Glycosides digitaliques Flashcards

1
Q

Cible

A

Na+ K+ ATPase

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2
Q

Role de la Na-K-ATPase dans le couplage E-C

A
  • gradient de Na: entree = courant sodique (depolarisation)
  • phase tardive de la repolarisation: potentiel de repos
  • relaxation: sortie de Ca par NCX en echange de Na, evacue par la NaK
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3
Q

Effets des digitaliques

A
  • inotrope + (surcharge Ca, conductance K, raccourcit periode refractaire et PA)
  • parasympathicomimétique chronotrope - (sensibilise barorecepteurs, diminue FC, ralentit conduction NS et NAV)
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4
Q

Effets a dose toxique

A
  • troubles de conduction
  • arythmies auto-entretenues (TV, FV)
  • extrasystoles
  • bigeminisme
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5
Q

Marge therapeutique

A

0,7 - 1,7ng/ml

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6
Q

Effets toxiques extra-cardiaques

A
  • nausees, vomissement
  • hallucination
  • gynecomastie
  • dyschromatopsie
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7
Q

Elimination

A

renale

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8
Q

Faible dose

A
  • IR
  • patient age
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9
Q

Limiter toxicite

A
  • rehydrater
  • kaliemie corrigee
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10
Q

Antidote

A

Ac antidigoxine

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11
Q

Indications

A
  • FA
  • confort chez IC
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12
Q

C.I.

A
  • BAV
  • CMHO
  • WPW
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