IC inhib pompe Na (tonicardiaque) Flashcards

1
Q

mécanisme inhib pompe Na dans IC

A

inhib Na/K/ATPase -> fixe partie extra cellulaire phosphorée
augmente Na intracell = entrée Ca
augmente force contraction ❤️ et muscles lisses
diminue polarisation c tissu nodal

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2
Q

PDYN inhib pompe Na dans IC

A

coeur :
augmente Ca = isotrope et tonotrope + = augmente Dc
chrono et dromotrope -
bathmotrope +

vasculaire :
augmente RPV
diminue hyperactivité adrénaline, vasodilatateur indirect

autres :
augmente diurèse
diminue stimulation SRA

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3
Q

médoc IC inhib pompe Na

A

digoxine

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4
Q

digoxine

A

digoxine nativelle
hémigoxine nativelle

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5
Q

PKIN IC inhib pompe Na

A

distribution : peu lié (25%) = hydrosoluble
excrétion : rénale sous forme inchangée ++
t1/2 = 36h
index thérap étroit

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6
Q

indication inhibe pompe Na IC

A

IC
trouble rythme supra-ventriculaire

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7
Q

effets indésirables inhib pompe Na IC

A

doses-dépendants
fréquents : troubles dig, céphalées, insomnies
surdosage : cardiaques

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8
Q

interaction inhib pompe Na IC

A

supplémentation en Ca -> renforce effet digoxine
hyperK -> toxicité digoxine
neuroleptiques : augmente risque torsade de point avec digoxine

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