I've been having palpations. my heart is pounding but not racing. I measure my bpm when it's happening and it jumps around between 56-76 within 10-20seconds of each other. lasts for hours at a time. currently waiting for a 24hr heart monitor. I also experience periods of lightheadedness (not dizziness). I have not been prescribed anything yet. I have propanolol (10mg) for anxiety as needed (not linked to current symptoms). Is it safe for me to take propanolol to calm the palpataions?