Base de électrophysiologie cardiaque Flashcards

1
Q

les cellules nodales

A

à l’origine du rythme cardiaque

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2
Q

les cellules du tissu conducteur

A

à l’origine de la propagation de l’influx nerveux

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3
Q

les cellules cardionectrices

A

tissu électrogénique

peu de myofibrilles

++ GAP

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4
Q

noeud sinusal

A

dans l’OD

donne impulsion électrique

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5
Q

noeud auriculo ventriculaire

A

unique passage du courant entre les oreillettes et ventricules

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6
Q

comment l’impulsion générée par le noeud sinusal atteint les ventricules ?

A

en passant par le noeud auriculo ventriculaire

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7
Q

l’artère du noeud sinusal + auriculo ventriculaire sont des branches de

A

l’artère coronaire droite

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8
Q

faisceau de His conduction

A

conduction est la + rapide

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9
Q

fibres de purkinje

A

vitesse de conduction ralentie pour avoir le tps de dépolariser chaque cardiomyocyte

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10
Q

potentiel de repos dépend de

A

3 ions

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11
Q

comment est chargé un cardiomyocyte ?

A

chargé positivement à l’extérieur et négativement à l’intérieur

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12
Q

effet chronotrope

A

adaptation de la fréquence cardiaque

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13
Q

effet dromotrope

A

adaptation de la vitesse de conduction

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14
Q

effet ionotrope

A

renvoie à la contractibilité cardiaque

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15
Q

effet bathmotrope

A

renvoie à l’excitabilité cardiaque

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