48 results match your criteria adjacent crista


Dural arteriovenous fistula with crista galli erosion in a patient with suspected sinusitis.

Radiol Case Rep 2021 May 25;16(5):1028-1031. Epub 2021 Feb 25.

Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan.

Dural arteriovenous fistula (dAVF) of the anterior cranial fossa is an aggressive entity with a high risk of intracranial hemorrhage. A 38-year-old woman presented to our institution with nasal obstruction and discharge. Computed tomography (CT) scans performed for suspected sinusitis revealed erosion of the crista galli predominantly on the left side. Read More

View Article and Full-Text PDF

Benign Structures Mimicking Right Atrial Masses on Prenatal Ultrasound.

Case Rep Pediatr 2021 12;2021:8889941. Epub 2021 Jan 12.

Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, USA.

Advances in imaging have resulted in more frequent reporting of primitive right atrial structures which can sometimes mimic cardiac tumors in prenatal ultrasound. Prominent crista terminalis and Chiari network are examples of these structures. We describe two cases of pregnant women referred to the fetal cardiology clinic for fetal echocardiography for right atrial masses seen on prenatal ultrasound suspicious of tuberous sclerosis. Read More

View Article and Full-Text PDF
January 2021

Ultrahigh resolution electroanatomical mapping of the transverse conduction of the right atrial posterior wall in cases with and without typical atrial flutter.

J Cardiovasc Electrophysiol 2021 Feb 29;32(2):297-304. Epub 2020 Dec 29.

Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan.

Introduction: The right atrial posterior wall (RAPW) is known to form a conduction barrier during typical atrial flutter (AFL). We evaluated the transverse conduction properties of RAPW in patients with and without typical AFL using an ultrahigh resolution electroanatomical mapping system.

Methods And Results: This study included 41 patients who underwent catheter ablation of AF, typical or atypical AFL, in whom we performed RAPW mapping with an ultrahigh resolution mapping system during typical AFL and coronary sinus ostial pacing with three different pacing cycle lengths (PCLs) (1) PCL1: PCL within 40 ms of the AFL cycle length in patients with typical AFL or 250-300 ms for those without, (2) PCL2: 400 ms, (3) PCL3: PCL just faster than the sinus rate. Read More

View Article and Full-Text PDF
February 2021

Interaction with ectopic cochlear crista sensory epithelium disrupts basal cochlear sensory epithelium development in Lmx1a mutant mice.

Cell Tissue Res 2020 Jun 13;380(3):435-448. Epub 2020 Jan 13.

Department of Biology, University of Iowa, Iowa City, IA, 52242-1324, USA.

The LIM homeodomain transcription factor Lmx1a shows a dynamic expression in the developing mouse ear that stabilizes in the non-sensory epithelium. Previous work showed that Lmx1a functional null mutants have an additional sensory hair cell patch in the posterior wall of a cochlear duct and have a mix of vestibular and cochlear hair cells in the basal cochlear sensory epithelium. In E13. Read More

View Article and Full-Text PDF

An undescribed venous pathway intervening between the olfactory fossa and nasal vestibule.

Surg Radiol Anat 2019 May 19;41(5):485-490. Epub 2019 Feb 19.

Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1, Urayasu, Chiba, 279-0021, Japan.

Purpose: A curvilinear pathway intervening between the olfactory fossa and nasal vestibule has not been well documented. Therefore, the aim of this study was to examine its structure using magnetic resonance imaging (MRI).

Methods: In total, 84 patients underwent thin-sliced, contrast MRI. Read More

View Article and Full-Text PDF

Mitochondrial contact site and cristae organizing system.

Curr Opin Cell Biol 2016 08 7;41:33-42. Epub 2016 Apr 7.

Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; BIOSS Centre for Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany. Electronic address:

Mitochondria possess two membranes of different architecture. The outer membrane surrounds the organelle, whereas the inner membrane consists of two domains. The inner boundary membrane that is adjacent to the outer membrane harbors many protein translocases. Read More

View Article and Full-Text PDF

When is a mass not a mass? An unusual presentation of prominent crista terminalis.

