### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, may I answer your health queries right now ?  Please type your query here...Last week while at work, my left breast started fluttering, like in the top.  Didnt think anything about it.  That night after lying down, my heart started racing. Took me a while to go to sleep. Next morning still pretty fast, but quieted down during the day and nothing erratic since.  I did have an ekg that morning since I was fixing to get on a cruise ship.  Other than my known right bundle branch block, nothing else.  Should I contact my cardiologist since nothing else has occurred.  Im a little anxious.

### output:

Hello, This can just be an anxiety or can be a cardiac arrhythmia like PSV or atrial fibrillation, in which heart rate suddenly goes up and also suddenly decreases. Blood pressure falls during these episodes and one has dizziness, fainting, blackouts, sometimes syncope. Usually ECG is normal as it is usually done in between the episodes. ECG done during episodes will show abnormality. You will need 24 hour holder monitoring if episodes are occurring on daily basis so that it can pick it. So visit nearby cardiologist for this investigation. Also, hemoglobin and thyroid test should be done. Ln order to abort such episodes you should try to cough hard.  Is there any stress or anxiety associated, if yes it can also cause it.  Till the time your evaluation is complete, you can ask your local doctor for tab collar LA 20 mg once a day which will take care of such episodes and also anxiety. If none of the above is successful then last option is of electrophysiologist studies which is invasive test which can diagnose and treat the arrhythmia permanently in most of the cases.