The purpose of this study is to assess the effects of pacing-cardiac resynchronization therapy to a specific area of the heart called the His bundle (HIS-CRT), compared to biventricular pacemaker cardiac resynchronization therapy (BIV-CRT) on the heart’s function, as well as on ECG and echocardiography data collected during standard-of-care visits. Patients in this study will be undergoing scheduled cardiac resynchronization therapy (CRT) as part of their routine medical care for heart failure. Participants will be randomly assigned to 1 of 2 study groups: BIV-CRT or HIS-CRT. The differences between the groups are the position of the third lead of CRT, which may be positioned in 1 of 2 places: in an area called the coronary sinus for BIV-CRT, or a different area called the His bundle, for HIS-CRT. Procedures include completing a quality-of-life questionnaire and performing a 6-minute walk test.