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pace·mak·er

n 1  :  a body part (as the sinoatrial node of the heart) that serves to establish and maintain a rhythmic activity  2  :  an electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart - called also pacer  .
 
 

 
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Rangely District Hospital (Rangely, Colorado - Rio Blanco County)