My son is 11 yrs old. He used to be in the swimming team but once when he was in training, he felt chest pains and out of breath as well as a bit dizzy. The trainers let him lie down and he felt better and he was taken to the hospital for ECG and echodiagram. The results were normal. We also had him take the treadmill test. All tests are normal. After a few weeks, he went back to training and the same thing happened, we thought it must be because his traning is in the morning and maybe his blood sugar level is low. Nevertheless, we stopped his swimming trainings. Several weeks ago, we went on a vacation and after swimming in the beach for a while, he suddenly felt that his heart rate s very fast so i just asked him to lie down and rest. It went away but that night during dinner, he complained of fast heart beat again and had to lie down in the restaurant. I could feel his heartbeat when i put my hand on his chest. We were thinking, maybe he just lacked sleep cause he had been sleeping very late at nite and waking up real early the past few days. Just tonight, after dinner, he complained again of fast heart rate. Since we have a BP and pulse monitor at home, i checked him and got a heart rate of 124 on his left wrist and 195 pulse rate on his right. BP is 96/58 on his left and 105/62 on his right. He used to tell me too that sometimes he would feel that his heart rate would suddenly gets fast. Should we get some more test? Is this normal for a kid his age? Should he stop all forms of exercise and start eating a strict diet? He s 135cm tall and is around 35 kg in weight.