Standing up and heart races??

I have been getting a rapid heart rate and very hard beating you can see it sometimes through my shirt when I stand up. I get shaky with it also. I am losing it sometimes dealing with the rapid and very hard beats. I hate hearing it in my ears and feeling so strong. It sometimes will beat so hard and my pulse don't have to be up either. I stood up last night and it went from 79 to 150 in a second. I have calmed down a little but just tired of the feeling of it. I cannot wait to go back to dr. The potassium pils that the dr gave me for 3 days didn't change anything. Not sure what else to do. Xanax is helping some but not all the time and cannot take that much I sleep so bad with it. Dr waiting on results of echo and ECG yet from old dr. Anything else I can do? Eat, or exericse or something to stop the extremely hard beating? Thanks Carla

[lovingmom2]

Are you hydrated enough?  What happens to your blood pressure when you stand?
I would drink gatorade to make sure you are hydrated.  

[ladycolpepper]

Yes just had blood work to see if everythign in line .....all but potassium was slightly low and one other one high a little.MCHC......I have drank juices and thinks and drink at least 64 oz water daily every day. carla

[underinformed35]

Did they check your thyroid when they did the blood work?

[ladycolpepper]

Yep, thyroid checked out great. I am just getting frustrated with all of this, so new to me and overwhelmed I guess. Not meaning to complain and I know it could be something worse but have really had some scary times with this in the past year. I want some help somewhere from a dr. I know my new dr is gonna help me finally. Just impatient and want something to slow these attacks down. Thanks again.

[foxrider1781]

If you figure out the problem I would love to know what the diagnosis is, I've been experiencing the same thing as well

[jkfrench]

That used to happen to me.  I didn't even have to stand up.  Even if I would raise my arms above my head, my heart would speed up.  My doctor started me on atenolol and it fixed the problem completely.  I think he called it Inappropriate Sinus Tachycardia and told me it wasn't life threatening.  I only take 1/2 of the 25mg of atenolol.  Some days, it breaks through that and I just take another 1/4.  Anyway, it sounds exactly like what I had.  Google it and see if it fits your symptoms.