chronotropism

chronotropism
Modification of the rate of a periodic movement, e.g., the heartbeat, through some external influence. [chrono- + G. trope, turn, change]
- negative c. retardation of movement, especially of the heart rate.
- positive c. acceleration of movement, especially of the heart rate.

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chro·not·ro·pism krə-'nä-trə-.piz-əm n interference with the rate of the heartbeat

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chro·not·ro·pism (kro-notґro-piz-əm) modulation of the regularity of a periodic movement, such as the heart beat.

Medical dictionary. 2011.

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Look at other dictionaries:

  • chronotropism — chro·not·ro·pism …   English syllables

  • chronotropism — krəˈnä.trəˌpizəm noun ( s) Etymology: chron + tropism : interference with the rate of the heartbeat …   Useful english dictionary

  • Diastolic depolarization — In mammals cardiac electrical activity originates from specialized myocytes of the sinoatrial node (SAN) which generate spontaneous and rhythmic action potentials (AP). The unique functional aspect of this type of myocyte is the absence of a… …   Wikipedia

  • chronotropic —   a. affecting rate of pulse.    ♦ chronotropism, n …   Dictionary of difficult words

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