"The Rule of 7": A Case of an Ambitious Master Duatlonist Who Experienced a Sudden Cardiac Arrest.

One of the solutions to decrease the frequency of sudden cardiac arrest (SCA) in athletes is cardiovascular screening in the form of pre-participation tests (PPT). It is especially frustrating when SCA affects an athlete who has recently undergone PPT without any alarming findings. In our case, a 44-year-old ambitious amateur duathlete who underwent PPT within a year experienced SCA at home after an intensive weekend of training. It was related to a coincidence of new disease and other risk factors. PPT cannot be viewed as an unconditional green light for training and competition.