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Left anterior hemiblock

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https://www.readbyqxmd.com/read/30136134/bundle-branch-blocks-and-or-hemiblocks-complicating-acute-myocardial-ischemia-or-infarction
#1
Samuel Lévy
Despite the bulk of anatomical and histologic evidence supporting the existence of three fascicules in the left branch of the His bundle, the concept of a bifascicular system proposed by Rosenbaum and his school has been adopted by the cardiological community as a practical teaching tool. Left anterior hemiblock (LAH) refers to block of the antero-superior branch of the left branch which is small and left posterior hemiblock (LPH) to block of the postero-inferior branch which is larger. The LAH is more common that the LPH and often associated with a complete right bundle branch block (RBBB)...
August 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/30128802/hemiblocks-and-the-fascicular-system-myths-and-implications
#2
John D Fisher
The His bundle divides into the right bundle branch (RBB) and the more complex left bundle branch (LBB). The latter is typically represented as further dividing into anterior and posterior fascicles, and possibly an additional septal fascicle. This construct raises questions as to why conduction can be preserved in patients with "trifascicular block" and why it sometimes very difficult to ablate fascicular or papillary muscle tachycardias. The answer may be that the LBB is much more complex, variable, and interconnected and that the simple familiar constructs may have obstructed our understanding of conduction and tachycardias...
August 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29986018/first-degree-atrioventricular-block-on-basal-electrocardiogram-predicts-future-arrhythmic-events-in-patients-with-brugada-syndrome-a-long-term-follow-up-study-from-the-veneto-region-of-northeastern-italy
#3
Federico Migliore, Martina Testolina, Alessandro Zorzi, Emanuele Bertaglia, Maria Silvano, Loira Leoni, Anna Bellin, Cristina Basso, Gaetano Thiene, Giuseppe Allocca, Pietro Delise, Sabino Iliceto, Domenico Corrado
Aims: This study was designed to assess the prognostic value of clinical and electrocardiographic parameters in Brugada syndrome (BrS). Methods and results: The study population included 272 consecutive patients (82% males; mean age 43 ± 12 years), with either a spontaneous (n = 137, 50%) or drug-induced (n = 135, 50%) Type 1 Brugada electrocardiogram (ECG) pattern. The study combined endpoint included sudden cardiac death (SCD), cardiac arrest, and appropriate intervention of implantable cardioverter-defibrillator (ICD)...
July 6, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29440008/novel-%C3%AE-actin-gene-mutation-p-ala21val-causing-familial-hypertrophic-cardiomyopathy-myocardial-noncompaction-and-transmural-crypts-clinical-pathologic-correlation
#4
Andrea Frustaci, Alessandro De Luca, Valentina Guida, Tommaso Biagini, Tommaso Mazza, Carlo Gaudio, Claudio Letizia, Matteo Antonio Russo, Nicola Galea, Cristina Chimenti
BACKGROUND: Mutations of α-actin gene (ACTC1) have been phenotypically related to various cardiac anomalies, including hypertrophic cardiomyopathy and dilated cardiomyopathy and left ventricular (LV) myocardial noncompaction. A novel ACTC mutation is reported as cosegregating for familial hypertrophic cardiomyopathy and LV myocardial noncompaction with transmural crypts. METHODS AND RESULTS: In an Italian family of 7 subjects, 4 aged 10 (II-1), 14 (II-2), 43 (I-4) and 46 years (I-5), presenting abnormal ECG changes, dyspnea and palpitation (II-2, I-4, and I-5), and recurrent cerebral ischemic attack (I-5), underwent 2-dimensional echo, cardiac magnetic resonance, Holter monitoring, and next-generation sequencing gene analysis...
February 10, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29191565/magnetic-resonance-imaging-correlates-of-left-bundle-branch-disease-in-patients-with-nonischemic-cardiomyopathy
#5
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...
