Hi there. I am sooo happy to have found you guys! I thought I was the only person in the world with these crazy symptoms. Well, not really but my drs sure have made me feel that way. I've had palps and sinus tach on and off since I was a teenager. I'm 37 now. The first episodes were fleeting and my first major episode occurred when I was in my early twenties at which time I saw a Cardio and he told me I had sinus tach and perscribed Atenolol which I never bothered with. The problem seemed to go away on its own for about 6 years or so but returned with a vengeance sometime after having my daughter who is now 10. During the past several years I've changed my pcp a couple of times and have seen 2 additional cardios because I've basically been dismissed as being "anxious"! One of them told me that the only problem with my being tachy is "that I'm aware of it". What is that supposed to mean?! My current cardio is a compassionate person that I respect but he doesn't seem to know much about this condition and has prescribed Zebeta (isoproprolol) which seemed to have a mild positive affect early on but really isn't helping at all now. I am scheduled to see him on 4/19 but have little hope that anything will come of my visit. Since finding this group and reading thru all of the info here I'm questioning exactly what my paricular "syndrome" is. I've spent time at an IST (Inappropriate Sinus Tachycardia) forum as well. Its all so confusing and overwhelming. I'm hoping that if I describe a little about my symptoms I can get some advice on where to turn. I'm thinking that I may be a POTS candidate but am not sure of the type of dr that would be able to diagnose this. I think I need to see an Electrophysiologist but doubt I'll find one here in RI. Here are my symptoms: Increased heartrate round the clock but somewhat lower during sleep (if I remember the results of my 24 hr. holter test), nearly constant palps, nite sweats, near fainting, chest pain/tightness, shortness of breath, dizziness, nausea, inability to stand without worsening symptoms including weakness/shakiness, lack of concentration, and extreme fatigue. I'm also very sensitive to heat but get cold very easily as well. THIS IS NUTS! Not sure about blood pressure. Testing done: ekg, echo, stress, thyroid levels (many times), 24 halter monitor, various bloodwork - all normal other than increased heartrate. I did have an ANA that was positive and have been diagnosed with Raynaud's Disease by a rheumo dr. Wow - its really harad to actually write all of this personal stuff down. I'm been doing such a good cover up job over the years. Its weird to face up and put it out there. I've begun telling my family members and thats been scary too. Anyway, over the past year my symptoms have worsened to the point where my quality of life is deeply affected especially in the last two months or so. I am currently not driving and hardly go out. My husband is extremely supportive and I'm relying on him way too much. I need to get back on my feet! Wow! Sorry for being so wordy. I tried to be as brief as possible and appreciate your time and concern. Thanks to all of you for caring. --- Debbie