A Diastolic reading of 43 is low and considered to be Hypotension.
If this is making your daughter unwell dizzy etc; she needs to see a Doc.
Her heart rate is slightly high if she is resting, which makes me think that it's working much harder than it should be to pump blood around the body - which in my opinion is not good.
However, I am not
a Doctor and this is only my opinion.
I wish your daughter well.