Commotio cordis. Commotio cordis (Latin, agitation of the heart) is an often lethal disruption of heart rhythm that occurs as a result of a blow to the area directly over the heart (the precordial region), at a critical time during the cycle of a heart beat causing cardiac arrest.
A ZIP Code is a five digit number that identifies a specific geographic mail delivery area. The acronym ZIP refers to Zone Improvement Plan, a plan implemented by the USPS in the early 1960âs to improve the sorting and delivery of mail. There are approximately 43,000 ZIP Codes in the United States.
All phone numbers in the North American Numbering Plan (NANP) are allocated first as area codes by region and then by prefix for smaller locations. Some states, like Wyoming, have a single area code (307) while metro areas, like Houston, can have multiple area codes (713, 281, 832, 346) all covering the same physical place.