A Feasibility Study on Prediction of an ICD Shock by ICD-derived Data

PREDICTion of Implantable-Cardioverter Defibrillator Shock Study

The primary hypothesis is that an ICD shock may be predicted days in advance by a combined score derived from different data obtainable from the ICD

Inclusion Criteria:

1. Age ≧ 18 and ≦ 80
2. Patients have documented spontaneous and sustained ventricular arrhythmias in the last six months prior to the enrollment
3. Patients who are in sinus rhythm, have dual-chamber ICD or CRT-D implanted at least one month before enrollment
4. Patients who are in atrial fibrillation, have single-chamber ICD or CRT-D implanted at least one month before enrollment
5. Patients who are compliant to CareLink follow-up

Exclusion Criteria:

1. Patients who are pregnant
2. Patients who are incapable of giving consent to the study
3. Patients who have a life-expectancy of less than 2 years