What causes a discomfort feeling in  heart suddenly?
Patient: As I was sitting at work I got a fluttering/vibration feeling in the back of my head and felt like I was going to pass out.  I also felt like I saw stars.  I am alittle shaky, however, I have eaten lunch today and don't have any other medical conditions other then a mixed connective tissue disease.  Is this something to be concerned about? Doctor: Hello and Welcome to ‘Ask A Doctor’ service.I have reviewed your query and here is my advice.A vibration feeling in the back of the head is usually a result of high blood pressure, but seeing stars is due to low blood flow to your retina and brain which makes you feel as if you are going to pass out.It happens to anyone on a long tired day, but with a history of mixed connective tissue disease, you may need to do 2 investigations which are Carotid Ultrasound Imaging to check out the main source of blood supply to your brain and retina, and Echo cardiogram to check out your cardiac output.In case of any positive results, don't panic .. there are many ways to treat them.Hope I have answered your query. Let me know if I can assist you further.Regards,Dr. Mario Aiad