keyword
MENU ▼
Read by QxMD icon Read
search

Atrial- Ventricular block

keyword
https://www.readbyqxmd.com/read/29758405/accelerometer-based-av-synchronous-pacing-with-a-ventricular-leadless-pacemaker-results-from-the-micra-av-feasibility-studies
#1
Larry Chinitz, Philippe Ritter, Surinder Kaur Khelae, Saverio Iacopino, Christophe Garweg, Maria Grazia-Bongiorni, Petr Neuzil, Jens Brock Johansen, Lluis Mont, Efrain Gonzalez, Venkata Sagi, Gabor Z Duray, Nicolas Clementy, Todd Sheldon, Vincent Splett, Kurt Stromberg, Nicole Wood, Clemens Steinwender
BACKGROUND: Micra is a leadless pacemaker that is implanted in the right ventricle and provides rate response via a 3-axis accelerometer (ACC). Custom software was developed to detect atrial contraction using the ACC enabling AV synchronous pacing. OBJECTIVE: To sense atrial contractions from the Micra ACC signal and provide AV synchronous pacing. METHODS: The MASS/MASS2 early feasibility studies showed intracardiac accelerations related to atrial contraction can be measured via ACC in the Micra leadless pacemaker...
May 8, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29739637/adverse-effects-of-left-ventricular-electrical-dyssynchrony-on-cardiac-reverse-remodeling-and-prognosis-after-aortic-valve-surgery
#2
Soo Youn Lee, Chi Young Shim, Geu-Ru Hong, In Jeong Cho, Seng Chan You, Hyuk-Jae Chang, Jong-Won Ha, Namsik Chung
BACKGROUND: Electrical dyssynchrony (ED) is one of the important contributing mechanisms in the progression of heart failure. We hypothesized that ED would interfere with cardiac reverse remodeling and affect prognosis after aortic valve surgery. METHODS: A total of 411 consecutive patients (233 males, mean age 65±11 years) who underwent aortic valve surgery were retrospectively analyzed. The patients were divided into two groups according to the presence of ED [Group 1: no ED (n=382, 93%), Group 2: ED (n=29, 7%)]...
May 5, 2018: Journal of Cardiology
https://www.readbyqxmd.com/read/29686877/how-to-manage-various-arrhythmias-and-sudden-cardiac-death-in-the-cardiovascular-intensive-care
#3
REVIEW
Yoshinori Kobayashi
In the clinical practice of cardiovascular critical care, we often observe a variety of arrhythmias in the patients either with (secondary) or without (idiopathic) underlying heart diseases. In this manuscript, the clinical background and management of various arrhythmias treated in the CCU/ICU will be reviewed. The mechanism and background of lethal ventricular tachyarrhythmias vary as time elapses after the onset of MI that should be carefully considered to select a most suitable therapy. In the category of non-ischemic cardiomyopathy, several diseases are known to be complicated by the various ventricular tachyarrhythmias with some specific mechanisms...
2018: Journal of Intensive Care
https://www.readbyqxmd.com/read/29673006/electro-vectorcardiographic-demonstration-of-bifascicular-block-associated-with-ventricular-preexcitation
#4
Andrés R Pérez-Riera, Raimundo Barbosa-Barros, Rodrigo Daminello-Raimundo, Luiz Carlos de Abreu, Kjell Nikus
Down syndrome occurs more frequently in the offsprings of older pregnant women and may be associated with atrioventricular septal defect. This refers to a broad spectrum of malformations characterized by a deficiency of the atrioventricular septum and abnormalities of the atrioventricular valves caused by an abnormal fusion of the superior and inferior endocardial cushions with the midportion of the atrial septum and the muscular portion of the ventricular septum.
April 19, 2018: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29652656/electrocardiogram-abnormalities-related-to-anti-malarials-in-systemic-lupus-erythematosus
#5
Taneisha K McGhie, Paula Harvey, Jiandong Su, Nicole Anderson, George Tomlinson, Zahi Touma
OBJECTIVES: Cardiotoxicity with potential conduction/structural abnormalities on electrocardiogram (ECG) have been reported with anti-malarial (AM). We aimed to study whether cumulative AM is associated with ECG abnormalities. METHODS: A standard resting supine ECG was performed on consecutive patients attending the Lupus Clinic since 2012. ECG abnormalities were grouped into structural [left ventricular hypertrophy or atrial enlargement] and conduction abnormalities [prolonged corrected QT interval (QTc), short PR interval, left bundle branch block (LBBB), right bundle branch block (RBBB) and atrioventricular block (AVB), bradycardia, tachycardia, premature atrial complex, ectopic atrial rhythm, atrial fibrillation, premature ventricular complex and ventricular bigeminy]...
