I am a 32 year old male and for the past 5 years or so, I have been experiencing what i would explain as what feels like a minor heart attack about once a week. 

While i`m sleeping it starts as what i can describe as waves or rushes of blood from my head to my chest followed by severe rapid heart beats to the point that it feels like my heart is going to beat out of my chest. I am unable to wake during these attacks followed by shortness of breath.  I am completely aware that this is happening but an unable to move or speak and have to fight to come out of it.

I have seen many doctors and have had a full range of blood work, ECG`s and had a holter monitor and nothing has come back as a concern.

Has anyone experienced this or have any ideas or suggestions for what it may be or what I can do about it.

Thanks.