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.
How deep can one swim underwater with just a snorkel or long tube knowing that the lungs can operate against a pressure differential of less than 0.05atm.? - julie. A: The pressure underwater goes up about 1 atm for every 10 m deeper that you go.