نتایج جستجو برای: left bundle branch block

تعداد نتایج: 525741  

2013
Jane Caldwell Kevin Michael Christopher Simpson Pablo A Chiale Adrian Baranchuk J. M. Ramos Mejia

An 83 year old lady was highly symptomatic from paroxysmal Atrial Fibrillation (AF) despite numerous antiarrhythmic and rate-limiting medications. Given her preserved left ventricular function, a pace and ablate strategy was pursued. Ablation of the AV node proved challenging requiring 2 procedures with apparently stable AV block and regular escape at 40bpm after the first sitting. Persistent R...

Journal: :British heart journal 1972
G M Ziady K A Hallidie-Smith J F Goodwin

was common (49%), and evidence is produced which suggests that it is probably the result of the ventriculotomy rather than direct trauma to the right bundle. Right bundle-branch block with left anterior hemiblock was less common (II%). Right bundle-branch block with left anterior hemiblock, especially if associated with a prolonged PR interval (trifascicular block), may predispose to complete a...

Journal: :the journal of tehran university heart center 0
ali kazemisaeid tehran heart center, tehran university of medical sciences, tehran, iran. marziyeh pakbaz tehran heart center, tehran university of medical sciences, tehran, iran. ahmad yaminisharif tehran heart center, tehran university of medical sciences, tehran, iran. gholamreza davoodi tehran heart center, tehran university of medical sciences, tehran, iran. masoumeh lotfi-tokaldany tehran heart center, tehran university of medical sciences, tehran, iran. elham hakki-kazazi tehran heart center, tehran university of medical sciences, tehran, iran.

background: isolated right bundle branch block (rbbb) is a common finding in the general population. the atrioventricular node (avn) artery contributes to the blood supply of the right bundle branch. our hypothesis was that the anatomy of the avn artery and the pattern of dominancy differ between subjects with and without rbbb. methods: w e retrospectively studied the coronary angiography of 92...

Journal: :Japanese heart journal 1985
T Tsutsumi K Izumo S Sekiya K Harumi

Vectorcardiograms of paced and unpaced beats were recorded from 18 patients with implanted pacemakers to investigate the characteristics of post-pacing T inversions. The intraventricular conduction during sinus rhythm of unpaced beats was normal in 13 of 18 patients and abnormal in the other 5 (RBBB in 3, LBBB in 2). The directions of the maximum QRS vector in paced beats (max QRSp.V) and maxim...

Journal: :Circulation. Arrhythmia and electrophysiology 2014
Leonidas Tzogias Leonard A Steinberg Andrew J Williams Kent E Morris William J Mahlow Richard I Fogel Jeff A Olson Eric N Prystowsky Benzy J Padanilam

BACKGROUND Definitive diagnosis of bilateral bundle-branch delay/block may be made when catheter-induced right bundle-branch block (RBBB) develops in patients with baseline left bundle-branch (LBB) block. We hypothesized that a RBBB pattern with absent S waves in leads I and aVL will identify bilateral bundle-branch delay/block. METHODS AND RESULTS Fifty patients developing transient RBBB pat...

Journal: :Circulation 1982
S A Biliack P Denes

The mechanism of origin of ventricular premature depolarizations (VPDs) is explained by automaticity or reentry. We studied three patients with intermittent left bundle branch block (LBBB) and unifocal VPDs of right bundle branch block (RBBB) morphology (assumed left ventricular origin). We examined the effect of different types of intraventricular conduction on the coupling intervals of the VP...

Journal: :Collegium antropologicum 2012
Ante Mandić Monika Tomić Bozo Petrov Zeljko Romić

Atrial fibrillation is one of the most frequent arrhythmias diagnosed in clinical practice and it is also relatively common in dialysis patients. Atrioventricular and intraventricular conduction disturbances are less investigated in hemodialysis patients and data about their prevalence are insufficient. The objective of this study was to determine the prevalence of atrial fibrillation, atrioven...

Journal: :Bio-medical materials and engineering 2015
Jianli Yang Yang Bai Guojun Li Ming Liu Xiuling Liu

Premature ventricular contraction (PVC) is one of the most serious arrhythmias. Without early diagnosis and proper treatment, PVC can result in significant complications. In this paper, a novel feature extraction method based on a sparse auto-encoder (SAE) and softmax regression (SR) classifier was used to differentiate PVCs from other common Non-PVC rhythms, including normal sinus (N), left bu...

2017
Krishna Kumar Mohanan Nair Narayanan Namboodiri Sreevilasam Pushpangadhan Abhilash Ajitkumar Valaparambil

A 42-year-old woman was referred for radiofrequency catheter ablation of narrow QRS tachycardia that was terminated with intravenous adenosine. Baseline twelve-lead ECG was normal during sinus rhythm and transthoracic echocardiography demonstrated no evidence of structural heart disease. The electrophysiological study showed a normal AH interval of 114 ms and HV interval of 37 ms during sinus r...

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