The purpose of the registry is to assess workload of a Home Monitoring based follow up for Biotronik implantable cardioverter defibrillators (ICD) and cardiac resynchronization therapy defibrillators (CRTD) patients.

EP unit device clinic is a very busy clinic. Every 6 month the patients arrive for device follow up where the device parameters, patient condition and arrhythmic events are being reviewed, and reprogramming of the device (if needed) is done. Average net time of patient's stay in the clinic is between 30-45 minutes.

Patients implanted with the Lumax device family allows for a better automated follow up procedure via remote management (Home Monitoring).

Inclusion Criteria:

• Approved indication for ICD or CRTD.
• Implanted with or replaced with a Biotronik Lumax device.
• Patient is willing and able to sign consent form.
• Willing and able to attend clinic visits and follow up schedule.
• Transmission of more than 80% at 3-month FU.
• Patient older than 18 years.

Exclusion Criteria:

• No indication for ICD or CRTD implant.
• Life expectancy shorter than 12 months.
• Pregnancy.
• Participation in other clinical studies.

ICD or CRTD implanted patient