Mapping and Pacing of the His Bundle for Heart Failure Patients With Left Bundle Branch Block

Exclusion Criteria

• •1. Patients have non-specific intraventricular conduction delay or right bundle branch block
• •2. Previously implanted cardiac devices with three or more permanent leads
• •3. History of aortic valve repair or replacement
• •4. History of tricuspid valve replacement
• •5. Pregnant or nursing subjects and those who plan pregnancy during the clinical investigation follow-up period.
• •6. Recent (\< 3 months) myocardial infarction, ablation, electrolyte imbalance, or any condition within the last 90 days that would contraindicate for pacemaker or CRT implant in the opinion of the investigator
• •7. Presence of other anatomic or comorbid conditions, or other medical, social, or psychological conditions that, in the investigator's opinion, could limit the subject's ability to participate in the clinical investigation or to comply with follow-up requirements, or impact the scientific soundness of the clinical investigation results.