Each of the 12 ECG leads records the electrical activity of the heart from a different angle, and therefore align with different anatomical areas of the heart. Two leads that look at neighboring anatomical areas are said to be contiguous.
PCP can be snorted, smoked, injected, or swallowed. It is sometimes smoked after being sprinkled on marijuana, tobacco, or parsley. Ketamineâalso known as K, Special K, or cat Valiumâis a dissociative currently used as an anesthetic for humans as well as animals. Much of the ketamine sold on the street has been diverted from veterinary offices.
Ketamineâs origin story. Ketamine was first synthesized in 1962 by Calvin Stevens at Parke Davis Laboratories, according to Encyclopedia Britannica. It received FDA approval for use in humans in 1970, and shortly after, Army doctors used the drug on American soldiers fighting in Vietnam as an analgesic and sedative.