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Left bundle branch block

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https://www.readbyqxmd.com/read/29223306/diagnostic-accuracy-of-multi-lead-ecgs-obtained-using-a-pocket-sized-bipolar-handheld-event-recorder
#1
Ani Nigolian, Nicolas Dayal, Haïg Nigolian, Carine Stettler, Haran Burri
BACKGROUND: Handheld ECG event recorders are useful for rhythm monitoring but only record a single lead, which may limit interpretation. We sought to investigate if a multi-lead ECG may be reconstituted using this device, and aimed to evaluate diagnostic accuracy. METHODS: A commercially-available handheld bipolar ECG event recorder was used to reconstruct a 9-lead ECG (leads I, II and III, V1-6). Tracings were analyzed independently by a cardiologist and a fellow...
November 21, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29222864/effects-of-cardiac-resynchronization-therapy-after-inferior-myocardial-infarction-on-secondary-mitral-regurgitation-and-mitral-valve-geometry
#2
Christos G Mihos, Evin Yucel, Romain Capoulade, Mary P Orencole, Gaurav A Upadhyay, Orlando Santana, Jagmeet P Singh, Michael H Picard
BACKGROUND: The effects of cardiac resynchronization therapy (CRT) on secondary mitral regurgitation (MR), and mitral valve (MV) and left ventricular (LV) geometry, in patients with prior inferior myocardial infarction is not clearly defined. We assessed these outcomes utilizing 2-dimensional echocardiography, and analyzed echocardiographic geometric variables that may correlate with follow-up MR severity. METHODS: Between 2009 and 2012, 229 CRT were implanted. Twenty-two had prior inferior myocardial infarction, ≥ mild MR at baseline, and serial echocardiography...
December 9, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29203081/semi-automated-qrs-score-as-a-predictor-of-survival-in-crt-treated-patients-with-strict-left-bundle-branch-block
#3
C Reitan, U Chaudhry, B Atwater, J Jacobsson, J P Couderc, X Xia, J Carlson, P G Platonov, R Borgquist
BACKGROUND: Cardiac Resynchronization Therapy (CRT) is widely used for treating selected heart failure patients, but patients with myocardial scar respond worse to treatment. The Selvester QRS scoring system estimates myocardial scar burden using 12-lead ECG. This study's objective was to investigate the scores correlation to mortality in a CRT population. METHODS AND RESULTS: Data on consecutive CRT patients was collected. 401 patients with LBBB and available ECG data were included in the study...
November 15, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29202532/-premature-outflow-tract-ventricular-contraction-combined-with-complete-bundle-branch-block-the-characteristic-electrocardiographic-and-ablation-target-potential-features
#4
C Y Di, Z Wan, K Li, Y S Ding, W H Lin
Objective: To explore the characteristics of electrocardiogram(ECG) and target potential features of premature ventricular contraction (PVC) in patients with complete left/right bundle branch block (CL/RBBB) and compare with those without CL/RBBB. Methods: A retrospective analysis was done in 8 outflow tract PVC patients with CL/RBBB, who successfully underwent radiofrequency ablation from August 2009 to June 2017. According to the bundle branch block chamber, patients were divided into the complete right bundle branch block (CRBBB) group (n=4) and the complete left bundle branch block (CLBBB) group (n=4)...
December 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/29197473/electrocardiographic-findings-in-patients-with-acute-coronary-syndrome-presenting-with-out-of-hospital-cardiac-arrest
#5
Bradley Sarak, Shaun G Goodman, David Brieger, Chris P Gale, Nigel S Tan, Andrzej Budaj, Graham C Wong, Thao Huynh, Mary K Tan, Jacob A Udell, Akshay Bagai, Keith A A Fox, Andrew T Yan
We sought to characterize presenting electrocardiographic findings in patients with acute coronary syndromes (ACSs) and out-of-hospital cardiac arrest (OHCA). In the Global Registry of Acute Coronary Events and Canadian ACS Registry I, we examined presenting and 24- to 48-hour follow-up ECGs (electrocardiogram) of ACS patients who survived to hospital admission, stratified by presentation with OHCA. We assessed the prevalence of ST-segment deviation and bundle branch blocks (assessed by an independent ECG core laboratory) and their association with in-hospital and 6-month mortality among those with OHCA...
