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.
Your question is based on faulty information. First of all, there are far fewer than 517 area codes currently in use in the United States, even if you include the other countries that use US-style area codes (Canada and 16 island countries in or near the Caribbean, plus US territories in the Caribbean and Pacific).