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.
Between 1973 and 1978, eleven states decriminalized marijuana, but after 1978 decriminalization in the U.S. ground to a halt. Not until 2001 did another state, Nevada, reduce marijuana possession to a misdemeanor. Since 2012, several other states have decriminalized and even legalized marijuana, ushering in a new chapter in the history of the decriminalization.