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Left bundle branch block

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https://www.readbyqxmd.com/read/28630172/role-of-his-refractory-premature-ventricular-complexes-in-the-differential-diagnosis-of-a-left-bundle-branch-block-morphology-tachycardia
#1
REVIEW
Shiv Bagga, Parin J Patel, Eric N Prystowsky, Benzy J Padanilam
No abstract text is available yet for this article.
June 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28630171/distinctive-left-ventricular-activations-associated-with-ecg-pattern-in-heart-failure-patients
#2
Nicolas Derval, Josselin Duchateau, Saagar Mahida, Romain Eschalier, Frederic Sacher, Joost Lumens, Hubert Cochet, Arnaud Denis, Xavier Pillois, Seigo Yamashita, Yuki Komatsu, Sylvain Ploux, Sana Amraoui, Adlane Zemmoura, Philippe Ritter, Mélèze Hocini, Michel Haissaguerre, Pierre Jaïs, Pierre Bordachar
BACKGROUND: In contrast to patients with left bundle branch block (LBBB), heart failure patients with narrow QRS and nonspecific intraventricular conduction delay (NICD) display a relatively limited response to cardiac resynchronization therapy. We sought to compare left ventricular (LV) activation patterns in heart failure patients with narrow QRS and NICD to patients with LBBB using high-density electroanatomic activation maps. METHODS AND RESULTS: Fifty-two heart failure patients (narrow QRS [n=18], LBBB [n=11], NICD [n=23]) underwent 3-dimensional electroanatomic mapping with a high density of mapping points (387±349 LV)...
June 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28627977/masquerading-bundle-branch-block-as-a-presenting-manifestation-of-complete-atrioventricular-block-that-caused-syncope
#3
Zhenyu Jiao, Ying Tian, Xinchun Yang, Xingpeng Liu
A 59-year-old male patient was admitted with the main complaints of stuffiness and shortness of breath. An ECG from precordial leads on admission showed masquerading bundle branch block. Syncope frequently occurred after admission. During syncope episodes, ECG telemetry showed that the syncope was caused by intermittent complete atrioventricular block, with the longest RR interval lasting for 4.36 s. At the gap of syncope, ECG showed complete right bundle branch block accompanied by alternation of left anterior fascicular block and left posterior fascicular block...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28624712/classification-of-ecg-heartbeats-using-nonlinear-decomposition-methods-and-support-vector-machine
#4
Kandala N V P S Rajesh, Ravindra Dhuli
Classifying electrocardiogram (ECG) heartbeats for arrhythmic risk prediction is a challenging task due to minute variations in the amplitude, duration and morphology of the ECG signal. In this paper, we propose two feature extraction approaches to classify five types of heartbeats: normal, premature ventricular contraction, atrial premature contraction, left bundle branch block and right bundle branch block. In the first approach, ECG beats are decomposed into intrinsic mode functions (IMFs) using ensemble empirical mode decomposition (EEMD)...
June 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28612907/safety-and-efficacy-of-cryoablation-without-the-use-of-fluoroscopy
#5
Edward Kozluk, Dariusz Rodkiewicz, Agnieszka Piątkowska, Grzegorz Opolski
BACKGROUND: Development of electroanatomical systems make it possible to perform ablations without the use of fluoroscopy. The aim of this study was to evaluate the efficacy and safety of cryoablation procedures without the use of fluoroscopy. METHODS: The study group consisted of 45 patients (14 female; age 36 ± 15 years) treated with cryoablation using the EnSite electroanatomical system: 10 with ventricular extrasystoly from the right ventricle, 6 with the arrhythmogenic site near the left coronary artery, 17 patients with Wolff-Parkinson-White syndrome (WPW), 2 patients with atrioventricular nodal reentrant tachycardia (AVNRT) type 2, 7 patients with AVNRT type 1, 3 patients with atrial tachycardia...
