An electrocardiogram (EKG or ECG) is a test that checks for problems with the electrical activity of your heart. An EKG shows the heart's electrical activity as line tracings on paper. The spikes and dips in the tracings are called waves. The heart is a muscular pump made up of four chambers .
In the official rules for Major League Baseball, it is stated that the outfield fence should be at least 250 feet from home plate. A distance of 325 feet or more along the foul lines and 400 feet or more to center field has since become mandatory for any new stadiums.
THE FIELD. The field measures 100 yards long and 53 yards wide. Little white markings on the field called yard markers help the players, officials, and the fans keep track of the ball. Probably the most important part of the field is the end zone. It's an additional 10 yards on each end of the field.