February 1, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/28899954/differentiating-the-qrs-morphology-of-posterior-fascicular-ventricular-tachycardia-from-right-bundle-branch-block-and-left-anterior-hemiblock-aberrancy
#6
MULTICENTER STUDY
Yoav Michowitz, Oholi Tovia-Brodie, Ishai Heusler, Avi Sabbag, Michael Rahkovich, Hezzy Shmueli, Aharon Glick, Bernard Belhassen
BACKGROUND: Left posterior fascicular ventricular tachycardia (LPF-VT) is frequently misdiagnosed as supraventricular tachycardia with aberrant right bundle branch block (RBBB) and left anterior hemiblock (LAHB). The purpose of the present study was to define the morphological ECG characteristics of LPF-VT and attempt to differentiate it from RBBB and LAHB aberrancy. METHODS AND RESULTS: A systematic Medline search was used to identify or locate ECG tracings from patients with LPF-VTs...
September 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27989053/conventional-and-novel-predictors-of-permanent-pacemaker-after-tavi-in-atrial-fibrillation-patients
#7
Guilherme Portugal, Lino Patrício, Ana Abreu, Duarte Cacela, Mário Oliveira, Rui Ferreira
BACKGROUND AND AIM OF THE STUDY: Atrial fibrillation (AF) is common in patients submitted for transcatheter aortic valve implantation (TAVI), and these patients are at higher risk of developing conduction system disturbances requiring pacemaker (PM) implantation. Conventional predictors for PM use in this population have limited applicability. It was hypothesized that a post-procedural heart rate reduction could gauge the degree of atrioventricular (AV) node injury, and that this would be a clinically useful predictor of a need for PM...
May 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/27965025/cardiovascular-outcomes-in-patients-with-intraventricular-conduction-blocks-a-sixteen-year-follow-up-in-a-state-wide-database
#8
COMPARATIVE STUDY
John S Pantazopoulos, Alice David, William J Kostis, Nora M Cosgrove, John B Kostis
BACKGROUND: To assess the adverse clinical effects of left anterior hemiblock alone or in combination with right bundle branch block and of complete left bundle branch block in comparison with isolated right bundle branch block and the relationship of these effects with altered mechanoelectric factors resulting in left ventricular dysfunction. METHODS: In a 16-year follow-up study using a statewide database, we studied the occurrence of mortal and morbid cardiovascular (CV) events among patients without apparent ischemic heart disease who had left anterior hemiblock (LAHB, n=4273, right bundle branch block (RBBB) with LAHB (BFBB, n=1857) and left bundle branch block (LBBB, n=9484 compared to isolated RBBB (n=25288)...
May 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/27391877/association-between-progressive-intraventricular-conduction-disturbance-and-cardiovascular-events
#9
Hideki Hayashi, Qi Wu, Minoru Horie
BACKGROUND: Prolonged QRS duration on electrocardiogram (ECG) has been known as a poor prognostic marker. However, little is known about association between progressive intraventricular conduction disturbance and cardiovascular prognosis. METHODS: From among a database containing 359,737 12-lead ECG recordings, patients whose QRS duration progressively increased from <120 msec to ≥120 msec were selected using software. The prognosis of patients was searched by medical record...
2016: PloS One
https://www.readbyqxmd.com/read/27169162/absence-of-septal-q-waves-an-important-predictor-of-significant-coronary-artery-disease-and-mainly-proximal-stenosis-of-the-left-anterior-descending-artery
#10
Anthony Matta, Kamal Kallab, Alexandre Kharma
AIMS: Data concerning the correlation between the absence of septal q waves and significant stenosis of proximal left anterior descending (LAD) artery shows conflicting results. This retrospective study was conducted to show that absence of septal q waves in leads V5-V6 could be of value in predicting significant coronary artery disease (CAD) and mainly significant proximal LAD coronary artery stenosis. METHODS: Our study included 500 consecutive patients who had coronary angiography, retrospectively chosen, excluding patients with acute coronary syndromes, and patients with abnormal ECGs (abnormal QRS duration, pathological q waves and hemiblocks)...
