I have done some reading on found this website on Heart Loop Recorders that may help you answer some questions about it. The short answer is that typically, they can stay in for about a year, maybe 14 months.
Dr. Diana Walcutt
The Stress Masters
*Dr. Walcutt is a Psychologist. Dr. Walcutt's answers are not intended to diagnose or treat any medical or mental disorder. Any information given in a post about medication is for educational purposes only, and primarily to aid you in having an informed discussion with your own Psychiatrist/Physician.