A slurred S wave in leads I, V5, and V6, often referred to as a "rabbit ear" morphology due to its distinctive shape. An incomplete right bundle branch block represents a specific pattern observed on an electrocardiogram, indicating a delay in the electrical conduction pathway through the right bundle branch of the heart.
Decoding Right Bundle Branch Block Criteria: ECG Patterns and Key Features
Presence of an rSR' pattern in leads V1 and V2, where the initial small r wave is followed by a deep S wave and a second, taller R' wave. However, when identified in conjunction with other cardiac symptoms or risk factors, it may be associated with conditions such as pulmonary hypertension, atrial septal defects, or cardiomyopathies.
Management is primarily directed at addressing any identified underlying etiology, such as optimizing therapy for associated pulmonary or valvular diseases. Regular follow-up and monitoring of the ECG may be recommended to track any evolution of the conduction abnormality over time, ensuring that new developments are promptly identified.
Recognizing Right Bundle Branch Block Criteria on ECG
Waveform Characteristics in Specific Leads In lead V1, the positive deflection (r wave) is typically followed by a negative deflection (S), and then a final positive deflection (R'), creating the classic rSR' appearance. Understanding the Electrical Conduction System The heart's rhythmic contraction is governed by an intricate electrical conduction system that ensures coordinated pumping action.
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