10. 
    pacemaker
    electronic cardiac-support device that produces rhythmic electrical impulses that take over the regulation of the heartbeat in patients with certain ... [4 related articles]
    Found op http://www.britannica.com/eb/a-z/p/1
    
    
11. 
    pacemaker
    an object or substance that influences the rate at which a certain phenomenon occurs; often used alone to indicate the natural cardiac pacemaker or an artificial cardiac pacemaker. In biochemistry, a substance whose rate of reaction sets the pace for a series of interrelated reactions.
    Found op http://users.ugent.be/~rvdstich/eugloss/DIC/dictio63.html
    
    
12. 
    pacemaker
    Type: Term Pronunciation: pās′māk-ĕr Definitions: 1. Biologically, any rhythmic center that establishes a pace of activity. 2. An artificial regulator of rate activity. 3. In chemistry, the substance of which the rate of reaction sets the pace for a series of chain reactions; th...
    Found op http://www.medilexicon.com/medicaldictionary.php?t=64326
    
    
13. 
    Pacemaker
    [running] A pacemaker or pace-setter (sometimes colloquially called a rabbit) is a runner who leads a middle- or long distance running event for the first section to ensure a fast time and avoid excessive tactical racing. Pacemakers are frequently employed by race organisers for world record...
    Found op http://en.wikipedia.org/wiki/Pacemaker_(running)
    
    
14. 
    Pacemaker
    [disambiguation] An artificial pacemaker is a medical device that uses electrical impulses to regulate the beating of the heart. Pacemaker may also refer to: ==Medicine== ==Other uses== == See also == ...
    Found op http://en.wikipedia.org/wiki/Pacemaker_(disambiguation)
    
    
15. 
    pacemaker
    body part, such as the sinoatrial node of the heart, that serves to establish and maintain, involuntarily, rhythmic electrical activity
    Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=891-02-11
    
    
16. 
    pacemaker
    Contents • Who needs a pacemaker? • How it works • During surgery • After surgery • Risks • Lifestyle effects Pacemaker Image credit: Medtronic A pacemaker is a small device that's placed under the skin of the chest or abdomen to help control abnormal hear...
    Found op http://www.daviddarling.info/encyclopedia/P/pacemaker.html
    
    
17. 
    Pacemaker
    A pacemaker is a small battery-operated electronic device that is used to help the heart beat regularly. Can be used in the treatment of arrhythmia. (Read about 'Arrhythmia')
    Found op http://www.stayinginshape.com/3osfcorp/libv/h15.shtml
    
    
18. 
    Pacemaker
    The cardiac pacemaker.a small area of specialized tissue within the wall of the right atrium of the heart whose spontaneous electrical activity initiates and controls the beat of the heart. An artificial pacemaker is an electronic device that stimulates the heart muscles by delivery small electric s...
    Found op http://www.probertencyclopaedia.com/browse/EP.HTM
    
    
19. 
    pacemaker
    In vertebrates, a group of muscle cells in the wall of the heart that contracts spontaneously and rhythmically, setting the pace for the contractions of the rest of the heart. The pacemaker's intrinsic rate of contraction is increased or decreased, according to the needs of the body, by stimulation ...
    Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0006201.html
    
    
20. 
    PACEMAKER
    Nerve tissue that controls the heart's rate of contraction and relaxation; also known as the sinoatrial node. An artificial pacemaker is an electrical device implanted surgically to treat abnormally slow heart rhythms (bradycardias).
    Found op http://www.thehorse.com/Glossary.xhtml?L=P
    
    
21. 
    pacemaker
    (pas;ma;ker) A group of cells that has the fastest spontaneous rate of depolarization and contraction in a mass of electrically coupled cells; in the heart, this is the sinoatrial, or SA, node.
    Found op http://www.mhhe.com/biosci/abio/glossary.mhtml
    
    
22. 
    pacemaker
    (pas;ma;ker) A group of cells that has the fastest spontaneous rate of depolarization and contraction in a mass of electrically coupled cells; in the heart, this is the sinoatrial, or SA, node.
    Found op http://www.mhhe.com/biosci/abio/glossary.mhtml
    
    

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