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

### input:
Hello, for the past 4 years i feel like im not myself.  Very often (1 or 2 times a week) my heart is pounding (i can see it thru my clothes), fast heartbeat, headaches, dizziness, shortness of breath, loss of apetite, weakness, fatigue, feeling like passing out.These symptoms can sometimes stay with me for a week.I have visited so many doctors but they cant find anything, please give me some ideas on what that could be.Bozena

### output:

Hello and thank you for using Chat Doctor. I carefully read your question and I understand your concern. You should not worry, I will try to explain you something and give you my opinion. You should know that your symptoms has to do with a rhythm issue. There are different reasons why you feel fast heart beats, difficulties in breathing deeply, dizziness. It might be just a sinus tachycardia meaning that your heart beats regard over 100 beats for minute. It might be what we call extra beats. These is electrical impulses that generates in part of the heart different from normal sinus rhythm. You feel palpitation, flattering sensation, difficulty in breathing deeply, anxiety. Or it might be a different arrhythmia like supra ventricular tachycardia, atrial fibrillation etc. The causes of this rhythm issue might be different to simple emotional stress, coffee or alcohol consumption or pathologies like anemia, hyperthyroidism or electrolyte imbalance. But these are sporadic episodes, and it might be difficult to catch them. If you was your treating doctor I will recommend some examination like an electrocardiogram, a cardiac echo to evaluate heart function, a full blood analyze to exclude anemia, hyperthyroidism or electrolyte imbalance and the most important one a holder rhythm monitoring to see your rhythm tendency. Only after this we can better understand what we are dealing with and how to ménage it. Hope I was helpful. Best regards, Chat Doctor. 