I was rushed to the hospital due to heart palpataions and after my Echo, I was told that I have Thickening of the MItral Valve leaflets with mild regurgitation. My heart rate is at rest is always around 100 -120. I have been feeling dizzy (sometimes but not with exercise...just laying down or siting at my job) and very tired all the time. I have a pain in the left side of my neck where the cartiroid is and it's not sharp or anything but it feels strained. Should I get a second opinion and/or be on medication. I'm to scared to workout and I love to run but the last time I did and I checked my heart rate...the treadmill wouldn't give a pulse...it said to stop running.