November 3, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29191565/magnetic-resonance-imaging-correlates-of-left-bundle-branch-disease-in-patients-with-nonischemic-cardiomyopathy
#6
Chrysanthos Grigoratos, Riccardo Liga, Elena Bennati, Andrea Barison, Giancarlo Todiere, Giovanni Donato Aquaro, Matteo Dell'Omodarme, Michele Emdin, Pier Giorgio Masci
The pathologic correlates of intraventricular conduction delays in patients with nonischemic cardiomyopathy (NIC) have been scarcely investigated. We assessed left ventricular (LV) structural, functional, and tissue abnormalities associated with intraventricular conduction left bundle disease (LBD), including left anterior hemiblock or complete left bundle branch block, in a cohort of patients with NIC submitted to cardiovascular magnetic resonance. Twelve-lead electrocardiogram and cardiovascular magnetic resonance were performed in 196 consecutive patients with NIC...
November 6, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29190874/-subaortic-membrane-in-adults-a-brief-review-of-literature-apropos-of-one-case
#7
Katherine Ruiz, Jorge Curotto-Grasiosi, Rogelio A Machado, Adriana Angel, Diego Alasia, Bruno Peressotti
A 54-year-old man, ex smoker with high blood pressure and a history of possible Wolff-Parkinson-White syndrome was admitted for presenting an episode suggestive of acute coronary syndrome with immediate syncope and left bundle branch block, while performing physical activity. Angioplasty and a drug-eluting stent were performed in the left circumflex artery. Subsequently, Doppler echocardiography disclosed an image suggestive of a subaortic membrane. Given these findings, the patient underwent a 3D transesophageal echocardiogram and a magnetic resonance study, which confirmed the diagnosis of a subaortic membrane...
November 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/29185615/predictors-of-total-mortality-and-echocardiographic-response-for-cardiac-resynchronization-therapy-a-cohort-study
#8
Guilherme Ferreira Gazzoni, Matheus Bom Fraga, Andres Di Leoni Ferrari, Pablo da Costa Soliz, Anibal Pires Borges, Eduardo Bartholomay, Carlos Antonio Abunader Kalil, Vanessa Giaretta, Luis Eduardo Paim Rohde
BACKGROUND: Clinical studies demonstrate that up to 40% of patients do not respond to cardiac resynchronization therapy (CRT), thus, appropriate patient selection is critical to the success of CRT in heart failure. OBJECTIVE: Evaluation of mortality predictors and response to CRT in the Brazilian scenario. METHODS: Retrospective cohort study including patients submitted to CRT in a tertiary hospital in southern Brazil from 2008 to 2014. Survival was assessed through a database of the State Department of Health (RS)...
November 27, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29185614/permanent-pacing-after-transcatheter-aortic-valve-implantation-incidence-predictors-and-evolution-of-left-ventricular-function
#9
Cláudio Monteiro, Andres Di Leoni Ferrari, Paulo Ricardo Avancini Caramori, Luiz Antonio Ferreira Carvalho, Dimytri Alexandre de Alvim Siqueira, Luiz Eduardo Koenig São Thiago, Marco Perin, Valter C de Lima, Enio Guérios, Fabio Sandoli De Brito
BACKGROUND: Transcatheter aortic valve implantation (TAVI) is a well-established procedure; however, atrioventricular block requiring permanent pacemaker implantation (PPI) is a common complication. OBJECTIVES: To determine the incidence, predictors and clinical outcomes of PPI after TAVI, focusing on how PPI affects left ventricular ejection fraction (LVEF) after TAVI. METHODS: The Brazilian Multicenter TAVI Registry included 819 patients submitted to TAVI due to severe aortic stenosis from 22 centers from January/2008 to January/2015...
November 27, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29184614/idiopathic-fascicular-left-ventricular-tachycardia
#10
Yaser Alahmad, Nidal Ahmad Asaad, Salaheddin Omran Arafa, Shahul Hameed Ahmad Khan, Alsayed Mahmoud
Idiopathic left fascicular ventricular tachycardia (ILFVT) is characterized by right bundle branch block morphology and left axis deviation. We report a case of idiopathic left ventricular fascicular tachycardia in a young 31-year-old male patient presenting with a narrow complex tachycardia.
