/severe-hyperkalemia-can-the-electrocardiogram-risk-stratify-for-short-term-adverse-events
#11
Nicole Durfey, Brian Lehnhof, Andrew Bergeson, Shayla N M Durfey, Victoria Leytin, Kristina McAteer, Eric Schwam, Justin Valiquet
INTRODUCTION: The electrocardiogram (ECG) is often used to identify which hyperkalemic patients are at risk for adverse events. However, there is a paucity of evidence to support this practice. This study analyzes the association between specific hyperkalemic ECG abnormalities and the development of short-term adverse events in patients with severe hyperkalemia. METHODS: We collected records of all adult patients with potassium (K+) ≥6.5 mEq/L in the hospital laboratory database from August 15, 2010, through January 30, 2015...
August 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28858547/junctional-rhythm-preoperatively-and-during-general-anesthesia-for-oral-and-maxillofacial-surgery
#12
Naotaka Kishimoto, Ikue Kinoshita, Yoshihiro Momota
We report a case of junctional rhythm that occurred both preoperatively and later during a portion of general anesthesia. A 19-year-old woman was scheduled to undergo bilateral sagittal split ramus osteotomy after being diagnosed with a jaw deformity. Preoperative electrocardiography (ECG) revealed a junctional rhythm with a slow heart rate (HR). At 90 minutes after anesthesia induction, local anesthesia with 10 mL of 1% lidocaine and 1:100,000 adrenaline was administered. A junctional rhythm appeared 15 minutes after the local anesthesia...
2017: Anesthesia Progress
https://www.readbyqxmd.com/read/28839528/hemochromatosis-as-junctional-tachycardia-a-rare-presentation
#13
Ali Ghani, Irfan Ahsan, Charles Gottleib
We present here a 45-year-old male with no past medical problem who presented with palpitations. He was found to have supraventricular tachycardia intractable to medical therapy. Later his rhythm converted to junctional tachycardia. Further workup revealed hemochromatosis to be primary etiology causing the arrhythmia. The low index of suspicion for additional workup is key to diagnosis and successful outcome.
June 7, 2017: Clinics and Practice
https://www.readbyqxmd.com/read/28838549/arrhythmias-involving-the-atrioventricular-junction
#14
REVIEW
Luigi Di Biase, Carola Gianni, Giuseppe Bagliani, Luigi Padeletti
The atrioventricular junction has a central role in electrophysiology, responsible for reentrant and automatic forms of supraventricular tachycardia. During atrioventricular nodal reentry tachycardia, the circuit involves 2 electrophysiologically separate pathways located in the vicinity of the atrioventricular node. Atrioventricular reentry tachycardia is caused by the presence of an accessory pathway located almost anywhere along the atrioventricular groove; the macroreentrant circuit involves the atrioventricular node, the accessory pathway and necessarily portions of atria and ventricles...
September 2017: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/28790885/revisiting-the-neural-basis-of-acquired-amusia-lesion-patterns-and-structural-changes-underlying-amusia-recovery
#15
Aleksi J Sihvonen, Pablo Ripollés, Antoni Rodríguez-Fornells, Seppo Soinila, Teppo Särkämö
Although, acquired amusia is a common deficit following stroke, relatively little is still known about its precise neural basis, let alone to its recovery. Recently, we performed a voxel-based lesion-symptom mapping (VLSM) and morphometry (VBM) study which revealed a right lateralized lesion pattern, and longitudinal gray matter volume (GMV) and white matter volume (WMV) changes that were specifically associated with acquired amusia after stroke. In the present study, using a larger sample of stroke patients (N = 90), we aimed to replicate and extend the previous structural findings as well as to determine the lesion patterns and volumetric changes associated with amusia recovery...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28671548/motoneurons-regulate-the-central-pattern-generator-during-drug-induced-locomotor-like-activity-in-the-neonatal-mouse
#16
Melanie Falgairolle, Joshua G Puhl, Avinash Pujala, Wenfang Liu, Michael J O'Donovan
Motoneurons are traditionally viewed as the output of the spinal cord that do not influence locomotor rhythmogenesis. We assessed the role of motoneuron firing during ongoing locomotor-like activity in neonatal mice expressing archaerhopsin-3 (Arch), halorhodopsin (eNpHR), or channelrhodopsin-2 (ChR2) in Choline acetyltransferase neurons (ChAT(+)) or Arch in LIM-homeodomain transcription factor Isl1(+) neurons. Illumination of the lumbar cord in mice expressing eNpHR or Arch in ChAT(+) or Isl1(+) neurons, depressed motoneuron discharge, transiently decreased the frequency, and perturbed the phasing of the locomotor-like rhythm...
