Not to be confused with other types of electrography or with echocardiography. Electrocardiography (ECG or EKG) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on the skin.
Addiction is defined as a chronic, relapsing brain disease that is characterized by compulsive drug seeking and use, despite harmful consequences. It is considered a brain disease because drugs change the brain; they change its structure and how it works.
Opiate and opioid withdrawal. Opiates or opioids are drugs used to treat pain. The term narcotic refers to either type of drug. If you stop or cut back on these drugs after heavy use of a few weeks or more, you will have a number of symptoms. This is called withdrawal.