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.
Total: (8 * 9 * 10) â 28 = 692 possible Area Codes. Exchange codes: (the first 3 digits of your 7-digit number. Same rules as above, except: the 20 reserved codes are allowed, and the second digit 9 is allowed. 1st digit is 2-9; 0 and 1 are special prefixes and are NOT allowed (8 possibilities)