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https://www.readbyqxmd.com/read/29784020/atrioventricular-block-after-acute-myocardial-infarction-and-its-association-with-other-clinical-parameters-in-pakistani-patients-an-institutional-perspective
#1
Kashif Ali Hashmi, Amir Shehzad, Atif Ali Hashmi, Amir Khan
OBJECTIVES: Conduction defects complicating acute myocardial infarction are frequently associated with increased morbidity and mortality. As frequency of this complication has not been widely studied in our population, therefore in this study we aimed to evaluate the frequency of complete atrioventricular block in patients with acute ST segment elevation myocardial infarction and its association with other clinical parameters. RESULTS: The mean age of the patients was 50...
May 21, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29759778/does-first-degree-av-block-have-importance-in-patients-considered-for-cardiac-resynchronization-therapy-giving-it-the-third-degree
#2
EDITORIAL
Brian Olshansky
No abstract text is available yet for this article.
August 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29758405/accelerometer-based-av-synchronous-pacing-with-a-ventricular-leadless-pacemaker-results-from-the-micra-av-feasibility-studies
#3
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/29749935/improvement-of-reverse-remodeling-using-electrocardiogram-fusion-optimized-intervals-in-cardiac-resynchronization-therapy-a-randomized-study
#4
Emilce Trucco, José María Tolosana, Elena Arbelo, Ada Doltra, María Ángeles Castel, Eva Benito, Roger Borràs, Eduard Guasch, Silvia Vidorreta, Barbara Vidal, Silvia Montserrat, Marta Sitges, Antonio Berruezo, Josep Brugada, Lluís Mont
OBJECTIVES: The aim of this study was to compare patient response to cardiac resynchronization therapy (CRT) using fusion-optimized atrioventricular (AV) and interventricular (VV) intervals versus nominal settings. BACKGROUND: The additional benefit obtained by AV- and VV-interval optimization in patients undergoing CRT remains controversial. Previous studies show short-term benefit in hemodynamic parameters; however, midterm randomized comparison between electrocardiogram optimization and nominal parameters is lacking...
February 2018: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29709231/anterior-myocardial-infarction-with-high-degree-av-block-in-a-62-year-old-man
#5
Hein J Wellens
No abstract text is available yet for this article.
May 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29701363/david-operation-in-the-bicuspid-aortic-valve-population
#6
Pedro Magro, Marta Marques, Miguel Abecacis
INTRODUCTION: Bicuspid aortic valve (BAV) is the single most common cardiac congenital mal-formation with a prevalence of 1-2%. It is frequently associated with aortic disease including annular ectasia. Increasing evidence suggests that valve-sparing root re-implantation surgery combined with primary aortic valve repair can be performed with good midterm results in patients with BAV. METHODS: Our objective is to compare the short and long term results of David procedure in BAV patients with aortic root ectasia...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29678778/clinical-and-electrophysiologic-characteristics-of-patients-with-paroxysmal-intra-his-block-with-narrow-qrs-complexes
#7
Loheetha Ragupathi, Drew Johnson, Arnold Greenspon, Daniel Frisch, Reginald T Ho, Behzad B Pavri
BACKGROUND: Atrioventricular block (AVB) is usually due to infra-nodal disease and associated with a wide QRS complex; such patients often progress to complete AV block and pacemaker dependency. Uncommonly, infra-nodal AVB can occur within the His bundle with a narrow QRS complex. OBJECTIVE: To define clinical/echocardiographic characteristics of patients with AV block within the His bundle and report on progression to pacemaker dependency. METHODS: We retrospectively identified patients with narrow QRS complexes and documented intra-His delay or block on electrophysiologic study (Group A), or with ECG documented Mobitz II AVB/paroxysmal AVB (Group B)...
