AED

Aed or AED may refer to:

Automated external defibrillator

An automated external defibrillator (AED) is a portable electronic device that automatically diagnoses the life-threatening cardiac arrhythmias of ventricular fibrillation and ventricular tachycardia in a patient, and is able to treat them through defibrillation, the application of electrical therapy which stops the arrhythmia, allowing the heart to reestablish an effective rhythm.

With simple audio and visual commands, AEDs are designed to be simple to use for the layperson, and the use of AEDs is taught in many first aid, certified first responder, and basic life support (BLS) level cardiopulmonary resuscitation (CPR) classes.

Usage

Conditions that the device treats

An automated external defibrillator is used in cases of life-threatening cardiac arrhythmias which lead to cardiac arrest. The rhythms that the device will treat are usually limited to:

Saint John

Saint John or St. John usually refers to John the Apostle of the Bible.

Saint John may also refer to:

People

Tõnis Mägi

Tõnis Mägi (born 18 November 1948 in Tallinn) is an Estonian singer, guitarist, composer and actor. He is one of the most influential and remarkable names in Estonian rock music of the past 40 years.

He grew up in a musical family and became interested in music during his early childhood. While attending in the Tallinn 22nd High School (now Jakob Westholm Gymnasium) he started performing as the choir's soloist in the early grades. After learning to play guitar, Mägi started his musician career as a guitarist in school bands Juuniorid (1965) and Rütmikud (1966). After serving in the compulsory Soviet Army he became the vocalist of Baltika. Later he sang in the bands Kärjed, Laine, Muusik Seif, 777 and Ultima Thule.

In the 1970s and 1980s, Mägi gained big popularity not only in Estonia, but in the whole Soviet Union. One of his most popular songs Olimpiada (Олимпиада) became a symbol of the 1980 Moscow Olympics. In 1987, he gave his last concert in Russia, after which he returned to Estonia and focused on the Singing Revolution. Among other patriotic songs of the time, Mägi's song Koit (Estonian for Dawn) became a symbol of freedom.

St. John Ambulance

St John Ambulance is a trade name used by a number of affiliated organisations in different countries, counties, states or provinces dedicated to the teaching and practice of medical first aid and the provision of ambulance and community volunteer services, all of which derive their origins from the St John Ambulance Association founded in 1877 in the United Kingdom. The active uniformed first-aiders known as the St John Ambulance Brigade or Community Services were introduced in 1887. There are now more than 500,000 such volunteers worldwide. The brand name and logo are owned by the Most Venerable Order of the Hospital of St John of Jerusalem with the international office located in London, England. Logos may vary in each country but always contain the eight-pointed Maltese Cross as the essential identifier.

The membership aspect of St John Ambulance is largely ranked, and members fall into a hierarchical structure of reporting. Ranks run from corporals, through sergeants and officers all the way up to high national ranks, but there is significant variation between Priories and it is hard to generalise the structure too much from an international perspective.