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.
However, Nixon discounted the recommendations of the commission, and marijuana remains a Schedule I substance. In 1996, California became the first state to approve the use of marijuana for medical purposes, ending its 59 year reign as an illicit substance with no medical value. Prior to 1937, cannabis had enjoyed a 5000 year history as a therapeutic agent across many cultures.