January 2016: Le Journal Médical Libanais. the Lebanese Medical Journal
https://www.readbyqxmd.com/read/27149998/transient-ischemic-right-axis-deviation-tendency-of-the-frontal-plane-qrs-axis-in-a-case-of-inferior-myocardial-ischemia
#11
Kohei Hasegawa, Tomofumi Takaya, Shumpei Mori, Fumitaka Soga, Hachidai Takahashi, Daisuke Terashita, Hiromasa Otake, Ken-Ichi Hirata
A 73-year-old man was admitted to our hospital because of chest pain at rest. Electrocardiography (ECG) showed an ST-segment depression, a negative U-wave in the precordial leads, and a right axis deviation (RAD) tendency. Coronary angiography revealed occlusion of the right coronary artery. Collateral flow from the jeopardized left anterior descending artery to the posterior descending artery (PDA) was fair. After successful revascularization, improvement in the ECG findings was noted. Since blood supply to the left posterior fascicle is dependent on the PDA, the RAD tendency could be explained by the presence of a transient ischemic left posterior hemiblock...
May 25, 2016: International Heart Journal
https://www.readbyqxmd.com/read/26407512/electrocardiogram-and-chagas-disease-a-large-population-database-of-primary-care-patients
#12
Milena S Marcolino, Daniel M Palhares, Lorena R Ferreira, Antonio L Ribeiro
BACKGROUND: Chagas disease (ChD) used to be a disease restricted to Latin America, but has become a worldwide problem due to migration of infected individuals to developed countries. Electrocardiography has been considered an essential exam to evaluate ChD patients. OBJECTIVE: This study sought to identify prevalent electrocardiographic abnormalities in a large sample of ChD patients evaluated in the primary care setting. METHODS: This retrospective observational study assessed all consecutive digital 12-lead electrocardiograms (ECG) performed by the Telehealth Network of Minas Gerais, Brazil, from January 1 to December 31, 2011...
September 2015: Global Heart
https://www.readbyqxmd.com/read/26201553/cervical-subluxation-associated-with-posterior-cervical-hemivertebra
#13
R Otero-López, M Rivero-Garvía, J Márquez-Rivas, J Valencia
PURPOSE: Hemivertebrae, associated with a failure in the formation and fusion of vertebral body ossification nuclei, are a common cause of thoracic or lumbar scoliosis. A cervical location is rare and even rarer as a cause of cervical subluxation in flexion and extension (for which only one previous case has been found). CASE REPORT: We report on the case of a 7-year-old female patient, who was examined for a cervical fusion defect, consisting of a posterior C4 hemivertebra and a left hemiblock from C5 to C7...
February 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/25339162/clinical-electrocardiographic-and-echocardiographic-features-in-patients-with-major-arterial-vascular-disease-assigned-to-surgical-revascularization
#14
Dimitri Tsialtas, Maria G Bolognesi, Tiziano Tecchio, Matteo Azzarone, Federico Quaini, Roberto Bolognesi
BACKGROUND: Preoperative cardiac assessment may essentially contribute to estimate the operative risk in vascular surgery.This study was undertaken to depict the clinical conditions and cardiac status in patients before elective major vascular surgery. PATIENTS AND METHODS: 143 patients with asymptomatic critical aortic abdominal aneurysm, 119 with high-grade carotid stenosis, and 138 with advanced symptomatic ischemia due to peripheral artery disease were assigned to surgical revascularization...
November 2014: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/25334100/atypical-pattern-of-electrical-alternans-in-a-patient-with-severe-bronchial-asthma-exacerbation
#15
Mouhamad Nasser, Jad Degheili, Mohamed Kanj, Nadim Kanj
SESSION TITLE: Cardiovascular Global Case ReportsSESSION TYPE: Global Case ReportPRESENTED ON: Tuesday, October 28, 2014 at 01:30 PM - 02:30 PMINTRODUCTION: Electrical alternans is an electrocardiographic phenomenon consisting of alternating QRS amplitude or axis in any or all leads. The most readily recognized and understood form of electrical alternans is QRS alternans associated with pericardial effusion. Here we present a case of atypical pattern of electrical alternans in a patient with severe bronchial asthma exacerbation and this is to our knowledge represents a second case of this unusual electrocardiographic sign after a previous case reported by Dr...
