Dear Doctor K: I recently had an ECG that showed that I have a “left bundle branch block.” What does this mean? Dear Reader: When your heart beats, it does so in response to electrical signals. Your ...

LBBB is linked to electrical abnormalities, causing inefficient heart pumping, dilation, and systolic dysfunction. The study found LBBB associated with increased heart failure risk, surpassing other ...

The findings suggest that use of the pacing technique during CRT should be reserved for expert operators, at least for now.

New-onset LBBB following TAVR is associated with increased 1-year mortality, rehospitalization, and permanent pacemaker implantation.