June 14, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28608184/assessment-of-left-ventricular-contraction-patterns-using-gated-spect-mpi-to-predict-cardiac-resynchronization-therapy-response
#6
Ningchao Tao, Yuanhao Qiu, Haipeng Tang, Zhiyong Qian, Hongping Wu, Rui Zhu, Yao Wang, Xiaofeng Hou, Weihua Zhou, Jiangang Zou
BACKGROUND: The U-shaped left ventricular (LV) contraction pattern, identified by MRI or echocardiography, is associated with improved CRT response. Gated SPECT MPI can measure both myocardial viability and mechanical dyssynchrony in a single scan. The aim of this study is to examine the relationship of the LV contraction pattern and the response of CRT in patients with left bundle branch block (LBBB). METHODS: Fifty-eight patients who met CRT guidelines and who had pre-CRT MPI were enrolled...
June 12, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28606233/-changes-in-electrocardiographic-parameters-in-children-with-complete-left-bundle-branch-block-early-after-transcatheter-closure-of-ventricular-septal-defect
#7
Li Wei, Yong-Yi Lu, Yi-Min Hua, Kai-Yu Zhou, Qiang-Hua Ye, Chuan Wang, Xiao Wang, Song Yan, Ju-Fang Liu
OBJECTIVE: To observe the changes in electrocardiographic parameters in children with complete left bundle branch block (CLBBB) after the transcatheter closure of simple ventricular septal defect (VSD). METHODS: A total of 21 children with CLBBB early after transcatheter closure of perimembranous VSD were recruited. Another 21 children without any type of arrhythmia after transcatheter closure of perimembranous VSD were enrolled as the control group. The sex, age, and the size of occluder were matched between the two groups...
June 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28605034/population-based-values-and-abnormalities-of-the-electrocardiogram-in-the-general-dutch-population-the-lifelines-cohort-study
#8
M Yldau van der Ende, Joylene E Siland, Harold Snieder, Pim van der Harst, Michiel Rienstra
BACKGROUND: Our aim is to present average values and prevalence of electrocardiographic (ECG) abnormalities among the general Dutch population in the LifeLines Cohort. HYPOTHESIS: The ECG values previously studied in the Caucasian population of smaller cohorts will be confirmed with ECG data from LifeLines. METHODS: ECG data of 152 180 individuals age 18 to 93 years were available. Individuals with cardiovascular risk factors were excluded to analyze the healthy population...
June 12, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28603826/differences-between-idiopathic-and-ischemic-dilated-cardiomyopathy
#9
Sana Fennira, Ihsen Zairi, Zouhaier Jnifene, Mariem Lakhal, Sofiene Kammoun, Sondos Kraiem
BACKGROUND: Ischemic cardiomyopathy can be reversible after revascularization hence the interest of making systematic coronary angiography that remain an invasive procedure. AIM: To detect epidemiological, clinical and paraclinical differences between idiopathic and ischemic dilated cardiomyopathy to identify predictors of coronary artery disease and to evaluate the interest of making systematic coronary angiography within the etiological check-up of dilated cardiomyopathy...
August 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/28600094/cardiac-resynchronization-therapy-for-heart-failure
#10
REVIEW
Amole Ojo, Sohaib Tariq, Prakash Harikrishnan, Sei Iwai, Jason T Jacobson
Cardiac resynchronization therapy (CRT) has emerged as a valued nonpharmacologic therapy in patients with heart failure, reduced ejection fraction (EF), and ventricular dyssynchrony manifest as left bundle branch block. The mechanisms of benefit include remodeling of the left ventricle leading to decreased dimensions and increased EF, as well as a decrease in the severity of mitral regurgitation. This article reviews the rationale, effects, and indications for CRT, and discusses the patient characteristics that predict response and considerations for nonresponders...
