The purpose of this observational study is to collect data regarding the population of patients implanted with St. Jude Medical ICD.

The purpose of this observational study is to collect data regarding the population of patients implanted with a St. Jude Medical ICD. Data regarding Slow Ventricular Tachycardia Episodes, Atrial Fibrillation Episodes and the devices programmed parameters will be collected during two years after the implant.

Inclusion Criteria:

• Patient has been implanted with a St Jude Medical ICD, mono,bicameral or cardiac resynchronization therapy - Defibrillator (CRT-D) according the American College of Cardiology (ACC), American Heart Association (AHA), National Standards for Physical Education (NASPE) guidelines. (min. 24 hours - max. 2 months)
• Patient has signed the study specific Informed consent document.
• Patient is older than 18 years of age

Exclusion Criteria:

• Patient has a permanent Atrial Fibrillation
• Patient has a documented slow ventricular Tachycardia Episodes previous to the ICD implant.
• Patient not programed with a ventricular Tachycardia (VT) zone upper than 120 bpm.
• Patient requires cardiac resynchronization
• Patient has Brugada Syndrome
• Patient has long QT Syndrome
• Patient has a device replacement;
• Patient is pregnant or nursing
• Patient is unable to attend the follow-up visits

Patients implanted with a St. Jude Medical ICD

All patients

2 years

All Adverse Events (AE) in the study were classified as:

• Serious AE
• Serious Device Related AE
• Unsuspected Serious Device Related AE
• Non-Serious AE
• Non-Serious Device Related AE

There is not enough information available for a more detailed classification