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.
There are only slight differences between these arrhythmias. slide 1 of 5. About Arrhythmias An arrhythmia is an abnormal heart beat. Two groups of arrhythmia are bradycardia and tachycardia. Bradycardia is a heart rate slower than 60 beats per minute (bpm). Tachycardia is a heart rate faster than 100 bpm. Two forms of tachycardia are sinus tachycardia and supraventricular tachycardia. There is little difference between supraventricular tachycardia and sinus tachycardia.