How To Treat Vagal Syncope,fluctuating Heart Rate And History Of Nerve Damage?

My 25 year old daughter has recently had a heart monitor placed in her chest to monitor her heart. She has nerve damage do to a accident damaging her disc C7-C9, severe winging of the scapula (left side) and damge to neck disc area. Her heart rate can range from mid 30 and jump to over 200 within seconds. she suffers from vagal syncope and has passed out a few times. Can anything be done so she can live a normal life?