Right Bundle Branch Block: Causes & Reasons

Possible Causes for Right Bundle Branch Block

[…] axis of the QRS, transient S-T depression of leads II, III, and aVF, and transient right bundle branch block. 6. [rjoson.tripod.com]

V leads; (3) ST depressions in leads II, III, and aV F ; and (4) transitory right bundle-branch block. [ahajournals.org]

[…] axis deviation Right bundle branch block R:S ratio > 1 in V1 TWI in V1-3 in acute right heart strain S1 Q3 T3 in acute right heart strain Large P wave in II, III, aVF Arrhythmia [wikem.org]

Atrial Septal Defect

The impact of incomplete right bundle branch block (IRBBB) and ASD diameter (≥ 5 and KEYWORDS: Crochetage on R wave; Inferior leads; Pediatric; Secundum atrial septal defect [ncbi.nlm.nih.gov]

atrial fibrillation or right bundle branch block. [orpha.net]

EMAIL PRINT SAVE EMAIL SAVE An atrial septal defect should show a right bundle branch block, or RBBB ― sometimes incomplete ― on ECG. [healio.com]

Brugada Syndrome

[…] of adult subjects with right bundle branch block and ST elevation, Circulation, 1995, vol. 93 pg. 334 [31] Incidence and clinical significance of right bundle branch block [doi.org]

Right bundle branch block, persistent ST segment elevation and sudden cardiac death: a distinct clinical and electrocardiographic syndrome. A multicenter report. [jetem.org]

bundle branch block for comparison. [ncbi.nlm.nih.gov]

Ostium Primum Atrial Septal Defect

When a person is suspected of having an ASD based on the findings of an incomplete right bundle branch block with a rSr' or rSR', the frontal plane QRS should be examined. [en.wikipedia.org]

When you suspect a patient has an ASD based on the findings of an incomplete Right Bundle Branch Block with a rSr' or rSR' the next thing you should do is examine the frontal [ipfs.io]

The 12-lead ECG will show an incomplete right bundle branch block and left axis deviation (in contrast to the secundum ASD which has a right axis deviation). [healio.com]

Right Ventricular Hypertrophy

In contrast, when an incomplete right bundle branch block exists, the rSR' pattern is a relatively sensitive but nonspecific predictor of RVH. [ncbi.nlm.nih.gov]

This resembles, but is not, right bundle branch block (RBBB). Secondary ST-T changes are common in V1–V3. The ST-T segment is usually discordant to the QRS complex. [ecgwaves.com]

[…] often confused with partial right bundle branch block (PRBBB). [ncbi.nlm.nih.gov]

Ebstein Malformation

[…] as a prolonged PR-interval low amplitude QRS complexes in the right precordial leads atypical right bundle branch block T wave inversion in V1-V4 and Q waves in V1-V4 and [en.wikipedia.org]

Note the characteristic right bundle-branch block pattern with right ventricular hypertrophy. [doi.org]

ECG right atrial enlargement right bundle branch block may be incomplete or complete abnormal PR interval associated with the Wolff-Parkinson-White syndrome alternatively, [radiopaedia.org]

Acute Chagas Disease with Myocarditis

right bundle branch block, complete heart block, AV block Rule out myocardial infarction : loss of R wave and pathological Q wave specific to myocardial infarction, not [amboss.com]

bundle branch block with left anterior hemiblock) or 3) a group of 21 patients with the cardiac phase with left ventricular systolic dysfunction determined by ejection fraction [jcmr-online.biomedcentral.com]

Although there is no characteristic pattern in the ECG, these changes, especially right bundle-branch block, in isolation or associated with left anterior hemiblock in patients [revespcardiol.org]

Chagas Disease

The most common disorders include right bundle branch block alone or in association with left anterior fascicular block. [ncbi.nlm.nih.gov]

A woman (49 years) with Chagas' disease showed: ECG, right bundle-branch block and left anterior-superior fascicular block; V1 has unusual R > R', and elevated ST segment [ncbi.nlm.nih.gov]

She presented with impaired cardiac function during the acute phase (pericarditis and incomplete right bundle-branch block) that resolved favorably after benznidazole therapy [ncbi.nlm.nih.gov]

Acute Myocardial Infarction

BACKGROUND New-onset extreme right axis deviation and right bundle branch block (RBBB) are rare during acute myocardial infarction (AMI), and has only been reported in several [ncbi.nlm.nih.gov]

Right bundle branch block in anterior MI is an independent marker of poor prognosis; this is due to the extensive myocardial damage involved rather than the conduction disorder [lifeinthefastlane.com]

