To all sufferers, here's a revelation!
Get ECG done first to eliminate heart problem.
If its normal, then most probably the problem lies with the neck muscle.
I've been having this problem for a long time and I've been on many types of medication, but to no avail.
I was very worried about my heart condition.
It was during one of my many visits to the doctor about this problem that I had ECG done during the attack (the most accurate period of test).
And to my relief,it came out normal and the doctor suggested that it could be from the neck muscle.
It was then I realized that whenever I'm stressed or excited, I tend to stiffen my neck thus causing the shakes. Once you realized the cause and trigger, the next step is be conscious of your neck muscle and NOT to be overly concern. Over time, you will outgrow it!