It represents the time from the end of ventricular depolarization to the start of ventricular repolarization. ST elevation may indicate myocardial infarction or pericarditis. ST depression may indicate ischaemia.
Marijuana has been illegal for less than 1% of the time that itâs been in use. Its known uses go back further than 7,000 B.C. and it was legal as recently as when Ronald Reagan was a boy.The marijuana (hemp) plant, of course, has an incredible number of uses.arijuana has been illegal for less than 1% of the time that itâs been in use. Its known uses go back further than 7,000 B.C. and it was legal as recently as when Ronald Reagan was a boy.
In mid-April, Pennsylvania passed legislation to legalize medical marijuana, bringing the total number of states (plus Washington, D.C.) with some form of legal pot to 24. The majority of those states have legalized cannabis for medicinal purposes, however recreational marijuana use is fully leg al in Alaska, Colorado, Oregon, Washington and the District of Columbia.