April 13, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29644942/postnatal-undernutrition-in-mice-causes-cardiac-arrhythmogenesis-which-is-exacerbated-when-pharmacologically-stressed
#6
J R Visker, D P Ferguson
Growth restriction caused by postnatal undernutrition increases risk for cardiovascular disease in adulthood with the potential to induce arrhythmogenesis. Thus, the purpose was to determine if undernutrition during development produced arrhythmias at rest and when stressed with dobutamine in adulthood. Mouse dams were fed (CON: 20% protein), or low-protein (LP: 8%) diet before mating. A cross-fostering model was used where pups nursed by dams fed LP diet in early [EUN; postnatal day (PN) 1-10], late (LUN; PN11-21) and whole (PUN; 1-21) phases of postnatal life...
April 12, 2018: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/29628444/ph-domain-leucine-rich-repeat-protein-phosphatase-2-phlpp2-regulates-g-protein-coupled-receptor-kinase-5-grk5-induced-cardiac-hypertrophy-in-vitro
#7
Szu-Tsen Yeh, Cristina M Zambrano, Walter J Koch, Nicole H Purcell
PH domain leucine-rich repeat protein phosphatase (PHLPP) is a serine/threonine phosphatase that has been shown to regulate cell growth and survival through dephosphorylation of several members of the AGC family of kinases. G-protein coupled receptor kinase 5 (GRK5) is an AGC kinase that regulates phenylephrine (PE) induced cardiac hypertrophy through its non-canonical function of directly targeting proteins to the nucleus to regulate transcription. Here we investigated the possibility that the PHLPP2 isoform can regulate GRK5 induced cardiomyocyte hypertrophy in neonatal rat ventricular myocytes (NRVMs)...
April 8, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29625102/tricuspid-valve-detachment-in-ventricular-septal-defect-closure-does-not-impact-valve-function
#8
Charles D Fraser, Xun Zhou, Sandeep Palepu, Cecillia Lui, Alejandro Suarez-Pierre, Todd C Crawford, J Trent Magruder, Marshall L Jacobs, Duke E Cameron, Naru Hibino, Luca A Vricella
BACKGROUND: Although tricuspid valve detachment (TVD) facilitates improved exposure during trans-atrial ventricular septal defect (VSD) closure, few have analyzed the impact of TVD on long-term valve durability. METHODS: Pediatric patients undergoing VSD closure at our institution from 1997 to 2013 were identified, and charts were retrospectively reviewed. Patients were separated into groups based on utilization of TVD. Propensity score matching was then performed using a non-parsimonious logistic regression model involving 7 variables...
April 3, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29610591/does-phantom-tumor-really-exist
#9
Dan-Nicolae Tesloianu, Mihaela Chioarta, Dana Corduneanu, Andreea-Mihaela Ignat, Antoniu Octavian Petris, Anda Tesloianu
Localized interlobar effusion in congestive heart failure (known as phantom tumor or vanishing tumor of the lung) is an uncommon entity. We report a case of a 61-year-old man who presented to the Emergency Departament with a two week history of dyspnoea, palpitations, dry cough and intermitent anterior chest pain. A posteroanterior chest radiography showed a nodular mass in the medium third of the right hemithorax suggestive of a pulmonary tumor. With this supposition of diagnosis, the patient was admitted to the Pneumology Departament for further investigations...
December 2017: Mædica
https://www.readbyqxmd.com/read/29570208/sheep-can-be-used-as-animal-model-of-regional-myocardial-remodelling-and-controllable-work
#10
Jürgen Duchenne, Piet Claus, Efstathios D Pagourelias, Razvan O Mada, Joeri Van Puyvelde, Kathleen Vunckx, Eric Verbeken, Olivier Gheysens, Filip Rega, Jens-Uwe Voigt
BACKGROUND: A-V-sequential pacing has been shown to induce reversible conduction delay and subsequent asymmetric remodelling of the left ventricle (LV) in dogs and pigs. Both species have disadvantages in animal experiments. Therefore aim of this study focusses at developing a more feasible and easy-to-use animal model in sheep. METHODS: Dual-chamber pacing (DDD) pacemakers (right atrium + right ventricular free wall) were surgically implanted in 13 sheep. All animals underwent 8 weeks of chronic rapid pacing at 180 bpm...
