Confirm Rx Insertable Cardiac Monitor SMART Registry

Inclusion Criteria: * Have an approved indication for continuous arrhythmia monitoring with an ICM * Have a cellular phone or the ability or willing to use a St. Jude Medical mobile transmitter that is compatible with the MyMerlin App and able to communicate with the Confirm Rx ICM device. * Have the ability to provide informed consent for study participation and be willing and able to comply with the prescribed follow-up tests and schedule of evaluations. * Are 18 years of age or older, or of legal age to give informed consent specific to state and national law. Exclusion Criteria: * Subject is implanted with or indicated for implant with a pacemaker, implantable cardioverter defibrillator (ICD), or cardiac resynchronization therapy (CRT) device. * Enrolled or intend to participate in a clinical drug and/or device study, which could confound the results of this trial as determined by the sponsor, during the course of this clinical study. * Have a life expectancy of less than 1 year due to any condition. * Have a previous ICM placement.