cronotropic incompetence

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Author:
jordan1128
ID:
240853
Filename:
cronotropic incompetence
Updated:
2013-10-15 19:46:48
Tags:
CI
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Description:
CI
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  1. Define of chronotropic incopmpetence
    inability of the heart to regulate its rate appropriatley in response to physiologic stress (metabolic demand)
  2. Chronotropic incompetence is the inability to do what three things?
    • 1. accelerate rate
    • 2. maintain rate
    • 3. decelerate rate
  3. Chronotropic Incompetence is a Class what classification?
    Class One
  4. CI is inability at the peak of excerice to get above ?
    120 ppm
  5. 5 possible causes of CI
    • 1. age related sinus node dysfunction
    • 2. secondary to other cardiac diseases
    • 3.medication side effect (beta blockers, calcium channel blockers, digitalis)
    • 4.autonomic dysfunction
    • 5.endocrine-metabolic diseases
  6. Less-active, less fit subjects require ___________ submaxima rate supprt
    more aggressive
  7. Tidal Volume
    • volume of air inhaled and exhaled in one breath
    • Rest: 0.5-1 liter
    • Exercise: 2-5 liters
  8. Minute Ventilation
    tidal volume * respiratory rate
  9. Respiratory Rate
    amount of breaths in one minute

    Rest: 10-16 breath

    Exercise: 20-60
  10. What is the best sensor?
    a functioning sinus node
  11. 3 main causes of CI
    • aging
    • drugs
    • heart disease
  12. Ideal sensor has these quailities
    • no special lead
    • automatic tailoring of therapy
    • supports broad range of lifestyles
    • physiloigc response
    • supports rates at rest, daily activities, exertion
  13. 1st rate responsive pacemaker
    activitrax (medtronic)
  14. acceleromoter
    used by every company today!
  15. Minute Ventilation
    • Boston Scientific
    • Sorin
  16. Closed Loop Stimulation
    Biotonik
  17. Blood Temperature Device
    • Kelvin
    • Intermedics

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