Key result
Isolated LBBB is linked to reduced peak VO2 at ~88% of predicted despite active lifestyles.
Why the study?
Although LBBB is associated with adverse cardiovascular events, the effect of isolated LBBB on maximal functional capacity is not well characterized.
Does isolated left bundle branch block reduce maximal functional capacity in adults compared to healthy population-derived predicted values?
Observational (n=27)
Yes
Does isolated left bundle branch block reduce maximal functional capacity in adults compared to healthy population-derived predicted values?
Adults with isolated LBBB exhibit reduced maximal functional capacity compared to predicted values, despite lacking structural cardiac disease and maintaining an active lifestyle.
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Isolated LBBB may reduce exercise capacity despite preserved LVEF and active lifestyle; leaves open need for larger matched studies before clinical implications.
Palau et al. (2023) conducted an observational in Isolated left bundle branch block (n=27). Isolated left bundle branch block vs. Healthy population-derived predicted values was evaluated on Maximal functional capacity according to population-derived predicted values of peak oxygen consumption (pp-peakVO2). Adults with isolated left bundle branch block demonstrated reduced maximal functional capacity (median predicted peak oxygen consumption 88%) despite a moderate to highly active lifestyle.
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