BMJ Case Rep 2016 Feb 15;2016. Epub 2016 Feb 15.

Department of Cardiology, George Eliot Hospital, Nuneaton, UK.

This case report describes a patient in whom echocardiography showed borderline left ventricular hypertrophy and a mass adjacent to the right atrial wall. This naturally caused some concern as the differential diagnoses included that of a right atrial myxoma and further investigations were organised. A subsequent cardiac MRI revealed this thickening to be a prominent crista terminalis. Read More

View Article and Full-Text PDF
February 2016

Endoscopic resection of a mucocele of the crista galli.

Ear Nose Throat J 2015 Sep;94(9):E23-5

Department of Ear, Nose and Throat Surgery, Imperial College Healthcare NHS Trust, St. Mary's Hospital, Praed St., London W2 1NY, UK.

Mucoceles expand by the process of bone resorption and new bone formation, which leads to local destruction and displacement of adjacent structures. We present the case of a 47-year-old woman who presented with recurrent headaches, nausea, and vomiting, all of which were believed to have occurred secondary to a mucocele of the crista galli. To the best of our knowledge, only 1 similar case has been previously reported in the world literature; in that case, the crista galli was drained externally. Read More

View Article and Full-Text PDF
September 2015

Successful radiofrequency catheter ablation of sinoatrial nodal reentrant tachycardia after a total cavo-pulmonary connection procedure with an extra-cardiac conduit.

J Cardiol Cases 2015 Sep 30;12(3):94-97. Epub 2015 Jun 30.

Division of Cardiology of Tenri Hospital, Nara, Japan.

We report a tachyarrhythmia case of a 32-year-old female with a single ventricle and heterotaxy syndrome. She had surgery involving a total cavo-pulmonary connection procedure using an extra-cardiac conduit (EC) at the age of 17 years. A tachycardia was repetitively induced with single atrial extrastimuli. Read More

View Article and Full-Text PDF
September 2015

Pharmacologically distinct nicotinic acetylcholine receptors drive efferent-mediated excitation in calyx-bearing vestibular afferents.

J Neurosci 2015 Feb;35(8):3625-43

Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, Illinois 60612.

Electrical stimulation of vestibular efferent neurons rapidly excites the resting discharge of calyx/dimorphic (CD) afferents. In turtle, this excitation arises when acetylcholine (ACh), released from efferent terminals, directly depolarizes calyceal endings by activating nicotinic ACh receptors (nAChRs). Although molecular biological data from the peripheral vestibular system implicate most of the known nAChR subunits, specific information about those contributing to efferent-mediated excitation of CD afferents is lacking. Read More

View Article and Full-Text PDF
February 2015

Structural contributions to fibrillatory rotors in a patient-derived computational model of the atria.

Europace 2014 Nov;16 Suppl 4:iv3-iv10

Department of Bioengineering, University of California San Diego, Mail Code 0412, 9500 Gilman Drive, La Jolla, CA 92093-0412, USA Department of Medicine, University of California San Diego, La Jolla, CA, USA Cardiac Biomedical Science and Engineering Center, University of California San Diego, CA, USA

Aims: The aim of this study was to investigate structural contributions to the maintenance of rotors in human atrial fibrillation (AF) and possible mechanisms of termination.

Methods And Results: A three-dimensional human biatrial finite element model based on patient-derived computed tomography and arrhythmia observed at electrophysiology study was used to study AF. With normal physiological electrical conductivity and effective refractory periods (ERPs), wave break failed to sustain reentrant activity or electrical rotors. Read More

View Article and Full-Text PDF
November 2014

Application of ultrasonic bone curette in endoscopic endonasal skull base surgery: technical note.

J Neurol Surg B Skull Base 2014 Apr 17;75(2):90-5. Epub 2014 Feb 17.

Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States.

Background Endoscopic endonasal surgery (EES) of the skull base often requires extensive bone work in proximity to critical neurovascular structures. Objective To demonstrate the application of an ultrasonic bone curette during EES. Methods Ten patients with skull base lesions underwent EES from September 2011 to April 2012 at the University of Pittsburgh Medical Center. Read More

View Article and Full-Text PDF

A subset of chicken statoacoustic ganglion neurites are repelled by Slit1 and Slit2.

