Ads
related to: right bundle branch block arrhythmia- Irregular Heartbeats
Access Our Free Treatment Guide.
Learn About Irregular Heartbeats.
- Ablation for AFib
Access Our AFib Treatment Guide.
Learn More About Ablation for Afib.
- Living With AFib
Free Atrial Fibrillation Guide.
Learn More About AFib Symptoms.
- Arrhythmia
Free Arrhythmia Treatment Guide.
Learn More About Arrhythmia.
- Irregular Heartbeats
Search results
Results from the WOW.Com Content Network
A right bundle branch block (RBBB) is a heart block in the right bundle branch of the electrical conduction system. [1] During a right bundle branch block, the right ventricle is not directly activated by impulses traveling through the right bundle branch. However, the left bundle branch still normally activates the left ventricle.
A bundle branch block can be diagnosed when the duration of the QRS complex on the ECG exceeds 120 ms. A right bundle branch block typically causes prolongation of the last part of the QRS complex and may shift the heart's electrical axis slightly to the right.
Bifascicular block is characterized by right bundle branch block with left anterior fascicular block, or right bundle branch block with left posterior fascicular block on electrocardiography. Complete heart block could be the cause of syncope that is otherwise unexplained if bifascicular block is seen on electrocardiography. [1]
Sinus rhythm (rate = 100/min) with 3:2 and 2:1 Type II AV block; right bundle branch block Sinus tachycardia with complete AV block and resulting junctional escape. Following the path of the electrical signals, the places where conduction can be blocked give rise to different kinds of heart blocks:
JET in a 2-month-old girl following cardiac surgery. In this case the right bundle branch block was present during tachycardia and during normal sinus rhythm. JET is most commonly diagnosed using a 12-lead ECG. The appearance is usually of a tachycardia with rapid, regular ventricular rates of 170-260 beats per minute. [6]
Bifascicular block is a combination of right bundle branch block and either left anterior fascicular block or left posterior fascicular block. Conduction to the ventricle would therefore be via the remaining fascicle. The ECG will show typical features of RBBB plus either left or right axis deviation. [7] [8]
An EKG of a 25-year-old male. Intraventricular conduction delays (IVCD) are conduction disorders seen in intraventricular propagation of supraventricular impulses resulting in changes in the QRS complex duration or morphology, or both. IVCD can be caused by abnormalities in the structures of bundle of His, Purkinje fibers or ventricular myocardium.
When a bundle branch or their fascicles becomes injured (by underlying heart disease, myocardial infarction, or cardiac surgery), it may cease to conduct electrical impulses appropriately, resulting in altered pathways for ventricular depolarization. This condition is known as a bundle branch block. [3]
Ads
related to: right bundle branch block arrhythmia