Commotio cordis is defined as a cardiac concussion with significant electrical disturbance when force is applied to the thorax during a vulnerable phase of ventricular repolarization. Commotio Cordis is the second highest cause of death in athletes.
As of June 1, 2013, there are 293 area codes in service in the 50 states, plus 1 for DC and 6 for various external territories of the United States (Puerto Rico, U.S. Virgin Iâ¦slands, Guam, American Samoa, and the Northern Mariana Islands), plus 10 more that are scheduled to be added in the coming months.
Iowa is currently using five area codes. Iowa does not utilize any area code overlays. Iowa originally had three area codes, 319,515, and 712, when the numbering system was established in 1947. It was not until thirty three years later in 2000 that Iowa experienced sufficient growth in population and telephone use to need an additional area code.