Hear Res 2014 Apr 21;310:1-12. Epub 2014 Jan 21.

Department of Biological Sciences and Purdue University Center for Cancer Research, Purdue University, 915 W State St., West Lafayette, IN 47907-1392, USA. Electronic address:

Mechanosensory hair cells in the chicken inner ear are innervated by bipolar afferent neurons of the statoacoustic ganglion (SAG). During development, individual SAG neurons project their peripheral process to only one of eight distinct sensory organs. These neuronal subtypes may respond differently to guidance cues as they explore the periphery in search of their target. Read More

View Article and Full-Text PDF

Right atrial appendage and vestibule: further anatomical insights with implications for invasive electrophysiology.

Europace 2013 May 23;15(5):728-34. Epub 2012 Nov 23.

Cardiac Morphology Unit, Department of Paediatrics, Royal Brompton Hospital, London, UK.

Aims: Despite recognition that understanding gross anatomy of the right atrium is important in the era of invasive electrophysiology, areas such as the right atrial appendage (RAA) wall or the vestibule are not fully appreciated. The aim of this study was to conduct an anatomical assessment focusing on these structures to gain further insights into electrophysiological procedures.

Methods: Forty-four normal human hearts were examined macro- and microscopically. Read More

View Article and Full-Text PDF

An image-based model of atrial muscular architecture: effects of structural anisotropy on electrical activation.

Circ Arrhythm Electrophysiol 2012 Apr 14;5(2):361-70. Epub 2012 Mar 14.

Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.

Background: Computer models that capture key features of the heterogeneous myofiber architecture of right and left atria and interatrial septum provide a means of investigating the mechanisms responsible for atrial arrhythmia. The data necessary to implement such models have not previously been available. The aims of this study were to characterize surface geometry and myofiber architecture throughout the atrial chambers and to investigate the effects of this structure on atrial activation. Read More

View Article and Full-Text PDF

Role of MINOS in mitochondrial membrane architecture and biogenesis.

Trends Cell Biol 2012 Apr 2;22(4):185-92. Epub 2012 Mar 2.

Institut für Biochemie und Molekularbiologie, Zentrum für Biochemie und Molekulare Zellforschung, Universität Freiburg, 79104 Freiburg, Germany.

Mitochondria possess a complex architecture with two membranes. The inner membrane is divided into two domains: the inner boundary membrane, which is adjacent to the outer membrane, and membrane invaginations termed cristae. Both domains are connected by tubular openings, the crista junctions. Read More

View Article and Full-Text PDF

Mechanical filtering for narrow-band hearing in the weta.

J Exp Biol 2011 Mar;214(Pt 5):778-85

University of Auckland, School of Biological Sciences, Auckland, New Zealand.

This paper constitutes a major attempt to associate tympanic deflections with the mechanoreceptor organ location in an acoustic insect. The New Zealand tree weta (Hemideina thoracica) has tympanal ears located on each of the prothoracic tibiae. The tympana exhibit a sclerotized oval plate, membranous processes bulging out from the tibial cuticle and many loosely suspended ripples. Read More

View Article and Full-Text PDF

Atrial tachycardias adjacent to the phrenic nerve: recognition, potential problems, and solutions.

Heart Rhythm 2009 Aug 2;6(8):1186-91. Epub 2009 Apr 2.

Cardiac Arrhythmia Service, Cardiovascular Division, Brigham & Women's Hospital, Boston, Massachusetts 02115, USA.

Background: Ablation of atrial tachycardias (AT) arising from the crista terminalis region (CT) can be complicated by phrenic nerve (PN) injury.

Objective: This study sought to describe epicardial protection techniques to prevent PN injury from endocardial ablation of AT.

Methods: Ablation was attempted in 4 patients with focal AT arising from the CT in whom conventional endocardial ablation was limited by PN proximity identified by capture during pacing. Read More

View Article and Full-Text PDF

[Slow activated voltage-dependent sodium current contribution in fast depolarization in the rabbit heart true pacemaker sinoatrial node].