July 2017: Interventional cardiology clinics
https://www.readbyqxmd.com/read/28592851/left-ventricular-hemodynamic-forces-as-a-marker-of-mechanical-dyssynchrony-in-heart-failure-patients-with-left-bundle-branch-block
#11
Jonatan Eriksson, Jakub Zajac, Urban Alehagen, Ann F Bolger, Tino Ebbers, Carl-Johan Carlhäll
Left bundle branch block (LBBB) causes left ventricular (LV) dyssynchrony which is often associated with heart failure. A significant proportion of heart failure patients do not demonstrate clinical improvement despite cardiac resynchronization therapy (CRT). How LBBB-related effects on LV diastolic function may contribute to those therapeutic failures has not been clarified. We hypothesized that LV hemodynamic forces calculated from 4D flow MRI could serve as a marker of diastolic mechanical dyssynchrony in LBBB hearts...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28588840/additional-coronary-sinus-shocking-lead-as-rescue-therapy-after-multiple-internal-and-external-defibrillation-failures
#12
Samuel Chauveau, Arnaud Dulac, Laurent Sebbag, Elodie Morel, Philippe Chevalier
High defibrillation threshold (DFT) and defibrillation failure can lead to intractable ventricular arrhythmias. Additional coronary sinus coil is an effective strategy to achieve marked reduction in DFT. However, physicians should retain this might prevent future coronary sinus lead placement in case the patient would develop complete left bundle branch block.
June 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28586614/frequency-indications-and-complications-of-pulmonary-artery-catheter-insertion-in-adult-open-heart-surgery-patients-of-a-tertiary-care-hospital
#13
Syed Shabbir Ahmed, Mohammad Irfan Akhtar, Rehana Kamal
OBJECTIVE: Patients presenting for cardiac surgery have unstable cardiovascular disease and haemodynamics with multiple coexisting diseases. Optimal monitoring in the perioperative period is very important for best perioperative outcome. The introduction of the flow-directed pulmonary artery catheter (PAC) into clinical practice is one of the most important and popular advances in the field of cardiac anaesthesia. The objective of the study was to determine the frequency, indications and complications of pulmonary artery catheter insertion in adult open-heart surgery patients...
October 2016: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28585685/pulmonary-artery-a-pivotal-site-for-catheter-ablation-in-idiopathic-rvot-ventricular-arrhythmias
#14
REVIEW
Chunmiao Wang, Yawen Zhang, Fangde Hong, Ying Huang
In patients without associated myocardial diseases, characterized by left bundle branch block (LBBB) and inferior axis morphologies, repetitive idiopathic right ventricular tachycardias (VTs) and ventricular premature contractions (VPCs) typically arise from right ventricular outflow tract (RVOT). Accumulated evidences have shown that radiofrequency catheter ablation (RFCA) is a useful treatment for patients with RVOT ventricular arrhythmias (VAs). Interestingly, several medical centers have showed that pulmonary artery (PA) is a potential novel site for catheter ablation in RVOT-like VAs, particularly in patients where termination of RVOT VAs at the usual site fails...
June 6, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28571189/evaluation-of-ecg-abnormalities-in-patients-with-asymptomatic-type-2-diabetes-mellitus
#15
Sahil Gupta, Rajeev Kumar Gupta, Malini Kulshrestha, Rajib Ratna Chaudhary
INTRODUCTION: Diabetes Mellitus (DM) is the most common chronic disease. DM is considered a Cardiovascular Disease (CVD) risk equivalent. Its macrovascular complications are associated with two-fold increased risk of premature atherosclerotic CVD. Most of the diabetics with cardiovascular involvement are asymptomatic. Electro Cardio Graph (ECG) abnormalities are found to be predictors of silent ischaemia in asymptomatic persons. An abnormal ECG response is associated with statistically significant high risk for cardiac mortality and morbidity...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28567361/unexpected-evolution-of-a-non-stenotic-lesion-in-the-left-main-coronary-artery-of-a-patient-with-non-st-segment-elevation-myocardial-infarction
#16
Alexandru Florin Ispas, Lionel Mangin, Alexandru Paziuc, Loic Belle
A 72-year-old man was referred to our catheterization laboratory 48 hours after a non-ST-segment elevation myocardial infarction. His medical history included coronary artery disease (CAD) (percutaneous coronary intervention of the right coronary artery and chronic total occlusion of the circumflex artery), atrial fibrillation (AF), and chronic kidney disease. An electrocardiogram showed a pre-existent left bundle-branch block and the patient's maximum cardiac troponin concentration was 8.64 µg/L (upper limit of normal: 0...
