I have Tachycardia and AFIB. My Cardiologist successfully weaned me off Amiodarone and switched me to Metoprolol about a year ago. It's worked fine so far ... I now am comfortable hiking/jogging/walking about an hour at a time instead of 30 minutes max. before. My resting heartbeat with Metoprolol went from the 60's to the 50's, but no noticeable symptoms developed.. Taking 25 mgs a day. Any noticeable palpitations or arrhymths during the day are short-lived and stop on their own w/o any additional pills. Doc wants me to get Internal Loop Recorder next. Should I?