What happens to a persons heart rate when they play video games?

Most Video Games will increase someone's heart rate. The main games that increase heart rate are racing (especially off-road or street racing) games, Horror games, fast paced shooters, etc. Racing games like Need for Speed Series, Burnout Series, Flatout Series, Midnight Club Series, Motorstorm Series, etc increase it the most. Though if you play horror games like Alien vs. Predator 2, F.E.A.R, Doom Series, etc you can increase your heart rate considerably because of the constant spooks from bad guys or monsters or whatever jumping out the darkness at you suddenly. Violent shooters actually increase heart rate the least. Only a few shooters increase the heart rate significantly. An example would be the Brothers in Arms series.