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.
Best Answer: Prior to 1906, it was unregulated. In 1906 and after, some states passed regulation legislation. In 1913 California passed the first state marijuana prohibition law.The Marihuana Tax Act of 1937 made possession or transfer of cannabis illegal throughout the United States under federal law, excluding medical and industrial uses, in which an expensive excise tax was required.n 1906 and after, some states passed regulation legislation. In 1913 California passed the first state marijuana prohibition law.