From the Guidelines
When an RSR' complex (Right Bundle Branch Block) is present, it is characterized by a QRS duration ≥120 ms, an rsr', rsR', or rSR pattern in leads V1 or V2, and an S wave of greater duration than the R wave in leads I and V6. This definition is based on the 2019 ACC/AHA/HRS guideline on the evaluation and management of patients with bradycardia and cardiac conduction delay 1. The presence of RBBB can make it difficult to assess the presence of ischemia in leads V1-V3 due to common ST-T abnormalities in these leads, but new ST elevation or Q waves should prompt consideration of myocardial ischemia or infarction 1. Key characteristics of RBBB include:
- QRS duration ≥120 ms
- rsr', rsR', or rSR pattern in leads V1 or V2
- S wave of greater duration than the R wave in leads I and V6
- Normal R peak time in leads V5 and V6 but >50 ms in lead V1 It is essential to consider the clinical context and other ECG findings when evaluating a patient with RBBB, as the presence of this conduction abnormality can impact the interpretation of other ECG results. In patients with RBBB, the diagnosis of myocardial infarction can be more challenging, but concordant ST-segment elevation or a previous ECG can be helpful in determining the presence of acute MI 1. Overall, the presence of an RSR' complex (Right Bundle Branch Block) requires careful consideration of the patient's clinical presentation and other ECG findings to ensure accurate diagnosis and management.
From the Research
RSR' Complex (Right Bundle Branch Block)
There are no research papers to assist in answering this question, as the provided studies focus on Respiratory Syncytial Virus (RSV) and its treatment, rather than RSR' complex or Right Bundle Branch Block.
- The studies provided discuss various aspects of RSV, including its causes, symptoms, treatment, and prevention 2, 3, 4, 5, 6.
- None of the studies mention RSR' complex or Right Bundle Branch Block, which suggests that the provided evidence is not relevant to this topic.
- Further research would be needed to provide information on the effects of an RSR' complex (Right Bundle Branch Block).