Cardiomyopathy

TAD = terminal activation duration, IRBBB = incomplete right bundle branch block, CRBBB = complete right bundle branch block. [hrcak.srce.hr]

bundle-branch block and right precordial ST-segment elevation accompanied by polymorphic ventricular tachycardia also have been reported in a small subpopulation of ARVC/ [web.archive.org]

Family history Confirmed at necroscopy or surgery Premature sudden death due to suspected ARVC RV = right ventricle, LV = left ventricle, RBBB = right bundle branch block, [hrcak.srce.hr]

Acute Myocarditis

It has also been described in a work the report of sequences of alternatively normal and Wenckebach beats with alternate and progressive right bundle branch block interpreted [ncbi.nlm.nih.gov]

Pulmonary Valve Stenosis

bundle branch block. [msdmanuals.com]

Right heart catheterization is indicated only when 2 levels of obstruction are suspected (valvular and infundibular), when clinical and echocardiographic findings differ, [msdmanuals.com]

[…] characterize the severity as Mild: Peak gradient < 36 mm Hg Moderate: Peak gradient 36 to 64 mm Hg Severe: Peak gradient > 64 mm Hg ECG may be normal or show RV hypertrophy or right [msdmanuals.com]

Hereditary ATTR Amyloidosis

An electrocardiogram showed atrial fibrillation with right bundle branch block. Echocardiography showed concentric LV hypertrophy. [jstage.jst.go.jp]

(290 ms) with right bundle branch block (RBBB) (Figure 8A). [frontiersin.org]

His electrocardiogram showed a right bundle branch block and left anterior fascicular block. [oatext.com]

Eisenmenger Syndrome

Age, atrial fibrillation, prolonged QRS duration, complete heart block, right atrial enlargement, right bundle branch block, increased right atrial pressure, impaired biventricular [mayoclinic.pure.elsevier.com]

[…] ischemia or strain, and incomplete right bundle branch block. [bmccardiovascdisord.biomedcentral.com]

[…] lead suggestive of ischemia or strain, and incomplete right bundle branch block (RBBB; Fig. 1). [bmccardiovascdisord.biomedcentral.com]

Cardiac Sarcoidosis

The first patient displayed no cardiac symptoms; the electrocardiogram showed an incidental right bundle branch block. [ncbi.nlm.nih.gov]

A 75-year-old woman with a history of sarcoidosis presenting with low cardiac output and complete right bundle-branch block underwent 4'-[methyl-C]-thiothymidine (4DST) PET [ncbi.nlm.nih.gov]

Electrocardiogram: Showed sinus rhythm with different degrees of AV block, included periods of complete AV block and right bundle branch block (RBBB)-like escape rhythm. [scmr.org]

Chronic Obstructive Pulmonary Disease

[…] deviation >110° without right bundle branch block; or some combination of these. [msdmanuals.com]

[…] deviation > 110 ° without right bundle branch block; or some combination of these. [merckmanuals.com]

Findings of right ventricular hypertrophy include an R or R′ wave as tall as or taller than the S wave in lead V1; an R wave smaller than the S wave in lead V6; right-axis [msdmanuals.com]

Amyloidosis

(21% were first degree blocks), and 14.5% presented bundle-branch block (in 9% right bundle-branch block and in 5.5% left bundle-branch block). [revespcardiol.org]

[…] of infarction on the echocardiogram) in 47% of the patients; 76% of the patients showed no conduction disorders, only 3% presented second or third degree atrioventricular blocks [revespcardiol.org]

TTR Amyloidosis with Cardiomyopathy

Half of the patients with SSA had right bundle branch block compared with only 1 of the 16 nonpaced patients with AL amyloidosis ( P = .01). [jamanetwork.com]

Comparisons of the remaining electrocardiograms revealed that left anterior fascicular block was significantly more common in patients with SSA than those with AL amyloidosis [jamanetwork.com]

Coronary Atherosclerosis

What is the function of coronary arteries? The coronary arteries supply blood flow to the heart, and when functioning normally, they ensure adequate oxygenation of the myocardium at all levels of cardiac activity. Constriction and dilation of the coronary arteries, governed primarily by local regulatory mechanisms[…] [cvphysiology.com]

Posterior Myocardial Infarction

Discussion Ventricular repolarization in right bundle branch block Right bundle branch block is an intra-ventricular conduction delay or block at the right bundle branch and [academic.oup.com]

Also, both patients had complete right bundle-branch block (RBBB) [old in patient 1, new in patient 2], the pattern of which was altered due to the associated PMI. [ncbi.nlm.nih.gov]

We present here a patient with the unusual combination of a newly developed right bundle branch block (RBBB) and an acute posterior myocardial infarction (MI). [ncbi.nlm.nih.gov]

Multifocal Atrial Tachycardia

bundle branch block. [ncbi.nlm.nih.gov]

