• Re-hospitalization and ED visits for cardiac causes, unscheduled clinic visits for device-related issues, medications, patient logs, patients' level of satisfaction with their device care at baseline, 6 months, and 12 months. [ Time Frame: 12 months ] [ Designated as safety issue: No ]
  

• Health-related quality of life at baseline, 6 months, and 12 months. Health utilization costs incurred during the study period. [ Time Frame: 12 months ] [ Designated as safety issue: No ]
  

Sudden cardiac death (SCD), usually due to a ventricular tachyarrhythmia, is the most common cause of death in the United States. The implantable cardioverter defibrillator (ICD) has been shown to improve the survival of patients with a history of a heart attack and a weak heart (functioning at 30% or less) and those with symptomatic congestive heart failure symptoms (hearts functioning at 35% or less). Thus, the number of patients who will require ICD therapy is expected to rise exponentially over the next several years. To facilitate the follow-up of patients with ICDs, device companies have launched systems for remote monitoring of these devices. One such system is the Medtronic Carelink Monitor. Although this system has been proven in a multicenter, prospective study to be easy to use, it is not known whether this monitor results in improved patients' outcomes and satisfaction and in reduced healthcare costs.

Comparison: Patient outcomes, costs, and satisfaction will be evaluated, comparing patients assigned to follow-up using the Medtronic Carelink Monitor versus quarterly visits to an outpatient clinic.

Inclusion Criteria:

• 18 years of age or older
• Must have an ICD with or without CRT for an approved indication
• Must be planning to have their devices followed-up at Duke
• Must have a telephone (land line)
• Willing and able to provide informed consent.

Exclusion Criteria:

• 18 years of age or younger
• No telephone with land line
• Unable to provide informed consent.