Authors:
V A Golovko

Ross Fiziol Zh Im I M Sechenova 2009 Apr;95(4):387-97

The functional role of INa in initiation and conduction of cardiac true pacemaker activity remains uncertain. Therefore the goal of this work was to study the effects of Na+ substitution of action potentials parameters of the sinoatrial area cells. Transmembrane action potentials were recorded with 15 to 40 MOmega glass microelectrodes filled with 2. Read More

View Article and Full-Text PDF

Safety and efficacy of cryoablation of atrial tachycardia with high risk of ablation-related injuries.

Europace 2009 May 26;11(5):625-9. Epub 2009 Jan 26.

Department of Cardiology, Karolinska Institute, Karolinska University Hospital, S-141 86 Stockholm, Sweden.

Aims: The purpose of this study was to evaluate the safety and efficacy of cryoablation as an alternative to radio frequency (RF) ablation in high-risk-located atrial tachycardia (AT).

Methods And Results: Between 2004 and 2007, 164 patients underwent catheter ablation due to AT at our institution. Twenty-six of these patients (22 women and 4 men), median age 58 years (range 14-76), were considered having high-risk-located AT and were treated by cryoablation. Read More

View Article and Full-Text PDF

Crista galli pneumatization is an extension of the adjacent frontal sinuses.

AJNR Am J Neuroradiol 2009 Jan 3;30(1):31-3. Epub 2008 Sep 3.

Department of Radiology, Mount Sinai School of Medicine of New York University, New York, NY 10029, USA.

Background And Purpose: The crista galli is part of the ethmoid bone and, as such, it could be expected that aeration of the crista would come from ethmoid cells. After observing crista pneumatization from the frontal sinuses in several cases, we undertook this study to establish how often crista galli pneumatization came from the frontal sinuses rather than from the ethmoid complex.

Materials And Methods: Two hundred consecutive CT scans of the paranasal sinuses were studied in adult patients to obtain the incidence of crista galli pneumatization and the cell of origin for this phenomenon. Read More

View Article and Full-Text PDF
January 2009

Is there a reason for performing frontal sinus trephination at 1 cm from midline? A tomographic study.

Braz J Otorhinolaryngol 2006 Jul-Aug;72(4):505-7

Porto Alegre University Hospital, Otorhinolaryngology, Department, RS, Brazil.

Unlabelled: The complex anatomy of the frontoethmoidal recess, as well as its anatomical relationship with the vital adjacent structures in the region explain the reason for considerable surgical care to protect these structures and minimize complications related to healing. Trephination is an accepted procedure to access the frontal sinus.

Aim: Discuss the best location for performing frontal sinus trephination. Read More

View Article and Full-Text PDF

Usefulness of the polarity in high-density wide range-filtered bipolar mapping to detect isthmus block during radiofrequency ablation of typical atrial flutter.

J Interv Card Electrophysiol 2006 Mar;15(2):93-102

Division of Cardiology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-Kamimachi, Tokyo, Japan.

Background: The atrial activation sequence around the tricuspid annulus (TA) cannot always be used to establish whether complete block has been achieved across the cavotricuspid isthmus (CTI) during radiofrequency ablation (RFCA) for typical counterclockwise atrial flutter (CCW-AFL).

Aim: We examined whether a change in the polarity of the atrial high-density wide range-filtered bipolar electrograms recorded near the ablation line is an accurate indicator of complete CTI block.

Methods: Nineteen patients with CCW-AFL underwent RFCA. Read More

View Article and Full-Text PDF

Max brödel: illustrating healed valve ring abscesses.

Arch Pathol Lab Med 2005 Sep;129(9):1155-8

Department of Neurology, Washington University Medical Center, St Louis, MO 63110, USA.

A 14-year-old adolescent girl presented with severe congestive heart failure, progressive throughout 3 months. A precordial thrill, machinery-like murmur, and right bundle branch block were noted. Death occurred despite digitalis and diuretic therapy and removal of pleural and ascitic fluid. Read More

View Article and Full-Text PDF
September 2005

Vestibular cytotoxicity in gentamicin-treated frogs: a preliminary report.

