Why is my heart beating hard and fast?

Since you already stated you have a panic disorder, it will cause the release of chemicals one of which is epinephrine which will cause your heart rate to go up. The light headedness is worrisome and just do not get up rapidly. Try just sitting up before standing. don't want to pass out. Your heart rate increasing with standing is perfectly normal, everyones does. Having a normal blood pressure is a good thing and maybe why your heart rate was up to keep your blood pressure up. Are you dehydrated? can cause low BP and cause high HR. Drink some water and see if this helps, or some chicken broth. Good luck and don't worry.

when you stand up, your heart beat should go up because blood needs to get there from your legs. drink some gatorade to increase the volume of your blood. you need to start jogging.

Your body might be reacting to something in your environment that got past your five senses. Here are a few possible things that may affect a person. 1. The silver filling in your teeth are more mercury and could make you sick slowly over time. 2. Stray EMF in your home can make you sick. 3. Lead in your drinking water pipes hazard. 4. Mold hazard 5. Radon hazard 6. Lastly, please consider the results of "NASA's Clean Air Plant Study" that can improve your environment drastically. "Common indoor plants may provide a valuable weapon in the fight against rising levels of indoor air pollution. Those plants in your office or home are not only decorative, but NASA scientists are finding them to be surprisingly useful in absorbing potentially harmful gases and cleaning the air inside modern buildings." "NASA research has consistently shown that living, green and flowering plants can remove several toxic chemicals from the air in building interiors. You can use plants in your home or office to improve the quality of the air to make it a more pleasant place to live and work - where people feel better, perform better, any enjoy life more." TOP 10 plants most effective in removing: formaldehyde, benzene, and carbon monoxide from the air. Common Name - Scientific Name Bamboo Palm - Chamaedorea Seifritzii Chinese Evergreen - Aglaonema Modestum English Ivy - Hedera Helix Gerbera Daisy - Gerbera Jamesonii Janet Craig - Dracaena "Janet Craig" Marginata - Dracaena Marginata Mass cane/Corn Plant - Dracaena Massangeana Mother-in-Law's Tongue - Sansevieria Laurentii Pot Mum - Chrysantheium morifolium Peace Lily - Spathiphyllum "Mauna Loa" Warneckii - Dracaena "Warneckii" Don't stop looking for the cause because your health is your wealth. Good luck.

Stop thinking about events that can have your heart racing Calm yourself down and take steady breaths