A CK-MB test may be used as a follow-up test to an elevated CK in order to determine whether the increase is due to heart damage or skeletal muscle damage.
Scuba organizations say recreational divers shouldn't go below about 130 feet, but one Egyptian diver recently ventured a bit deeper -- going more than 1,000 feet below the ocean surface and setting a world record in the process.
According to Guinness World Records, that descent -- about as deep as New York City's Chrysler Building is tall -- is the deepest scuba dive ever. Egypt's Ahmed Gabr breaks long-standing record for deepest #scuba dive at more than 1,000 feet http://t.co/lA34t2EiVb pic.twitter.com/AcvlUAGWNJ.