<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, I had one episode where i felt my heart had trouble beating and felt like I was going to pass out, as soon as I stood up it went away and my heart was beating fine. I went right to the doctor and he said my heart sounded fine and that it was a panic attack. I was not convinced so I went back to another doctor and he said it sounded great!!! Do doctors really know if something is wrong by just listening to the heart? Since then, which was 2 weeks ago I have had no problems. Thank you Crystal  <response>: Hi, I understand your concern and would explain that the episode that you describe seems to be a panic attack. By listening to the heart, doctors can learn a lot about your heart. Anyway, sometimes, some tests are necessary: - a resting ECG and cardiac ultrasound-thyroid hormone levels-fasting glucose-blood electrolytes. If these episodes occurs again, I would recommend performing these tests in order to be sure that everything is really OK. Hope I have answered your query. Let me know if I can assist you further. 