October 1, 2014: Chest
https://www.readbyqxmd.com/read/25011716/predictors-of-permanent-pacemaker-implantation-in-patients-with-severe-aortic-stenosis-undergoing-tavr-a-meta-analysis
#16
REVIEW
George C M Siontis, Peter Jüni, Thomas Pilgrim, Stefan Stortecky, Lutz Büllesfeld, Bernhard Meier, Peter Wenaweser, Stephan Windecker
BACKGROUND: Atrioventricular (AV) conduction disturbances requiring permanent pacemaker (PPM) implantation may complicate transcatheter aortic valve replacement (TAVR). Available evidence on predictors of PPM is sparse and derived from small studies. OBJECTIVES: The objective of this study was to provide summary effect estimates for clinically useful predictors of PPM implantation after TAVR. METHODS: We performed a systematic search for studies that reported the incidence of PPM implantation after TAVR and that provided raw data for the predictors of interest...
July 15, 2014: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/24979699/heart-rate-recovery-in-asymptomatic-patients-with-chagas-disease
#17
Maria Clara Noman de Alencar, Manoel Otávio da Costa Rocha, Márcia Maria de Oliveira Lima, Henrique Silveira Costa, Giovane Rodrigo Sousa, Renata de Carvalho Bicalho Carneiro, Guilherme Canabrava Rodrigues Silva, Fernando Vieira Brandão, Lucas Jordan Kreuser, Antonio Luiz Pinho Ribeiro, Maria Carmo Pereira Nunes
BACKGROUND: Chagas disease patients with right bundle-branch block (RBBB) have diverse clinical presentation and prognosis, depending on left ventricular (LV) function. Autonomic disorder can be an early marker of heart involvement. The heart rate recovery (HRR) after exercise may identify autonomic dysfunction, with impact on therapeutic strategies. This study was designed to assess the HRR after symptom-limited exercise testing in asymptomatic Chagas disease patients with RBBB without ventricular dysfunction compared to patients with indeterminate form of Chagas disease and healthy controls...
2014: PloS One
https://www.readbyqxmd.com/read/24975014/long-term-prognostic-value-of-major-and-minor-ecg-abnormalities-in-latent-keshan-disease-with-suspect-chronic-keshan-disease
#18
Yanhe Zhu, Bingqi Lai, Xiaolin Niu, Jin Wei, Wuhong Tan, Xinfeng Wang
OBJECTIVE: This study aims to determine whether baseline electrocardiography (ECG) abnormalities, the appearance of new ECG abnormalities, or other clinical characteristics are associated with increased rates of progression to chronic Keshan disease (KD) among patients with latent KD. METHODS: Four hundred and fourteen new latent KD patients from a monitored population in China were diagnosed and then followed for 10 years. Baseline and 10-year ECG abnormalities were classified according to the Minnesota Code as major and minor...
2014: Journal of Epidemiology
https://www.readbyqxmd.com/read/24934299/evolution-of-electrocardiographic-abnormalities-in-association-with-neuromuscular-disorders-and-survival-in-left-ventricular-hypertrabeculation-noncompaction
#19
Claudia Stöllberger, Daniel Gerger, Peter Jirak, Christian Wegner, Josef Finsterer
BACKGROUND: Left ventricular hypertrabeculation/noncompaction (LVHT) is frequently associated with neuromuscular disorders (NMDs) and electrocardiographic (ECG) abnormalities. The prognostic relevance of newly developed ECG abnormalities in LVHT and its dependency on NMD is largely unknown. Aim of the following retrospective cohort study in LVHT patients was thus to assess the development of new ECG abnormalities and its dependency on NMD and survival. METHODS: Included were patients in whom (a) LVHT was diagnosed between 1995 and 2011, (b) baseline ECG recordings (bECG), and (c) follow-up ECG recordings (fECG) were available...
November 2014: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/24928815/inferior-quality-of-care-and-outcomes-for-acute-coronary-syndrome-with-left-anterior-hemiblock
#20
EDITORIAL
C P Gale, A John Camm
No abstract text is available yet for this article.
September 15, 2014: Heart: Official Journal of the British Cardiac Society
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