Palpitations and Chest Pain

[becca]

I am 25 and have been diagnosed with neurally mediated syncope.  It is believed that the syncope is caused by rapid tachycardia (170-180bpm); however, my normal resting pulse is in the upper 40s and will periodically drop into the high 30s (measured before I began taking a beta blocker).  I will more than likely have a pacemaker implanted in a few weeks so I can take a high dosage of beta blockers to combat the syncope.   Anyways, 8 days ago, I had a pretty bad tachycardic episode in which I did not faint, but my heart all of a sudden started beating +150bpm and lasted for about 20 min.  About 5 minutes after the tachycardia ended, I have began experiencing palpitations that have intensified over since the attack.
   Two days after that tachycardic episode, chest pain developed along with the palpitations. This feeling of pressure in the center of my chest is always accompanied by the palpitations and will sometimes last only 3-4min and other times for several hours (especially in the evenings).  I do not have SOB with the pain, but I do have some difficulty catching my breath after doing anything like walking up a flight of stair.  The center of upper left back burns which is especially noticeable when I wake up in the morning.  My neck has been bothering me, and there has been a lingering tingling sensation in my upper left arm.  And in general, I have been pretty much consumed by fatigue since that tachycardic episode.  The fatigue, of course, is not being helped by the fact that at night I am not sleeping well and will sometimes wake up with these intense palpitations and a slightly tachycardic heart beat. It has finally stopped getting worse, but it does not seem to be improving.
I finally called my cardiologist after 3 days of this, and all he told me to do was to increase the dosage on the beta blocker I was taking.  However, even with 3 times the dosage of the beta blocker, my symptoms are only temporarily allievated. I went to the ER after the 5th day, and they completely disregarded my complaint because I am only 25 years old and simply sent me home.  
My FH does include Coronary Heart Disease and high BP but only in relatives 60+ years in age. My cholesterol and BP are low and before I began having syncopal attacks, I would exercise daily.  Considering my age and life style, I seriously doubt that AMI or related ischemic disorders could be the problem.  However, I do not know how to interpret these symptoms.   This is very uncomfortable, and I am getting very discouraged because no one seems to take me seriously.  Could this be pulmonary or musculoskeletal related? (I do not any have congestion, and I can't remember doing anything to cause injury to a rib or any surrounding tissues.) Could some damage have been done to my heart during that initial tachycardic episode 8 days ago that could have caused all of this to happen? Could this be MVP?    Any comments would be greatly appreciated.

[Terry]

I too had a perfect stress test, thallium scan and echocardiogram.  I had low blood pressure and perfect cholesterol numbers.  I started having severe palpatations with very bad pain.  I was told it was acid reflux.  My EKG's were perfect.  The pains got worse at night and then started coming all the time.  Finally, my cardiologist did a angioplasty and found I had a 95% blockage of my LAD.  My first two stents re-stenosed but, knock wood, it has been over a year and the third one seems to be holding.

I was 48 at the time, had not been through menopause, am thin and exercise every day...

The Doctors can still not believe what they found.  My point is everyone is different.  Keep pestering the Docs till they find out what is wrong.