title: The PR interval and cardiac resynchronization therapy outcomes: considering confounding, mediation, and effect modification.
authors.forename: Gregory M
authors.initials: GM
authors.lastname: Marcus
mesh_terms: D001145:Arrhythmias, Cardiac / Q000628:therapy*; D054537:Atrioventricular Block / Q000628:therapy*; D058406:Cardiac Resynchronization Therapy / Q000379:methods*; D009202:Cardiomyopathies / Q000628:therapy*; D017147:Defibrillators, Implantable; D005260:Female; D006333:Heart Failure / Q000401:mortality*; D006801:Humans; D008297:Male