Hormonal?

I saw a similar question a couple days ago, but the actual question of whether it can be hormonally triggered in women was never answered.  I am 29 and suffer sinus tachycardias.  I went on Toprol XL 50 mg in March and had no attacks until last week, a week after my period ended.  I have had 2 more attacks this week on Monday and the cardiologist increased my toprol xl to 100mg daily.  After suffering diarrhea, nausea, vomiting, dizzyness, and feeling worn out, he switched me on Weds. to Cardizum 180mg.  My blood pressure dropped to 90/42 two hours later and I had another attack. They decided I was dehydrated and gave me an iv of liquids and then sent me home.  I have done a treadmill stress test which showed nothing, thyroid checks show nothing, my blood sugar is fine, a blood test to see if I had a heart attack was negative.  I am going to do an event monitor again starting next week for another month.  I did one in April and had an attack on it which showed a sinus tachycardia, but no other problem.  My mom had similar episodes from the time she was 35 that were deemed by her doctor to be "in her head, the more you think about them the more they occur, the more they occur, the more you think about them."  Her attacks ended 6 monthes after hitting menopause.  My attacks have all occurred during or right after my periods.  I have been told that a period puts extra stress on your body which could cause them.  But it seems more than just the stress to me.  I have talked to other women with SVT who get the attacks around their periods.  Is there a correlation?  If no one has figured it out, wouldn't it make sense for a specialist to do a study.  While they are not life threatening, I am home alone days, with no car and two small children.  These attacks are to intense to have to take care of two kids while experiencing the attack.

[CCF CARDIO MD JMF]

Dear Tracy,

You will find that many women who write  to this site experience the same thing.  I believe that hormones play a great role in these triggering of events however, little research ahas been done in this area.

You may try low dose beta blockers at particularly bad times of the month to get around these attacks.  You should discuss this with your MD.