The investigation of cardiac arrhythmias is usually initiated with the Holter monitor which uses a continuous recording over a 24 or 48-hour period. The Holter allows detection of baseline rhythm, arrhythmia and conduction abnormalities. Holters however are bulky and inconvenient for the patient to wear, the transmission of data is not patient dependent and non-compliance with both device use and maintaining a written symptom log, limits its diagnostic utility. The lack of extended monitoring reduces diagnostic yield to typically less than 20%. Bass reported a diagnostic yield of 15% with 24-hour Holter monitoring that did not increase even if the device was applied for 72 hours.