April 17, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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/29614795/full-atrioventricular-block-secondary-to-acute-poisoning-mercury-a-case-report
#9
Amelia Geraldine Peregrina-Chávez, María Del Rayo Ramírez-Galindo, Rolando Chávez-Martínez, Cesar Anuar Delahanty-Delgado, Fernando Vazquez-Alaniz
Background: The biological behaviour and clinical significance of mercury toxicity vary according to its chemical structure. Mercury differs in its degree of toxicity and in its effects on the nervous, digestive and immune systems as well as on organs such as the lungs, kidneys, skin, eyes and heart. Human exposure occurs mainly through inhalation of elemental mercury vapours during industrial and artisanal processes such as artisanal and small-scale gold mining. Case presentation: A 52-years-old female, housewife, with a body mass index of 25...
April 2, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29572123/clinical-and-electrocardiographic-presentations-of-transient-trifascicular-block-in-three-cats
#10
Eva M Oxford, Flavia B Giacomazzi, N Sydney Moïse, Roberto A Santilli
This report describes transient trifascicular block in three cats presented with lethargy and inappetence, and elevated cardiac troponin I concentrations. The electrocardiogram (ECG) of cat 1 showed a sinus rhythm with pronounced first-degree atrioventricular (AV) block, right bundle branch block, and left anterior fascicular block. The ECG of cat 2 showed truncular left bundle branch block alternating with left anterior fascicular block coupled with prolonged PR intervals, second-degree heart block, and paroxysmal third-degree AV block...
March 20, 2018: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/29556909/outcome-of-slow-pathway-modulation-for-atrioventricular-nodal-reentrant-tachycardia-with-50-versus-30-watts-more-power-more-effect
#11
Dirk G Dechering, Ruben Schleberger, Eva Greiser, Jannis Dickow, Julia Koebe, Gerrit Frommeyer, Stephan Willems, Lars Eckardt, Boris A Hoffmann, Kristina Wasmer
PURPOSE: Slow pathway modulation is the treatment of choice in patients with atrioventricular nodal reentrant tachycardia (AVNRT). No comparative data on ablation strategies exist. Therefore, we sought to compare two common ablation approaches. METHODS: We analyzed prospective ablation databases of two high-volume tertiary centers (> 1000 ablations/year) using either 30 or 50 W for slow pathway modulation from 2012 to 2013. We analyzed procedural characteristics as well as short- and long-term outcomes...
March 19, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29550833/a-case-of-lown-ganong-levine-syndrome-due-to-an-accessory-pathway-of-james-fibers-or-enhanced-atrioventricular-nodal-conduction-eavnc
#12
Juanita Hunter, Emmanouil Tsounias, John Cogan, Ming-Lon Young
BACKGROUND Lown-Ganong-Levine syndrome, includes a short PR interval, normal QRS complex, and paroxysmal tachycardia. The pathophysiology of this syndrome includes an accessory pathway connecting the atria and the atrioventricular (AV) node (James fiber), or between the atria and the His bundle (Brechenmacher fiber). Similar features are seen in enhanced atrioventricular nodal conduction (EAVNC), with the underlying pathophysiology due to a fast pathway to the AV node, and with the diagnosis requiring specific electrophysiologic criteria...
March 18, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29540351/beer-hyponatraemia-and-cardiac-conduction-defects
#13
Simon Mifsud, Emma Louise Schembri, Matthew Mercieca Balbi, Mark Gruppetta, James Clark
The authors report a case of a 68-year-old man who was diagnosed with an irreversible second-degree atrioventricular (AV) Mobitz II 2:1 block temporally associated with profound hyponatraemia. The cause of the hyponatraemia was beer potomania. The co-occurrence of reversible first, second and third-degree heart blocks and hyponatraemia has been described in a few published case reports. However, this case is noteworthy as the AV block persisted, despite correction of serum sodium concentration as opposed to other published cases, which meant that the patient required a permanent pacemaker...
