I just experienced some serious anxiety at a meeting I was attending that was very stressful and my heart actually JUMPED in my chest...no pain but it jumped.  It felt like it was in the left side of my chest, not in the middle.  I am 48 years old and recently had a stress echocardiogram done because I was told years ago that I had a mitro valve prolapse.  The results showed nothing with my valves except what they described as a very very minor prolapses, no leakage.  What could this jumping in my chest be cause by.
Hello, This is called as palpitations and most likely occurred in you due to anxiety and panic.  If this is occurring repeatedly, one ECG during the episode will be helpful or else holder monitoring to rule heart arrhythmia should be done. Also, get one thyroid test done.  You can get tab Collar LA 20 mg once a day prescribed from local doctor which will decrease these palpitations. Try relaxation techniques like yoga and meditation for your stress.