Post-ED Care of Study Patients: All patients enrolled in the study will be linked to a local cardiology group for any urgent and end of study follow-up. Patients will be advised to keep a diary of symptoms during the 15-day monitoring period. Patients in the cardiophone arm will have the option of transmitting the rhythm when symptomatic and symptom-rhythm correlation will be reported. Patients will be advised to return the devices and the symptom diary to the local cardiology clinic the next business day after the 15-day monitoring period. All monitoring reports will be completed by the central monitoring station within 24-hours and sent to the study cardiologist. In the intervention (cardiophone) arm: 1) If serious arrhythmias are detected, then the central monitoring station will contact the patient or the family member and advise them to call 911 for the patient to be transported to the ED; 2) If other arrhythmias are identified, the central monitoring station will provide an interim report to the study cardiologist providing care. The study cardiologist will decide the need for urgent follow-up and time-frame within which such follow-up should occur. For patients in the control arm with MCT device, the central monitoring station will provide reports for 48-hour holter monitoring and event monitoring for days 3 to 15 the next day after completion of the monitoring period (days 3 and 16 respectively). Patients in the control arm will be clearly advised that the monitoring is not live and they should seek care for symptoms as usual. All patients will be monitored for the entire 15-days regardless of early arrhythmias detected and will have end of study follow-up with cardiology to discuss the monitoring results and plan further management as deemed appropriate.