ECG කියවමු. 3 කොටස.LBBB සහ RBBB By Dr Dinusha

Left Bundle Branch Block (LBBB) and Right Bundle Branch Block (RBBB) are cardiac conduction abnormalities that affect the electrical pathways in the heart, specifically the bundle branches of the His-Purkinje system. These conditions are typically identified on an electrocardiogram (ECG) and can be indicative of underlying cardiac issues. Here's an overview of LBBB and RBBB:
Left Bundle Branch Block (LBBB):
Description:
LBBB occurs when there is a delay or blockage in the electrical conduction through the left bundle branch.
ECG Characteristics:
QRS Complex: The QRS complex is widened (usually greater than 0.12 seconds) and has a distinctive appearance.
ST-T Changes: Secondary changes may be seen in the ST segment and T wave due to altered ventricular depolarization.
Clinical Significance:
LBBB can be associated with various cardiac conditions, such as structural heart disease, coronary artery disease, or cardiomyopathy.
It may be a marker of increased risk for adverse cardiac events.
Diagnosis and Management:
Diagnosis involves a thorough evaluation of the underlying cause, often including echocardiography and other cardiac imaging.
Treatment is directed at managing the underlying condition contributing to LBBB.
Right Bundle Branch Block (RBBB):
Description:
RBBB occurs when there is a delay or blockage in the electrical conduction through the right bundle branch.
ECG Characteristics:
QRS Complex: The QRS complex is widened (usually greater than 0.12 seconds) and has a characteristic appearance with an extra "bump" or "rabbit ear" in the right precordial leads (V1 and V2).
ST-T Changes: Secondary changes may be seen in the ST segment and T wave.
Clinical Significance:
RBBB can be associated with conditions such as pulmonary hypertension, congenital heart disease, or certain cardiomyopathies.
It may be a sign of an underlying structural issue in the right side of the heart.
Diagnosis and Management:
As with LBBB, diagnosis involves a comprehensive evaluation to determine the cause of RBBB.
Management is directed at addressing the underlying condition contributing to RBBB.
Important Considerations:
Bundle Branch Blocks in Healthy Individuals:
In some cases, bundle branch blocks may be present in individuals without underlying heart disease. These are often termed "isolated" or "benign" bundle branch blocks and may not require specific treatment.
Clinical Evaluation:
The presence of LBBB or RBBB should be evaluated in the context of the patient's clinical presentation, symptoms, and medical history to determine the appropriate course of action.
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