July 2017: Heart Views: the Official Journal of the Gulf Heart Association
https://www.readbyqxmd.com/read/29183713/right-bundle-branch-block-pattern-after-uncomplicated-right-ventricular-outflow-tract-pacing-in-a-patient-with-a-left-sided-superior-vena-cava-and-corrected-tetralogy-of-fallot
#11
Anunay Gupta, Neeraj Parakh, Rajnish Juneja
Usually an electrocardiogram after right ventricular (RV) pacing should yield left bundle branch block (LBBB) pattern. However, the presence of right bundle branch block (RBBB) pattern after pacemaker implantation should alert the physician to a malposition of lead. We report a case of 18-year-old female who underwent dual chamber pacemaker implantation and had RBBB pattern post implantation. Detailed evaluation revealed an uncomplicated right ventricular outflow tract pacing. The possible causes of this abnormal pattern after an uncomplicated RV pacing are also reviewed...
November 25, 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29178366/do-we-overestimate-left-ventricular-ejection-fraction-by-two-dimensional-echocardiography-in-patients-with-left-bundle-branch-block
#12
Ali K Cabuk, Gizem Cabuk, Ahmet Sayin, Murat Karamanlioglu, Barış Kilicaslan, Cenk Ekmekci, Hatice Solmaz, Omer F Aslanturk, Oner Ozdogan
AIMS: Left bundle branch block (LBBB) causes a dyssynchronized contraction of left ventricle. This is a kind of regional wall-motion abnormality and measuring left ventricular ejection fraction (LVEF) by two-dimensional (2D) echocardiography could be less reliable in this particular condition. Our aim was to evaluate the role of dyssynchrony index (SDI), measured by three-dimensional (3D) echocardiography, in assessment of LVEF and left ventricular volumes accurately in patients with LBBB...
November 26, 2017: Echocardiography
https://www.readbyqxmd.com/read/29174022/patients-with-left-bundle-branch-block-and-left-axis-deviation-show-a-specific-left-ventricular-asynchrony-pattern-implications-for-left-ventricular-lead-placement-during-crt-implantation
#13
Luigi Sciarra, Paolo Golia, Zefferino Palamà, Antonio Scarà, Ermenegildo De Ruvo, Alessio Borrelli, Anna Maria Martino, Monia Minati, Alessandro Fagagnini, Claudia Tota, Lucia De Luca, Domenico Grieco, Pietro Delise, Leonardo Calò
BACKGROUND: Left bundle branch block (LBBB) and left axis deviation (LAD) patients may have poor response to resynchronization therapy (CRT). We sought to assess if LBBB and LAD patients show a specific pattern of mechanical asynchrony. METHODS: CRT candidates with non-ischemic cardiomyopathy and LBBB were categorized as having normal QRS axis (within -30° and +90°) or LAD (within -30° and -90°). Patients underwent tissue Doppler imaging (TDI) to measure time interval between onset of QRS complex and peak systolic velocity in ejection period (Q-peak) at basal segments of septal, inferior, lateral and anterior walls, as expression of local timing of mechanical activation...
October 21, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29173611/a-novel-pacing-strategy-with-low-and-stable-output-pacing-the-left-bundle-branch-immediately-beyond-the-conduction-block
#14
Weijian Huang, Lan Su, Shengjie Wu, Lei Xu, Fangyi Xiao, Xiaohong Zhou, Kenneth A Ellenbogen
This report demonstrates the feasibility of pacing the left bundle branch (LBB) immediately beyond the conduction block to functionally restore the impaired His-Purkinje conduction system in a patient with heart failure and left bundle branch block (LBBB). The pacing required only a low pacing output (0.5 volts/0.5 ms) to correct the LBBB with accompanying right BBB on the electrocardiogram. Over 1-year of follow-up, the patient had a significant improvement in clinical outcome and echocardiographic measurements...
December 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/29168462/potential-benefit-of-optimizing-atrioventricular-interventricular-delays-in-patients-with-cardiac-resynchronization-therapy
#15
Bozena Urbanek, Krzysztof Kaczmarek, Artur Klimczak, Jan Ruta, Michal Chudzik, Katarzyna Piestrzeniewicz, Pawel Ptaszynski, Jerzy Krzysztof Wranicz
BACKGROUND & OBJECTIVES: The clinical benefit of optimization (OPT) of atrioventricular delay (AVD) and interventricular delay (VVD) in cardiac resynchronization therapy (CRT) remains debatable. This study was aimed to determine the influence of AVD and VVD OPT on selected parameters in patients early after CRT implantation and at mid-term follow up (FU). METHODS: Fifty two patients (61±10 yr, 23 males) with left bundle branch block, left ventricular ejection fraction (LVEF) ≤35 per cent and heart failure were selected for CRT implantation...
