<s>[INST] I saw my doctor yesterday, and she was checking my heart beat, and asked if I drank coffee.  I said yes, and she said she wanted me to stop, as she was hearing something irregular.  She then said I could have one cup of decalf coffee.  I did not think of asking her about drinking regular tea.  Can I still drink tea and cola etc?  Aslo, just to let you know she said my blood pressure was excellent. Thanks Sue [/INST] Hi Sue! Beverages that contain caffeine are known to have an impact in the heart rate, mainly causing sinus tachycardia. Coffee and all Chat Doctor.  Regarding your question, some types of tea contain low levels of caffeine (black tea, green tea, etc.). There are also some herbal tea that do not contain caffeine at all, such as Camille, ginger tea, peppermint tea etc. I would recommend the use of tea, especially herbal tea. In my opinion and experience, you can also use green or black tea, but since they have low amounts of caffeine you should not exaggerate with the frequency of use during the day. In terms of cola, I would advise that you don't use it, since it contains considerable amount of caffeine. I hope my advices would be helpful to you. Take care, and thanks for sharing your concern with us. </s>