For example, a certain maize variety grown in a cool climate will need less water per day than the same maize variety grown in a hotter climate. It is therefore useful to take a certain standard crop or reference crop and determine how much water this crop needs per day in the various climatic regions.
An implantable cardioverter defibrillator (ICD) looks very similar to a pacemaker, except that it is slightly larger. It has a generator, one or more leads, and an electrode for each lead. These components work very much like a pacemaker.
CPT stands for Current Procedural Terminology, whereas ICD-9 stands for International Classification of Diseases, volume 9. The ICD-9 assigns a specific code to the diagnosis of the condition or disease being treated. This is a uniform method so that the third party, doctor and patients can understand what is being treated in the patient encounter. The ICD-9 comes in three volumes. Volumes one and two are the same, except volume one is organized alphabetically, while volume two is organized by systems.