I had the same problem, everytime I would lay down to sleep I could hear my heartbeat so loud I couldn't sleep. I heard it in both ears but more so in one than the other.
2 things I did. First I changed my pillow from the down pillow I was using to a regular pillow. Second I started taking a low dose of hbp medicine.
I take 5mg of lisinpril.
Now I can sleep at night without hearing any heartbeats.
I don't know if this is relevent to your case but I thought it worth mentioning. I'll never use down pillows again. Lol

take care!
Debby

I have the same problem in my right ear. Woosh woosh woosh aaaggghhh!!! My doctor says my eustachian tube is stuck in the closed position?? He said take decongestants. But so far its not helping any!!

Hi there
I was sitting at my computer playing a game when I heard my heart pounding in my left ear and I could also feel it at the same time, I cannot describe the feeling but it was loud, the funny part is it dosent bother me it actually fasinates me, this is the third time I have experienced this and the only medication I am on is lovan for depression which I have been on for ten years, it has started in the last year I am 51