QT Flashcards

(12 cards)

1
Q

IKs

A

accessoire
s’active si Ikr devient débordé
réserve de repolarisation

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2
Q

tdp se manifeste par

A

convulsion
étourdissement
syncope

ce qui prédispose fibrillation ventriculaire et mort subite

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3
Q

bloquant Iks

A

indapamide
propofol
thiopental
isoflurane

fluoxétine

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4
Q

post dépolarisation précoce

A

due réentrée calcium

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5
Q

plus rythme cardiaque augmente

A

plus intervalle QT raccourcit

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6
Q

mesure QTC

A

> 460 = prolongé = 95%
420-460 = limite = 5%
< 420 = normal = < 1%

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7
Q

risque ++

A

surdosage
intx

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8
Q

faible bioD

A

rapidement
10 -> 60%
pire

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9
Q

forte bioD

A

tardivement
moins pire

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10
Q

facteurs de risque tdp

A

âge avancé
femme
hypoK
hypoMg
bradycardie
IC
IM
conversion récente FA
HVG
concentration élevée du rx
QTC anormalement prolongé
mutation génétique
hx familiale LQTS

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11
Q

concentration élevée inclut quoi

A

dosage inadéquat en IR ou IH
surdose
bolus rapide
intx

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12
Q

hx personnelle ou familiale

A

perte conscience ou convulsion après émotion ou activité physique
battement très rapide
mort subite nourrisson
décès subit < 50 ans

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