St. Jude Medical developed the Merlin.net™ Patient Care Network (Merlin.net™ PCN) to augment or replace routine scheduled in-clinic visits.

This investigation is designed with the hypothesis that detection of events (system integrity and diagnostic related) through Direct Alerts™ via Remote Monitoring allow clinicians an earlier opportunity to address and resolve events and may therefore improve patient care.

Inclusion Criteria:

• The patient meets ACC/AHA/ESC guidelines for implantable cardioverter defibrillator (ICD) or cardiac resynchronization therapy (CRT-D) device
• The patient is recently (≤2 weeks) implanted with a SJM device compatible with the Merlin.net™ PCN - (inclusive of upgrade from ICD to CRT-D or an implantable pulse generator change)
• The patient has a life expectancy of greater than 12 months (based on the physician's discretion).
• The patient is mentally capable to participate in the investigation (based on the physician's discretion).
• The patient is 18 years of age or older

Exclusion Criteria:

• The patient is being actively considered for cardiac transplantation.
• The patient has primary valvular disease that has not been corrected.
• The patient had a myocardial infarction within the last month
• The patient had unstable angina within the last month.
• The patient has had Coronary Artery Bypass Grafting (CABG) within the last month.
• The patient had a Percutaneous Coronary Angioplasty (PTCA) within the last month.
• The patient is pregnant.