<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing increased heart rate, irregular heartbeat, and palpitations. What could be the possible reason for these symptoms?  <response>: Based on your symptoms, it seems that you might be suffering from angina, a condition that occurs when your heart muscle doesnt get enough blood flow, leading to chest pain, shortness of breath, and other symptoms. 