Here's a comprehensive article on 'Tree Branch to Toca Block: Understanding Right Bundle Branch Block':

When it comes to understanding cardiac rhythms and diagnosing arrhythmias, cardiologists rely heavily on electrocardiography (ECG). One common type of arrhythmia is right bundle branch block, also known as RBBB. In this article, we'll explore the electrophysiology and ECG criteria for RBBB, as well as its hallmark features.

Electrophysiology of Right Bundle Branch Block

RBBB occurs when there's a delay or blockage in the electrical impulse as it travels from the left ventricle to the right ventricle through the right bundle branch. This delay can be caused by anatomical or functional dysfunction in the right bundle branch, which results in the electrical impulse being blocked.

The slow spread of the impulse will result in a slow (and abnormal) activation of the right ventricle, leading to a bizarre and prolonged QRS complex on ECG. The hallmark features of RBBB include:

• QRS duration ≥0.12 seconds

• Large R'-wave in V1/V2

• Broad and deep S-wave in V5/V6

These characteristic changes in the QRS complex are a result of the electrical impulse spreading slowly through the ventricles, leading to abnormal depolarization of the right ventricle.

ECG Criteria for Right Bundle Branch Block

In order to diagnose RBBB on an ECG, cardiologists look for these key features:

• The presence of a prolonged QRS complex (≥0.12 seconds)

• A large R'-wave in V1/V2

• A broad and deep S-wave in V5/V6

Figure 2 illustrates the difference between a normal ECG, an RBBB, and a left bundle branch block (LBBB).

Right bundle branch block is a common type of arrhythmia that can be diagnosed using electrocardiography. Understanding the electrophysiology and ECG criteria for RBBB is crucial for accurate diagnosis and treatment. By recognizing the hallmark features of RBBB, cardiologists can identify this condition and provide appropriate care to patients.

Tree branch toca block