July 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29165759/transient-receptor-potential-melastatin-4-cation-channel-in-pediatric-heart-block
#16
J Tian, X-J An, M-Y Fu
Progressive cardiac conduction disease (PCCD) is a common pediatric heart conduction disorder. It is an autosomal inheritance of rare mutations, which leads to familial cases of PCCD. In these cases, the His-Purkinje system's conductive capacity is progressively deranged, involving either right or left bundle branch block. Also, QRS complexes display widening is an important characteristic that culminates in complete AV block, syncope, and sudden death. Mutations in TRPM4 gene that encodes for transient receptor potential melastatin 4 have recently been reported to cause familial cases of PCCD and heart block...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29164019/quantitative-analysis-of-electro-anatomical-maps-application-to-an-experimental-model-of-left-bundle-branch-block-cardiac-resynchronization-therapy
#17
David Soto Iglesias, Nicolas Duchateau, Constantine Butakoff Kostantyn Butakov, David Andreu, Juan Fernandez-Armenta, Bart Bijnens, Antonio Berruezo, Marta Sitges, Oscar Camara
Electro-anatomical maps (EAMs) are commonly acquired in clinical routine for guiding ablation therapies. They provide voltage and activation time information on a 3-D anatomical mesh representation, making them useful for analyzing the electrical activation patterns in specific pathologies. However, the variability between the different acquisitions and anatomies hampers the comparison between different maps. This paper presents two contributions for the analysis of electrical patterns in EAM data from biventricular surfaces of cardiac chambers...
2017: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/29150300/permanent-his-bundle-pacing-to-replace-biventricular-pacing-for-cardiac-resynchronization-therapy
#18
Benjamin J Scherlag, Alexa Papaila
INTRODUCTION: Cardiac resynchronization therapy (CRT) or biventricular pacing (BIVP) has become a common procedure for the treatment of ventricular dyssynchrony in patients with heart failure, particularly in those with bundle branch block patterns (QRS durations >150ms) on the electrocardiogram (ECG). However, a large group of non-responders are made up of patients with dyssynchrony and QRS duration below 130ms. Recent studies have introduced permanent His bundle pacing as another method for achieving normalization of the QRS duration even in a majority of patients with right or left bundle branch block pattern on the ECG...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29146296/anomalous-origin-of-coronary-arteries-from-the-wrong-sinus-in-athletes-diagnosis-and-management-strategies
#19
Vincenzo Palmieri, Salvatore Gervasi, Massimiliano Bianco, Roberta Cogliani, Barbara Poscolieri, Francesco Cuccaro, Riccardo Marano, Mario Mazzari, Cristina Basso, Paolo Zeppilli
AIMS: Although anomalous origin of left (AOLCA) and right coronary artery (AORCA) from the wrong sinus may cause sudden death (SD) in athletes, early diagnosis and management of these anomalies are still challenging. We analysed clinical/instrumental profiles of athletes identified with AOLCA/AORCA focusing our attention on diagnosis, management and follow-up. METHODS AND RESULTS: We report 23 athletes (17 males, mean age 27±17yrs.), 6 with AOLCA and 17 with AORCA...
November 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29138649/-clinical-and-electrocardiographic-aspect-of-pulmonary-embolism-masking-aortic-dissection-revealed-by-thoracic-ct-angiography
#20
Daniella Rakotoniaina Masinarivo, Jenny Larissa Rakotomanana
We here report the case of a 52-year old hypertensive, obese woman (BMI 32,46 kg/m(2)) with a past history of smoking and without evidence-based risk factors of venous thromboembolism, hospitalized for left chest pain radiating to the dorsolumbar region associated with dyspnoea. Clinical examination on hopitalization showed left blood pressure 100/60 mmHg, tachycardia 100/min, oxygen desaturation index at 88% with the patient breathing ambient air, normal cardiopulmonary auscultation, peripheral pulses palpable and no symptoms of phlebitis of the lower limbs...
2017: Pan African Medical Journal
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