March 23, 2018: Cardiology Journal
https://www.readbyqxmd.com/read/29538207/case-report-an-unstable-wide-qrs-complexes-tachycardia-after-ablation-of-a-poster-septal-accessory-pathway-what-is-the-mechanism
#11
Huan Wang, Xiaoru Che
INTRODUCTION: Differentiation of wide QRS complex tachycardia required repeated electrophysiological stimuli and mapping. However, instability of tachycardia would increase the difficulty in differential diagnosis. SYMPTOMS AND CLINICAL FINDINGS: In this paper, we reported a wide QRS tachycardia following ablation of an atrioventricular reentrant tachycardia participated by a poster-septal accessory pathway. Limited differentiation strategy was performed because the wide QRS tachycardia was self-limited and with unstable hemodynamics...
March 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29531385/-the-pacemaker-and-implantable-cardioverter-defibrillator-registry-of-the-italian-association-of-arrhythmology-and-cardiac-pacing-annual-report-2016
#12
Alessandro Proclemer, Massimo Zecchin, Antonio D'Onofrio, Giuseppe Boriani, Domenico Facchin, Luca Rebellato, Marco Ghidina, Giulia Bianco, Emanuela Bernardelli, Elsa Pucher, Dario Gregori
BACKGROUND: The pacemaker (PM) and implantable cardioverter-defibrillator (ICD) registry of the Italian Association of Arrhythmology and Cardiac Pacing (AIAC) monitors the main epidemiological data in real-world practice. The survey for the 2016 activity collects information about demographics, clinical characteristics, main indications for PM/ICD therapy and device types from the Italian collaborating centers. METHODS: The registry collects prospectively national PM and ICD implantation activity on the basis of European cards...
February 2018: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/29525386/cardiac-resynchronization-therapy-with-his-bundle-pacing-as-a-method-of-treatment-of-chronic-heart-failure-in-patients-with-permanent-atrial-fibrillation-and-left-bundle-branch-block
#13
Krzysztof Boczar, Agnieszka Sławuta, Andrzej Ząbek, Maciej Dębski, Jacek Gajek, Jacek Lelakowski, Barbara Małecka
CRT is a therapeutic option for patients with heart failure, sinus rhythm, prolonged QRS complex duration and reduced ejection fraction. We present a case of 71-year-old woman with dilated cardiomyopathy, NYHA functional class III and AF. We implanted CRT combined with direct His-bundle pacing. The indication for such a therapy was a left bundle branch block with a QRS complex of 178ms and a left ventricular EF of 15%, left ventricular end-diastolic diameter (LVEDD) of 75mm. After 8months of follow-up the LVEDD was 60mm with EF 35-40%...
March 2, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29523425/inadvertent-left-ventricle-endocardial-or-uncomplicated-right-ventricular-pacing-how-to-differentiate-in-the-emergency-department
#14
Yalcin Velibey, Baris Yaylak, Tolga Sinan Guvenc, Goksel Cinier, Koray Kalenderoglu, Ozge Guzelburc, Ozlem Yildirimturk
BACKGROUND: Temporary transvenous pacemaker implantation is an important and critical procedure for emergency physicians. Traditionally, temporary pacemakers are inserted by electrocardiography (ECG) guidance in the emergency department because fluoroscopy at the bedside in an unstable patient can be limited by time and equipment availability. However, in the presence of atrial septal defect, ventricular septal defect, and patent foramen ovale, the pacemaker lead can be implanted inadvertently into the left ventricle or directly into the coronary sinus instead of right ventricle...
May 2018: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29513133/qt-prolongation-and-sudden-cardiac-death-risk-in-hypertrophic-cardiomyopathy
#15
Salma I Patel, Michael J Ackerman, Fadi E Shamoun, Jeffrey B Geske, Steve R Ommen, William T Love, Stephen S Cha, Johan M Bos, Steven J Lester
INTRODUCTION: Risk assessment for sudden cardiac death (SCD) in hypertrophic cardiomyopathy (HCM) remains complex. The goal of this study was to assess electrocardiogram (ECG)-derived risk factors on SCD in a large HCM population Methods: Retrospective review of adults with HCM evaluated at Mayo Clinic, Rochester, MN from 1 December 2002 to 31 December 2012 was performed. Data inclusive of ECG and 24-hour ambulatory Holter monitor were assessed. SCD events were documented by ventricular fibrillation (VF) noted on implantable cardioverter defibrillator (ICD), or appropriate VT or VF-terminating ICD shock...
