Why the study?
Does increasing QRS duration predict cardiac mortality in patients with right bundle branch block?
Does increasing QRS duration predict cardiac mortality in patients with right bundle branch block?
Increasing QRS duration is an independent predictor of cardiac mortality in patients with right bundle branch block, adding prognostic value to the EKG finding.
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QRS prolongation was associated with cardiac death in RBBB; hypothesis-generating and requires prospective validation before guiding care.
Adesanya et al. (2008) studied this question.
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