Hey! So my three month old has just had an ecg and been diagnosed with a mild form of mitral valve stenosis. He isn't out of breath or anything like that and the Dr said it wasn't abnormally narrow, just slightly, anyone else got this, know of anyone with this, or in the same boat as me? Just want some reassurance I guess, he's very well in himself but I just worry incase it's a condition whereby he could suddenly just deteriorate over night x