March 7, 2018: Acta Cardiologica
https://www.readbyqxmd.com/read/29508156/cardiac-resynchronization-therapy-emerging-therapeutic-approaches
#16
REVIEW
Neal A Chatterjee, E Kevin Heist
Cardiac resynchronization therapy (CRT) is an important therapeutic tool in the management of patients with heart failure and electrical dyssynchrony. In appropriately selected patients, landmark randomized controlled trials have demonstrated morbidity and mortality benefit beyond standard goal-directed medical therapy. Current guidelines emphasize the greatest clinical efficacy of CRT in patients with symptomatic heart failure, left bundle branch block, and wide QRS duration (> 150 ms). Other relevant considerations include the presence of atrial fibrillation, the presence of AV block, the etiology of cardiomyopathy, the presence of masked left-sided conduction delay, and the impact of comorbidities that might predict poor clinical response...
March 6, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29487684/electrocardiogram-ecg-for-the-prediction-of-incident-atrial-fibrillation-an-overview
#17
REVIEW
Yoshifusa Aizawa, Hiroshi Watanabe, Ken Okumura
Electrocardiograms (ECGs) have been employed to medically evaluate participants in population-based studies, and ECG-derived predictors have been reported for incident atrial fibrillation (AF). Here, we reviewed the status of ECG in predicting new-onset AF. We surveyed population-based studies and revealed ECG variables to be risk factors for incident AF. When available, the predictive values of each ECG risk marker were calculated. Both the atrium-related and ventricle-related ECG variables were risk factors for incident AF, with significant hazard risks (HRs) even after multivariate adjustments...
December 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29479764/how-much-can-synthetic-cannabinoid-damage-the-heart-a-case-of-cardiogenic-shock-following-resistant-ventricular-fibrillation-after-synthetic-cannabinoid-use
#18
Adnan Yamanoglu, Nalan Gokce Celebi Yamanoglu, Tugba Evran, Ozgur Sogut
New substances are constantly being added to the content of synthetic cannabinoids (SCs). SCs can affect the cardiovascular system and cause hypotension and bradycardia, myocardial infarction, atrial fibrillation, prolonged QTc, and Mobitz type II atrioventricular block. However, no cases associated with ventricular fibrillation (VF) have been reported to date. We report a case of a 26-year-old male patient admitted to the emergency department due to altered consciousness after SC use and requiring prolonged cardiopulmonary resuscitation due to resistant VF and cardiogenic shock...
February 26, 2018: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/29470251/clinically-oriented-device-programming-in-bradycardia-patients-part-2-atrioventricular-blocks-and-neurally-mediated-syncope-proposals-from-aiac-italian-association-of-arrhythmology-and-cardiac-pacing
#19
Pietro Palmisano, Matteo Ziacchi, Mauro Biffi, Renato P Ricci, Maurizio Landolina, Massimo Zoni-Berisso, Eraldo Occhetta, Giampiero Maglia, Gianluca Botto, Luigi Padeletti, Giuseppe Boriani
: The purpose of this two-part consensus document is to provide specific suggestions (based on an extensive literature review) on appropriate pacemaker setting in relation to patients' clinical features. In part 2, criteria for pacemaker choice and programming in atrioventricular blocks and neurally mediate syncope are proposed. The atrioventricular blocks can be paroxysmal or persistent, isolated or associated with sinus node disease. Neurally mediated syncope can be related to carotid sinus syndrome or cardioinhibitory vasovagal syncope...
April 2018: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29466924/ventriculoatrial-synchrony-induced-heart-failure
#20
Stefan Andric, Dragica Tesic, Dalibor Somer, Ilija Srdanovic, Tatjana Miljkovic, Djordje G Jakovljevic, Lazar Velicki
OBJECTIVE AND IMPORTANCE: Endless loop tachycardia or pacemaker-mediated tachycardia, and atrioventricular desynchronization arrhythmia or repetitive non-reentrant ventriculoatrial synchrony (RNRVAS) are two forms of reverse impulse conduction - ventriculoatrial (VA) synchrony. Although VA synchrony can theoretically cause aggravation of heart failure, clinical cases describing severe consequential heart failure are lacking. CLINICAL PRESENTATION AND INTERVENTION: We describe a case of a 60-year-old patient who underwent primary percutaneous coronary intervention and mitral valve surgery...
February 21, 2018: Acta Clinica Belgica
keyword
keyword
114313
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"