1. 
   chronotropism
   Modification of the rate of a periodic movement, e.g., the heartbeat, through some external influence. ... Origin: chrono-+ G. Trope, turn, change ... Negative chronotropism, retardation of movement, especially of the heart rate. ... Positive chronotropism, acceleration of movement, especially of th...
   Found op http://www.mondofacto.com/facts/dictionary?chronotropism
   
   
2. 
   chronotropism
   (kro-not´ro-piz-әm) interference with regularity of a periodical movement, such as the heart's action.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   chronotropism
   chronotropism 1. Modification of the rate of a periodic movement, e.g., the heartbeat, through some external influence. 2. Interference with the regularity of periodic movement; such as, the heart beat. 3. An orientation response due to age; used particularly with reference to the movement of leave...
   Found op http://www.wordinfo.info/words/index/info/view_unit/2781/5
   
   
4. 
   chronotropism
   Type: Term Pronunciation: kro-not′rō-pizm Definitions: 1. Modification of the rate of a periodic movement, the heartbeat, through some external influence.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=17537
   
   

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