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

### input:
i am having symptoms such as shortness of breath when i raise my hands over my head; heart palpitations; and if i dont slow down or stop whatever i am doing that is causing the problem (ex: climbing the stairs quickly) then it only gets worse.  Then i am have to lay down (sometimes for hours) to feel better. My doctor says its anxiety but i can feel a definite problem in my chest. What is going on?

### output:

Brief Answer:There are different causes of heart palpitations and shortness of breath. You should do further examinations. 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. Most of the time, they're related to stress and anxiety or to consumption of stimulants such as caffeine etc. Even though, heart palpitations may occur in specific medical conditions such as hyperthyroidism, or anemia, low blood pressure, deny Chat Doctor. In rare cases, palpitations can be a sign of a more serious heart condition. A laboratory assessment of the thyroid hormones levels (TSH, fT3, fT4) should be done to exclude a hyperthyroidism. If it will be proven by the results of the above-mentioned levels of the thyroid hormones, you should see an endocrinologist for further treatment strategy and follow-up. Electrolyte levels assessment (Na, K, Cl, Ca) is essential, too and their correction (if deviations are noted) is necessary. Anemia can be ruled out by making a full blood count exam. If anemia is proven, you should treat it and your palpitations will go away. To be very careful, having experienced chest discomfort, and shortness of breath, you should make an ECG and see a cardiologist. If all the above-mentioned exams are normal, then stress and anxiety remain the most probable causing factor of your symptoms.Meanwhile, you should take plenty of water (2 - 3 liters per day). You should take an equilibrated diet. 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 