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ehrlichiosis

A disease caused by a type of rickettsial organism (Ehrlichia canis being the most common); also called Tick Fever.

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Related Words

disease ; rickettsia


electrocardiograph (ECG or EKG)

A medical instrument used to assess cardiac function by measuring the electrical activity of the heart.  With each heartbeat, an electrical signal spreads from the top of the heart to the bottom.  As it travels, the signal causes the heart to contract and pump blood and sets the rhythm of the heartbeat. The process repeats with each new heartbeat. ECG detects these signals with electrodes that are placed on the body.  It shows how fast the heart is beating, whether the rhythm of the heartbeat is steady or irregular, and the strength and timing of electrical signals as they pass through each part of the heart.   


electrodiagnostics

Medical techniques used to record responses to electrical stimulation; used to diagnose and evaluate conditions affecting the neuromuscular, muscular, or nervous systems.

 


electroencephalography (EEG)

The recording of the electrical potentials emanating spontaneously from nerve cells in the brain.

Related Words
brain  ;  nerve

electromagnetic (EM) radiation

A self-propagating wave in space with electric and magnetic components.  These components oscillate at right angles to each other and to the direction of propagation, and are in phase with each other.  Electromagnetic radiation is classified into types according to the frequency of the wave.  These types include, in order of increasing frequency: radio waves, microwaves, terahertz radiation, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.  EM radiation carries energy and momentum, which may be imparted when it interacts with matter.  The waves with the higher frequency have shorter wavelengths and higher energy. 

Related Words
x-ray

electromyography (EMG)

The recording of the electrical activity in skeletal muscle.

 

embolus

A clot or other type of material (e.g. air, tumor cells, bacteria) carried by the blood in a blood vessel and forced into a smaller blood vessel resulting in an obstruction in circulation.


encephalitis

Inflammation of the brain.

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Related Words
brain  ;  inflammation

encephalomyelitis

Inflammation of the brain and spinal cord.

 

Related Words
brain  ;  inflammation  ;  spinal cord

encephalopathy

Any disease of the brain.

Related Words
brain  ;  disease


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