Bundle branch block

McAnulty, John H.; Rahimtoola, Shahbudin H.

doi:10.1016/0033-0620(84)90009-4

Cited by 52 publications

(10 citation statements)

References 126 publications

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“…Interestingly, the prognoses of patients with RBBB are variable, depending on the site of block within the right bundle [21, 22, 23]. In the case of a proximal RBBB, activation of the right ventricle through the septal fascicle of the left bundle branch (bypassing the area of block) can be significantly faster than that through endocardial ‘route’, resulting in reduction of the time period in the initial portion of the QRS complex that is unaffected by RBBB.…”

Section: Impact Of the Level Of Rbbb On Transseptal Conduction And Itmentioning

confidence: 99%

False-Negative and False-Positive ECG Diagnoses of Q Wave Myocardial Infarction in the Presence of Right Bundle-Branch Block

Gussak

Wright²,

Bjerregaard

et al. 2000

Cardiology

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Right bundle-branch block (RBBB) has not traditionally been seen as an obstacle to ECG diagnosis of Q wave myocardial infarction (MI) – in clinical electrocardiography and vectorcardiography – because this conduction disturbance is not believed to cause significant alterations in the spatial orientation of initial excitation wavefronts. In the era of large-scale clinical trials, however, where serial ECG analysis is among the major diagnostic tools in MI classification, both false-positive and false-negative diagnoses of MI in the presence of RBBB have become increasingly evident. Because of the limited detectability of Q wave MI by ECG in the presence of RBBB, the electrocardiographic finding of Q wave MI should not be regarded as an independent diagnostic tool. It is best to utilize independent corroboration to establish the diagnosis of transmural infarction when RBBB is present. Further investigations are warranted to better delineate sensitivity, specificity, and predictive value of Q wave MI in the presence of RBBB.

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Section: Impact Of the Level Of Rbbb On Transseptal Conduction And Itmentioning

confidence: 99%

False-Negative and False-Positive ECG Diagnoses of Q Wave Myocardial Infarction in the Presence of Right Bundle-Branch Block

Gussak

Wright²,

Bjerregaard

et al. 2000

Cardiology

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“…Bifascicular block (BFB), defined as left bundle branch block or right bundle branch block with anterior or posterior fascicular block, has a prevalence of 1–1.5% in an adult population [1,2,3]. Up to 25% of patients with BFB have a history of syncope [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Up to 25% of patients with BFB have a history of syncope [3,4,5]. A common cause of syncope in this population is transient high-degree atrioventricular (AV) block [6], but the intermittent nature of this arrhythmia sometimes makes it difficult to document.…”

Section: Introductionmentioning

confidence: 99%

Time Relation between a Syncopal Event and Documentation of Atrioventricular Block in Patients with Bifascicular Block: Clinical Implications

et al. 2006

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Background: Transient high-degree atrioventricular (AV) block is a common cause of syncope in patients with bifascicular block (BFB) but the intermittent nature of AV block makes ECG documentation a challenge. A sensitive and safe tool to investigate BFB patients with syncope would be a bradycardia-detecting pacemaker, which provides a possibility of studying the time relation between the index syncopal episode and the development of high-degree AV block. Methods: Twenty-seven patients with BFB and syncope were studied prospectively. All patients received a single-chamber ventricular-based pacemaker with bradycardia-detecting ability. A bradycardia episode was defined as a heart rate of <30 beats/min lasting ≧6 s. Results: During a median follow-up of 60 months, a bradycardia event was detected in 14 patients (52%), of whom 13 also had documented high-degree AV block on ECG. The median time between the syncopal episode and the first pacemaker-detected bradycardia event was 5 months and after an additional median time of 6 months, high-degree AV block was documented on the ECG. In 10 of 13 patients (77%) high-degree AV block was documented within 24 months of the syncopal episode corresponding to an annual incidence of 19% during the first 2 years of follow-up in the study population. Conclusion: In this group of BFB patients a syncopal episode was highly predictive of the development of high-degree AV block within 24 months, justifying pacemaker therapy without prior ECG verification.

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“…A particular form of IVCD is bifascicular block (BFB), defined as left bundle branch block (LBBB) or right bundle branch block (RBBB) with left anterior (LAFB) or left posterior fascicular block (LPFB), which has a prevalence of 1-1.5% in the adult population [8][9][10]. A mortality rate of 2-14% per year has been reported in an unselected BFB population, which is higher than in an age and sex matched population without BFB [3][4][5]11].…”

Section: Introductionmentioning

confidence: 99%

Long‐term prognosis in patients with bifascicular block – the predictive value of noninvasive and invasive assessment

Tabrizi

Rosenqvist

Bergfeldt

et al. 2006

Journal of Internal Medicine

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Bundle branch block

Cited by 52 publications

References 126 publications

False-Negative and False-Positive ECG Diagnoses of Q Wave Myocardial Infarction in the Presence of Right Bundle-Branch Block

False-Negative and False-Positive ECG Diagnoses of Q Wave Myocardial Infarction in the Presence of Right Bundle-Branch Block

Time Relation between a Syncopal Event and Documentation of Atrioventricular Block in Patients with Bifascicular Block: Clinical Implications

Long‐term prognosis in patients with bifascicular block – the predictive value of noninvasive and invasive assessment

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