my biggest fear is having an HCM Hypertrophic Cardiomyopathy which is considered the leading cause of sudden cardiac death upon young individuals. They say the Echo is used to capture this condition but I just don't know what to think. I still don't have an exact explanation for my arrhythmia's although they do run in the family but not specifically during exercise like mine are. The biggest thing I fear is sudden cardiac death. I feel that if I were to suspect any problem, it wouldn't be a common abnormality within the heart, instead possibly something more rare such as HCM/
if your echo came back fine then you likely have no need to worry about HCM or even just an arrhythmia turning deadly. most of them are pretty harmless however what you are feeling cant be diagnosed until captured. it could be something as simple as dehydration so make sure you drink lots of water when you exercise. it could just be fear as well or a simple fixable arrhythmia but the fact that it reverts quickly is a good sign. try not to stress and see your doctor if your issues persist. take care and keep us posted on how you are doing
Between sets, your blood pressure and pulse naturally drop a bit. During this interval, there is a tendency for ectopic beats to 'sneak in,' and the sensations these cause can be frightening. Fright can cause more palpitations, making things feel even worse. As if that were not enough, fear affects the Vagus nerve, which, when it is stimulated, can lower blood pressure even more and cause what's called 'Vasovagal faintness.'
I have experienced this myself, and although not dangerous, it certainly is not pleasant!
Frankly, since you are young and your heart has recently been checked out very thoroughly, it sounds as though you are dealing with something benign that is worsened by anxiety. You are almost certainly not in any danger of sudden death--the kind of thing that sometimes happens to competitive athletes on the field, who often are found afterward to have had a hereditary condition that your tests would have revealed.
I would recommend that you report your experience to your doctor, just to be a good patient, and that you ask him/her for a recommendation of a therapist who can help you deal with anxiety about your heart.
In the meantime, there is a cheap and very helpful little book out there called 'Hope and Help for Your Nerves,' by Dr. Claire Weekes. Quite a few people here have benefitted from it.
Thank you so much for your response you have greatly helped me ease my mind. Thanks for sharing your similar experience as well, it feels great to know someone's gone through this too. Have a good one!