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.
NXX codes are the first three digits of a phone number that follow the area code. There are about 10,000 numbers in each NXX code. The federal body that administers telephone number initially assigns telephone companies whole NXX codes in blocks of 10,000 numbers. Existing numbers keep the old area code, and only new telephone lines are assigned the new area code. 2  Phone numbers for all types of services are included, whether the phone number is for a phone, cell phone, fax machine or ATM.