### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hello. My 17 year old daughter who is extremly athletic was recently suffered from a VT 10 beat heart arrhymia. She was hospitalized for 5 days in which all tests came back totally normal. They did a stress test, Cardio MRI, Echogradiogram, and blood work. The only level that she has had low for a while now is her Ferritin which at one time was at 7 and now is at 31. She has been taking Vestera birth control for several years now, too. Other than that she has been perfectly healthy and active since she was a little girl. Now they want to do genetic testing to rule out CPVT which is scaring me to death. She is now on a low dosage of beta blocker and her soccer scholarship is on hold. Does anything come to mind? Anything? Please help us!! Jessica

### output:

Thank you for consulting in Chat Doctor. Low levels of ferritin are indicative of iron deficiency, which causes anemia(a reduction of RBC). Ferritine is protein for storage of iron. We also check with ferritin an iron level and a total iron binding capacity test. Normal ferritin for female 12-300 NG/ml. Your daughter had iron deficiency anemia which can produce also fast heartbeat. It is clearly seen that her ferritin is on the lower border of Norma, tendency to anemia.That's why I recommend you to Chat Doctor.  I strongly recommend you to visit cardiologist, because only he can prescribe correct treatment, others should not take responsibility to prescribe medicines for arrhythmia, because it is life-threatening state and one more she should not go in for sports Best regards