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

### input:
I m 22, ive been experiencing rapid heartbeat since my childhood days. every time it stuck it makes me feel uncomfortable and makes me feel week. When it happen it will go away after sometimes. I have a history with low blood pressure which can makes me faint and i have thalasemia threat.

### output:

Brief Answer:The most probable cause of your symptoms, is anemia. You should see a hematologist. Detailed Answer:Hello, Thank you for using Chat Doctor. Heart palpitations usually aren't serious or harmful, though, and often go away on their own as in your case. The palpitations may be due to different causes such as stress, anxiety, hyperthyroidism, anemia, low blood pressure, deny Chat Doctor. In rare cases, palpitations can be a sign of a more serious heart condition. In your case, being carrier of a thalassemia trait, the most probable cause of these symptoms, can be anemia. You should have a full blood count exam, ferritinemia, sidearm, and hemoglobin electrophoresis. After that you should see a hematologist to discuss the treatment and follow up. Once anemia is corrected, your symptoms will go away. If you still have palpitations (rapid heart beats) after anemia treatment then you should be checked for other causes of anemia too. You should test the thyroid hormones level (TSH, fT3, fT4), the electrolytes (Na, k, Cl, Ca) levels in blood, and you should make an ECG and see a cardiologist too.Meanwhile, you should take plenty of water (2 - 3 liters per day). Try to avoid getting stressed or anxious. Hope this is helpful. Let me know if you need more clarifications. Otherwise, please close and rate the answer. Kind 