Thank you David, i had put up some questions i hope you can answer them so that we can proceed on your issue.
Missed beats are mostly due to abnormal heart beats what we call PVC's or PACs.
Holter test helps to make sure there is nothing serious like other arrythmias that is causing these symptoms.
If you have symptoms like dizziness, blackouts along with these missed beats then you need to consult your doctor ASAP.
In most cases medicine like beat blockers can help control these symptoms.
I hope this helps.