Implanted loop recording via remote monitoring (including reprogramming (if required), retrieval of stored data, analysis, interpretation and report), for the investigation of atrial fibrillation, if the service: (a) is provided to a patient who has been diagnosed as having had an embolic stroke of undetermined source; and (b) is not a service to which item 38288 applies Applicable not more than 4 times in any 12 month period