What causes fast heartbeat and dizziness?
Patient: over the last 3 months, every 3to 4 days my heart will beat very quickly and sometimes I feel as if I am dizzy. This lasts for maybe 10 seconds It has happened at night when I am sleeping and sometimes during the day. there is no pain involved, but I get flushed and walking around helps it to stop Doctor: Hello and welcome to ‘Ask A Doctor’ service.  I have reviewed your query and here is my advice. The possibility of cardiac arrhythmia is there, most probably psvt or some other arrhythmia. You need evaluation for that, one ECG and holter monitoring will be needed. Depending upon the report, further treatment can be suggested. Also get your hemoglobin tested. Try to avoid activities like driving and other high risk activity till evaluation is complete.Hope I have answered your query. Let me know if I can assist you further.Regards, Dr. Sagar Makode