<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am experiencing an accelerated heart beat a odd times. I was just sitting down watching television and it started. My heart feels as if it is about to jump out of my chest. This is not the first time. It has been happening since I got sick over the christmas break.  <response>: Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, we should first rule out arrhythmia rhythm disturbances in heart in your case. Arrhythmias like atrial fibrillation AF, atrial flutter, supra ventricular tachycardia SVT etc. can cause rapid heart rate with pounding sensations. So better to get done ECG, 2d echo and Holder monitoring 24 hour continuous monitoring of ECG to rule out these causes. You may need anti arrhythmia Chat Doctor. Avoid stress and tension, if you are having stressful life. Dont worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. 