The only differences between these two groups were incidence of cor pulmonale, and right axis deviation, right bundle branch block, pulmonale P in electrocardiogram. [ncbi.nlm.nih.gov]

Block Right Bundle Branch Block Left Bundle Branch Block Left Anterior Hemiblock Left Posterior Hemiblock Normal Sinus Rhythm Atrial Premature Depolarization Premature Atrial [play.google.com]

Heart Block

If the block is located in the right bundle branch, it is called right bundle branch block. [texasheart.org]

block, left bundle branch block, right bundle branch block, left anterior hemi-block or left posterior hemi-block) on electrocardiograms. [ncbi.nlm.nih.gov]

[…] second-degree block, third-degree block, left bundle branch block, right bundle branch block, left anterior hemi-block or left posterior hemi-block). [ncbi.nlm.nih.gov]

Anterior Myocardial Infarction

The recurrent myocardial infarction indicated right bundle branch block and first-degree atrioventricular block, making a clear diagnosis of complicated and interesting ECG [ncbi.nlm.nih.gov]

A concept generally accepted in clinical electrocardiography is the assumption that a right bundle branch block (RBBB) does not alter significantly the initial portion of [ncbi.nlm.nih.gov]

Patients with right bundle-branch block (RBBB) during an anterior ST-segment elevation acute myocardial infarction (AMI) are known to have a high risk for mortality. 1 In [circ.ahajournals.org]

Acute Massive Pulmonary Embolism

One patient with complete right bundle-branch block and another with normal conduction had a wide and fixed split second sound with a loud pulmonic component. [ncbi.nlm.nih.gov]

bundle branch block (RBBB), as a marker for a main pulmonary trunk embolus [4]. [tcmjmed.com]

bundle-branch block, anteroseptal ST elevation or depression, or anteroseptal T-wave inversion) Myocardial necrosis is defined as either of the following: —Elevation of troponin [emcrit.org]

Bidirectional Tachycardia

[…] in this case the bidirectional morphology of tachycardia was caused by alternating right and left bundle branch block-type patterns. [journals.sagepub.com]

The tachycardia had alternating right and left bundle branch block morphology on a beat-to-beat basis and was successfully eliminated by ablating the right and left bundle [ncbi.nlm.nih.gov]

They are both in a right bundle branch block pattern since they are upright in lead V1. [healio.com]

Lenegre Disease

Journal of the American College of Cardiology. 2001 Mar 1; [PubMed PMID: 11693753] [3] Patil AR, Risk of right bundle-branch block and complete heart block during pulmonary [statpearls.com]

Pseudo right bundle branch block Brugada syndrome Arrhythmogenic right ventricular cardiomyopathy [dimasyusuf.com]

Left bundle branch block masquerading as right bundle branch block. Am Heart J. 1954; 47(3): 383-393. Lenègre J. [litfl.com]

Ventricular Tachycardia

bundle branch block. [ncbi.nlm.nih.gov]

BACKGROUND: Left posterior fascicular ventricular tachycardia (LPF-VT) is frequently misdiagnosed as supraventricular tachycardia with aberrant right bundle branch block [ncbi.nlm.nih.gov]

[…] from the previous cardiac cycle, which results in a right bundle branch block pattern. [aclsmedicaltraining.com]

Incessant Infant Ventricular Tachycardia

The most common electrocardiographic (ECG) pattern (10 of 21) was right bundle branch block with left axis deviation, but other right and left bundle branch block patterns [ncbi.nlm.nih.gov]

Diagnostic methods The electrocardiogram (ECG) usually shows a type of right bundle branch block morphology and a superior axis, predicting a tachycardia origin in the posterior [orpha.net]

Bradyarrhythmia

We have described two elderly patients with preexisting cardiac disease (right bundle branch block) in whom persistent bradyarrhythmia followed sclerotherapy using 5% sodium [ncbi.nlm.nih.gov]

block 左脚ブロック left bundle branch block 完全左脚ブロック complete left bundle branch block 不完全左脚ブロック incomplete left bundle branch block 右脚ブロック right bundle branch block 完全右脚ブロック complete [jams.med.or.jp]

QRS (> 120 ms or .12 seconds or longer) Complete left bundle branch block Right bundle branch block and left posterior hemiblock Right bundle branch block and left anterior [slideplayer.com]

Third Degree Atrioventricular Block

Additionally, the patient presented with complete right bundle branch block during sinus rhythm. [ncbi.nlm.nih.gov]

Electrocardiography showed sinus rhythm with third degree atrioventricular block and complete right bundle branch block, and precordial leads ST segment elevation. [ncbi.nlm.nih.gov]

The wide QRS complexes are due to right bundle branch block. [ecgguru.com]