Can mitral vavle regurgitation get worse depending on sleeping position?

[RalphHammerfell]

I've been diagnosed with mitral valve prolapse and regurgitation. The doctor doing the echo said it was only minor, and I don't need surgery, just meds for the arrythymia it's causing.

However, when arrythymia is not the only thing I'm experiencing. I feel quite the discomfort and dizziness when I lay heavily towards my left side/chest. My question is, it is possible that the regurgitation is much more severe than what appeared in the echo due to not resting heavily on my left/chest, but more on my backside position I was in while doing the test?

Or does it not  change according to position, and I'm only noticing the symptoms more due to laying on my left side?

[Ger57]

Mitral regurgitation caused by prolapse often increases (a little) on standing and decreases on supine position.
I can imagine that there may also be a difference between lying on one side or on the back.
Still, if your regurgitation is only minor, the difference caused by posture will most probably also be marginal and not be an explanation of your symptoms.