Heart concerns

Last Thursday, Southern Indiana basketball player Jeron Lewis collapsed during a game and later died. On Sunday morning, Chicago Bears defensive end Gaines Adams was admitted to a hospital and pronounced dead shortly thereafter. Both of these players died of heart complications. While these two men died just recently, there have been several cases of collegiate and professional atheletes dying from heart conditions. The heart has to work harder for someone with a larger-than-average body, such as basketball and football players, putting tremendous strain on it. These recent deaths lead me to wonder how these tragedies keep happening. How did Adams's fatally-oversized heart go unnoticed? If all athletes go through rigorous physical examinations, how do glaring health problems like heart issues go undetected? Wouldn't the heart be one of the most throughly-examined parts of the body? Before any high-level athlete steps on the field, they should have to perform mandatory heart screens to try to prevent these sort of sad stories from happening again.