Does the presence of LBBB and QRS duration ≥150 ms improve outcomes in older patients with heart failure receiving CRT-D compared to other QRS morphologies?
In older patients receiving CRT-D in routine clinical practice, the presence of LBBB with a QRS duration ≥150 ms is associated with better survival and fewer readmissions compared to narrower QRS or non-LBBB morphologies.
Among fee-for-service Medicare beneficiaries undergoing CRT-D implantation in clinical practice, LBBB and QRS duration of 150 ms or greater, compared with LBBB and QRS duration less than 150 ms or no LBBB regardless of QRS duration, was associated with lower risk of all-cause mortality and of all-cause, cardiovascular, and heart failure readmissions.
Peterson et al. (Wed,) studied this question.