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 the 1970s, many places in the United States started to abolish state laws and other local regulations that banned possession or sale of cannabis. The same thing happened with cannabis sold as medical cannabis in the 1990s.he Marijuana Tax Act of 1937 effectively made possession or transfer of cannabis illegal throughout the United States under federal law, excluding medical and industrial uses, through imposition of an excise tax on all sales of hemp.