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.
Marijuana History In United States Sees Milestone, Pot First Banned In California 100 Years Ago. Stricken with cerebral palsy after almost being strangled in the womb by his umbilical cord, the 41-year-old Valley Village resident takes a few puffs of medical marijuana and immediately feels relief. Weed works, he says simply.