July 3, 2017: ELife
https://www.readbyqxmd.com/read/28666343/intraoperative-arrhythmias-in-children-with-congenital-heart-disease-transient-innocent-events
#17
Charlotte A Houck, Tanwier T T K Ramdjan, Ameeta Yaksh, Christophe P Teuwen, Eva A H Lanters, Ad J J C Bogers, Natasja M S de Groot
Aims: The significance and incidences of intraoperative arrhythmias occurring in the operating room (OR) in children with congenital heart disease (CHD) are unknown. Aims of this study were to determine incidences of intraoperative arrhythmias in children with CHD and to examine whether they are associated with persistent arrhythmias during follow-up. Methods and results: Continuous ECG recordings obtained from 134 consecutive paediatric CHD patients were manually examined from the moment the aortic cross-clamp (ACC) was removed [use of ACC and cardiopulmonary bypass (CPB)], when CPB was stopped (use of only CPB) or when the sternum was closed (no use of ACC and CPB) until departure from the OR...
June 28, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28658116/an-interesting-implantable-cardioverter-defibrillator-treatment-for-lethal-ventricular-arrhythmias-caused-by-coronary-artery-spasm-a-case-report
#18
Jie Sun, Li Feng, Fei Li, Yanchun Zhang, Jianting Dong
RATIONALE: Coronary artery spasm (CAS) could cause serious lethal ventricular arrhythmias. While implantable cardioverter defibrillators (ICDs) have been recommend for secondary prevention of sudden cardiac death related to lethal ventricular arrhythmias. However, in resuscitated sudden cardiac death caused by CAS, the effect of ICD is still not well clear. PATIENT CONCERNS: A 60-year-old male presented with 2 episodes of syncope. Coronary angiography showed normal coronary arteries...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28576728/cellular-circadian-oscillators-in-the-suprachiasmatic-nucleus-remain-coupled-in-the-absence-of-connexin-36
#19
Tanja Diemer, Dominic Landgraf, Takako Noguchi, Haiyun Pan, Jose L Moreno, David K Welsh
In mammals, the master circadian clock resides in the suprachiasmatic nucleus (SCN). The SCN is characterized by robust circadian oscillations of clock gene expression and neuronal firing. The synchronization of circadian oscillations among individual cells in the SCN is attributed to intercellular coupling. Previous studies have shown that gap junctions, specifically those composed of connexin-36 (Cx36) subunits, are required for coupling of electrical firing among SCN neurons at a time scale of milliseconds...
August 15, 2017: Neuroscience
https://www.readbyqxmd.com/read/28503133/behavioral-senescence-and-aging-related-changes-in-motor-neurons-and-brain-neuromodulator-levels-are-ameliorated-by-lifespan-extending-reproductive-dormancy-in-drosophila
#20
Sifang Liao, Susan Broughton, Dick R Nässel
The lifespan of Drosophilamelanogaster can be extended substantially by inducing reproductive dormancy (also known as diapause) by lowered temperature and short days. This increase of longevity is accompanied by lowered metabolism and increased stress tolerance. We ask here whether behavioral senescence is ameliorated during adult dormancy. To study this we kept flies for seven or more weeks in normal rearing conditions or in diapause conditions and compared to 1-week-old flies in different behavioral assays of sleep, negative geotaxis and exploratory walking...
2017: Frontiers in Cellular Neuroscience
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