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.
Cumulative Effect of Drugs. 1. Due to too frequent doses. 2. Due to too long continued administration. By cumulative effect is meant the unexpected, intense action of a drug after it has been given for some time, as differing from an immediate intense action of a drug which would show an idiosyncrasy.1.. Cumulative Action From Too Long Continued Administration of a Drug means the development of symptom a which show an over-action of the drug. This is of frequent occurrence and is sometimes accidental, but is often caused deliberately by pushing a drug to its full physiologic effect.