June 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28566243/timing-of-onset-and-outcome-of-new-conduction-abnormalities-following-transcatheter-aortic-valve-implantation-role-of-balloon-aortic-valvuloplasty
#17
Francisco Campelo-Parada, Luis Nombela-Franco, Marina Urena, Ander Regueiro, Pilar Jiménez-Quevedo, María Del Trigo, Chekrallah Chamandi, Tania Rodríguez-Gabella, Vincent Auffret, Omar Abdul-Jawad Altisent, Robert DeLarochellière, Jean-Michel Paradis, Eric Dumont, François Philippon, Nicasio Pérez-Castellano, Rishi Puri, Carlos Macaya, Josep Rodés-Cabau
INTRODUCTION AND OBJECTIVES: Little is known about the timing of onset and outcome of conduction abnormalities (CA) following balloon-expandable transcatheter aortic valve implantation. The aim of this study was to examine the timing of CA and determine the impact of balloon aortic valvuloplasty (BAV) on the persistence of these abnormalities. METHODS: A total of 347 patients were included. Of these, 75 had a continuous electrocardiogram recording and a 6-lead electrocardiogram at each step of the procedure...
May 26, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28557338/coronary-sinus-lead-delay-index-for-optimization-of-coronary-sinus-lead-placement
#18
Mevlüt Koç, Onur Kaypakli, Gökhan Gözübüyük, Durmus Yıldıray Şahin
AIM: Optimization of coronary sinus (CS) lead position to the latest activated left ventricular (LV) area is important to increase cardiac resynchronization therapy (CRT) response. We aimed to detect the relationship between coronary sinus lead delay index (CSDI) and echocardiographic, electrocardiographic response to CRT treatment. METHODS: We prospectively included 137 consecutive patients with heart failure (HF) diagnosis, QRS ≥ 120 ms, left bundle branch block (LBBB), New York Heart Association score (NYHA) II-IV, LV ejection fraction (LVEF) <35% and scheduled for CRT (84 male, 53 female; mean age 65...
May 30, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28549996/effect-of-pr-interval-prolongation-on-long-term-outcomes-in-patients-with-left-bundle-branch-block-vs-non-left-bundle-branch-block-morphologies-undergoing-cardiac-resynchronization-therapy
#19
John Rickard, Mohammad Karim, Bryan Baranowski, Daniel Cantillon, David Spragg, W H Wilson Tang, Mark Niebauer, Richard Grimm, Kevin Trulock, Bruce Wilkoff, Niraj Varma
BACKGROUND: Although the influence of QRS duration (QRSd) and/or bundle branch block morphology on outcomes of cardiac resynchronization therapy (CRT) have been well studied, the effect of PR interval remains uncertain. OBJECTIVE: The purpose of this study was to evaluate the impact of PR prolongation (PRp) before CRT on long-term outcomes, specifically taking into account bundle branch block morphology and QRSd. METHODS: We extracted clinical data on consecutive patients undergoing CRT...
May 24, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28546456/electrocardiographic-predictors-of-heart-failure-with-reduced-versus-preserved-ejection-fraction-the-multi-ethnic-study-of-atherosclerosis
#20
Wesley T O'Neal, Matylda Mazur, Alain G Bertoni, David A Bluemke, Mouaz H Al-Mallah, Joao A C Lima, Dalane Kitzman, Elsayed Z Soliman
BACKGROUND: Several markers detected on the routine 12-lead ECG are associated with future heart failure events. We examined whether these markers are able to separate the risk of heart failure with reduced ejection fraction (HFrEF) from heart failure with preserved ejection fraction (HFpEF). METHODS AND RESULTS: We analyzed data of 6664 participants (53% female; mean age 62±10 years) from MESA (Multi-Ethnic Study of Atherosclerosis) who were free of cardiovascular disease at baseline (2000-2002)...
May 25, 2017: Journal of the American Heart Association
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