### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I am a 17-year-old female who has recently began experiencing some mild, but worrying cardiac symptoms. My heart is oversensitive to physical activity (not from being out of shape, as this started quite suddenly) and beats slightly faster than normal at rest. I get out of breath very easily and have palpitations when I lay down. Also, I sometimes get very dizzy. In other words, I just haven t been feeling right . After two months of these symptoms and a long-anticipated visit to the doctor, I had an ECG done and it came out completely normal, as did my blood tests. The doctor listened to my heart and said he heard nothing abnormal, except for a skipped beat when he had me perform the Valsalva maneuver which brought up the slight possibility of mitral valve prolapse. Although I was deemed completely healthy, I still want a second opinion and I want to know if it would be safe to go on roller coasters because I m going on a trip to Cedar Point soon. I know people with heart conditions should avoid rides.

### output:

Hi, yes its perfectly safe to go on a roller criteria ride at your age and the probabilities of different cardiac conditions you may have, so enjoy your vacation and don't be apprehensive, as anxiety itself will push your heart beats to higher side because of a Chat Doctor.  Now At your age the most common possibility to cause the symptoms, if at all its cardiac in origin, is mitral valve prolapse, which may cause extra beats, cause some breathlessness and anxiety attacks.  However, because cardiac examination was normal, no murmur or click heard so in all probability it must be very mild and hence no treatment is needed as it's completely a benign condition and 1 in every 4 human will have some form of prolapse.  Now to confirm this does get a 2d echo done at convenience and a 24 hour holder to know the frequency of missed beats if your symptoms persist.  Regards 