March 14, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29534001/the-popeye-domain-containing-genes-and-their-function-as-camp-effector-proteins-in-striated-muscle
#14
REVIEW
Thomas Brand
The Popeye domain containing (POPDC) genes encode transmembrane proteins, which are abundantly expressed in striated muscle cells. Hallmarks of the POPDC proteins are the presence of three transmembrane domains and the Popeye domain, which makes up a large part of the cytoplasmic portion of the protein and functions as a cAMP-binding domain. Interestingly, despite the prediction of structural similarity between the Popeye domain and other cAMP binding domains, at the protein sequence level they strongly differ from each other suggesting an independent evolutionary origin of POPDC proteins...
March 13, 2018: Journal of Cardiovascular Development and Disease
https://www.readbyqxmd.com/read/29529974/the-electrocardiographic-manifestations-of-athlete-s-heart-and-their-association-with-exercise-exposure
#15
Bram Bessem, Matthijs C de Bruijn, Wybe Nieuwland, Johannes Zwerver, Maarten van den Berg
OBJECTIVE: The aim of this study was to define the minimum amount of exercise per week ('current exposure') and the total amount of exercise ('lifetime exposure') needed to lead to the electrocardiographic changes fitting athlete's heart. METHODS: All the pre-participation screenings (including electrocardiograms (ECGs)) from collegiate athletes performed at University Sports Medical Center in 2013 and 2014 were collected. Data on height, weight, sex, age, current sport(s) participation and lifetime sport(s) participation were collected...
March 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29518324/deficient-lipid-a-remodeling-by-the-arnb-gene-promotes-biofilm-formation-in-antimicrobial-peptide-susceptible-pseudomonas-aeruginosa
#16
Li-Av Segev-Zarko, Gal Kapach, Michaele Josten, Yoel Alexander Klug, Hans-Georg Sahl, Yechiel Shai
Multidrug resistant bacteria possess various mechanisms that can sense environmental stresses such as antibiotics and antimicrobial peptides and rapidly respond to defend themselves. Two known defense strategies are biofilm formation and lipopolysaccharide (LPS) modification. Though LPS modifications are observed in biofilm-embedded bacteria, their effect on biofilm formation is unknown. Using biochemical and biophysical methods coupled with confocal microscopy, atomic force microscopy, and transmission electron microscopy, we show that biofilm formation is promoted in a Pseudomonas aeruginosa PAO1 strain with a loss of function mutation in the arnB gene...
April 3, 2018: Biochemistry
https://www.readbyqxmd.com/read/29514866/intramyocardial-block-in-patients-with-atrioventricular-block
#17
Guoliang Li, Ardan M Saguner, Deniz Akdis, Guy H Fontaine
Atrioventricular (AV) block has been extensively studied. However, conduction inside the myocardium in patients with AV block has not been reported. In this study, we aimed to demonstrate the presence of intramyocardial block in patients with AV block. Five consecutive patients with spontaneous high-grade AV block and Torsades de pointes (TdP) were prospectively studied with standard United States Catheter Instruments (USCI) endocardial temporary catheter located at the right ventricle (RV) apex. The morphology of endocardial potentials observed in the basic QRS complexes as well as during episodes of TdP was studied...
March 7, 2018: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/29513133/qt-prolongation-and-sudden-cardiac-death-risk-in-hypertrophic-cardiomyopathy
#18
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/29508515/unexpected-delayed-complete-atrioventricular-block-after-cardioband-implantation
#19
Carlotta Sorini Dini, Daniele Landi, Francesco Meucci, Carlo Di Mario
The Cardioband system is a transcatheter direct annuloplasty device that is implanted in patients with severe symptomatic functional mitral regurgitation (MR) due to annulus dilatation and high surgical risk. This device covers the posterior two-thirds of the annulus, from the anterolateral to the posteromedial commissure, implanted in close proximity of the left circumflex artery, atrioventricular (AV) conduction system, and coronary sinus. We present the case of an 80-year-old-gentleman with prohibitive surgical risk, treated with Cardioband implantation for functional MR with an evident P1-P2 cleft and P2-P3 indentation, a relative contraindication to MitraClip implantation...
March 6, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29508156/cardiac-resynchronization-therapy-emerging-therapeutic-approaches
#20
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
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