A quick search on the internet shows that you are not unique. It seems that about 1-2 % of people may have two valve flaps instead of three.
I suspect they've refered you to a cardiologist just to check on you and perhaps to monitor you regularly to catch any valve problems that might develop in future.
You do 'know' me- as regards the question 'are you unique'? A silly one really ....Yes of cause you are- everyone is! Were would we be if we were all the same? I am aware that this hasn't quite answered your question, in the way you meant to put it but still.......In answer to the question, you were asking for an answer on....No sorry your not unique there either, sorry once again.
If you want to 'discuss' this with me further, and more privately, please do 'email' me.
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