concern

[artibabe]

the heart rate is eratic and between 43 to 56 should I seak medical advice?

[condoline]

If the low heart rate (bradycardia) doesn't cause you any symptoms (besides fear of what's happening!), then it may be of no concern whatsoever. Hopefully you have been or will be checked out by a cardiologist. My question would be: are you on a statin? I stopped Simvastatin "cold turkey" (bad mistake!) and wound up with statin rebound three weeks later: leg pains and severe cramps for three nights (they left & never came back), resurgence of the peripheral neuropathy which I first got years ago from a year on Pravachol (statin) all the way up to my knees, worsening of my lung disease (which I discovered started with the Pravachol, stopped when I was off statins, and grew again when I went back on) AND wildly erratic heartbeats and tachycardia (all the way up to 140 beats per minute).
    The tachycardia was frequent for about three weeks, then it proceeded to space itself out, and finally it disappeared altogether. The wildly erratic heartbeats have become less and less frequent (and shorter in duration) also. I've been on Q10 since stopping the statin in mid-May of this year and I'm convinced this has helped, or at least I know it has increased my ejection fraction by 15 points. Mayo Clinic diagnosed me as being statin intolerant, and I wish I had known this fifteen years ago.

[CCFCardio MD1]

Based on the information provided, it would be difficult to tell if a heart rate of a 43 bpm would be acceptable or represent an underlying disease.  I would always recommend seeking medical advice whenever there is any doubt.