Am J Otolaryngol 2005 Mar-Apr;26(2):91-5

Department of Otoalaryngology-Head and Neck Surgery, University of Illinois at Chicago, 60612, USA.

Objective: The aim of this study is to determine the immediate effects of intraperitoneal doses of gentamicin (GM) which would result in variable degrees of destruction of crista ampullary hair cells of frogs. This information will serve as a baseline guide to cell regeneration experiments on the damaged vestibular sense organ.

Study Design: The American bullfrog was administered daily intraperitoneal doses of 50, 100, 150, and 200 mg/kg of GM for 7 days. Read More

View Article and Full-Text PDF

Relationship between anatomic location of the crista terminalis and double potentials recorded during atrial flutter: intracardiac echocardiographic analysis.

J Cardiovasc Electrophysiol 2004 Dec;15(12):1426-32

Division of Cardiovascular Disease, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.

Introduction: The activation sequence in typical atrial flutter (AFL) around the tricuspid annulus is well described. However, activation of the remainder of the right atrium (RA) is not well defined. Previous studies have shown a linear block at the crista terminalis (CT) during AFL. Read More

View Article and Full-Text PDF
December 2004

The development of semicircular canals in the inner ear: role of FGFs in sensory cristae.

Development 2004 Sep 27;131(17):4201-11. Epub 2004 Jul 27.

National Institute on Deafness and Other Communication Disorders, Rockville, MD 20850, USA.

In the vertebrate inner ear, the ability to detect angular head movements lies in the three semicircular canals and their sensory tissues, the cristae. The molecular mechanisms underlying the formation of the three canals are largely unknown. Malformations of this vestibular apparatus found in zebrafish and mice usually involve both canals and cristae. Read More

View Article and Full-Text PDF
September 2004

Pericaval and periannular intra-atrial reentrant tachycardias in patients with congenital heart disease.

J Cardiovasc Electrophysiol 2003 Feb;14(2):119-25

Department of Cardiology, Boston Children's Hospital, Boston, Massachusetts 02115, USA.

Introduction: Intra-atrial reentrant tachycardia (IART) is a frequent late sequel of congenital heart surgery, often involving the cavotricuspid isthmus. In this report, we characterize pericaval reentry, a novel mechanism of isthmus-dependent IART in congenital heart patients, and compare its electrophysiologic characteristics with periannular atrial flutter.

Methods And Results: Electrophysiologic and electroanatomic mapping data and acute outcomes were reviewed in postoperative patients with congenital heart disease who underwent electrophysiologic study/radiofrequency catheter ablation at The Children's Hospital, Boston between January 1999 and November 2000. Read More

View Article and Full-Text PDF
February 2003

A mouse model of severe acute pancreatitis induced with caerulein and lipopolysaccharide.

World J Gastroenterol 2003 Mar;9(3):584-9

Department of Lymphology, Department of Histology and Embryology, Medical College of Zhejiang University, Hangzhou 310031, Zhejiang Province, China.

Aim: To establish a non-traumatic, easy to induce and reproducible mouse model of severe acute pancreatitis (SAP) induced with caerulein and lipopolyasccharide (LPS).

Methods: Thirty-two healthy mature NIH female mice were selected and divided at random into four groups (each of 8 mice), i.e. Read More

View Article and Full-Text PDF

Echocardiographic lesion characteristics associated with successful ablation of inappropriate sinus tachycardia.

J Cardiovasc Electrophysiol 2001 Jul;12(7):814-8

Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, USA.

Introduction: Catheter ablation of inappropriate sinus tachycardia has proven difficult. Despite the use of intracardiac echocardiography to help direct radiofrequency (RF) application to the anatomic target of the superolateral crista terminalis (CT), multiple RF lesions often are required. Furthermore, the characteristic echo-anatomic changes with RF application associated with a reduction in heart rate have not been defined. Read More

View Article and Full-Text PDF