
A post-hoc analysis of the ISCHEMIA and ISCHEMIA-CKD trials investigated the impact of bundle branch blocks (RBBB and LBBB) on cardiovascular outcomes in patients with chronic coronary syndrome. Over a median follow-up of 3.1 years, RBBB and LBBB were associated with increased cardiovascular death compared to a narrow QRS complex, with adjusted hazard ratios of 1.59 and 1.83, respectively. Despite similarities in baseline characteristics and symptom severity, the study highlights the elevated risk posed by these conduction abnormalities in this patient population.
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