Heart rhythm : the official journal of the Heart Rhythm Society
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Randomized Controlled Trial
Does cardiac resynchronization therapy provide unrecognized benefit in patients with prolonged PR intervals? The impact of restoring atrioventricular synchrony: an analysis from the COMPANION Trial.
The influence of PR prolongation on outcomes after cardiac resynchronization therapy (CRT) is uncertain. ⋯ PR prolongation may affect mortality and heart failure hospitalizations in patients with systolic dysfunction, heart failure, and wide QRS complexes. The effect of PR prolongation may be attenuated by CRT.