Hi I was taken into hospital following blackouts and fast heart rates over 150 while resting. They have diagnosed me as having pre-excitation syndrome and put me on 50mg of antenol which seems to be helping, but i still get chest pain, shortness of breath and dizziness and extremely tired alot im not working as I have been sick following an op on my stomach so its not due to over working. Please can you tell me whether these symptoms are from the pre-excitation or from the tablets in taking and what can I do to help eliviate my symptoms and return to work, i work with mental health patients and Im not very good if I have to sit down all the time. thank you