Improving the diagnosis and management of cardiac rhythm disturbances remains a major challenge for physicians. Limitations of current cardiac arrhythmia monitoring using ECG, holters or event recorders are that these methods are non-continuous and/or automatic arrhythmia detection is often impossible. The Medtronic Reveal XT Insertable Cardiac Monitor is a programmable device which continuously monitors the patient's subcutaneous ECG and provides information regarding arrhythmia episodes, long term trending of AF burden, patient's activity and heart rate variability. The Reveal XT records cardiac information in response to patient activation and automatically detected arrhythmias thereby offering advantages over conventional tools for long-term arrhythmia monitoring with regard to compliance and recording time.