Hi, welcome to our site. I am Dr Saumya Mittal, MD. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query I must tell you that there is no relation between the two conditions that you have just mentioned. the flu will not cause irregular heart rhythm and vice versa. However irregular heart rhythm is something that needs to be evaluated. It might be nothing more than anxiety, however more serious cardiac lesions need to be ruled out. I would suggest an ecg, and a holter monitoring if needed. I hope this helps you. Inform the reports mentioned above/if any other so I can be of help further. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Please feel free to ask another query. I would be glad to help you. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this) Best of luck.