merttygirl,


Palpitations can sometimes have no definate cause, but they can be caused by anemia, anxiety, some thyroid problems, hypoglycemia, and mitral valve prolapse. A very common cause of palpitations is the overuse of stimulants, including caffeine (coffee, tea, sodas), nicotine, diet pills, and medications such as decongestants. Another less common cause of palpitations is a type of abnormal heartbeats called premature beats, PVCs (premature ventricular contractions), or ectopic beats. These are abnormal beats that are not a problem if they occur just once in a while. However, if they occur frequently or in sequence, they can lead to problems.
Your mitral valve is one of four valves that regulate blood flow in your heart. Normally the mitral valve closes after blood flows through it. The closure keeps blood from leaking back into the upper chamber. If you have mitral valve prolapse, the valve flaps bulge backwards into the upper chamber. Usually, the effect on your heart is minor because the seal between the two heart chambers remains tight enough to prevent leakage.Unless you have developed mitral valve regurgitation and you have symptoms, you will not need treatment. Your doctor will most likely want you to have a follow-up exam in 3 years. You can read more about mitral valve prolapse here
http://www.medicinenet.com/mitral_valve_prolapse/article.htm

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