His-Bundle Corrective Pacing in Heart Failure
The investigators aim to prospectively evaluate the efficacy and mechanism of benefit of His-bundle pacing enhanced cardiac resynchronization therapy (His-CRT) vs. cardiac resynchronization therapy (BIV-CRT) in patients with heart failure and right bundle branch block (RBBB).
Age 18 years or older (no upper age limit) [+4]
Unable to obtain most recent imaging data from echocardiogram within 1 year prio... [+5]