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.
There are 36 area codes for Canada, and 20 for various other island countries and territories in or near the Caribbean. In addition, there are 14 special non-geographic area codes, including the 8YY codes for toll-free numbers and other codes. That's a total of 370 area codes currently in service in North America.