ecgdiapo 131108130805-phpapp01
TRANSCRIPT
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FORMATION A LA LECTURE DE
L’ECG
10 messages incontournables
Dr Mahmoudi.F Eloued
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ne pas passer à côté d’un IDM !!! sus décalage ST ≠ IDM !!! onde T négative ≠ urgence !!! Bradycardie ≠ urgence atropine
!! Tachycardie ≠ injection IV HVG BBG BBD ≠ urgence
OBJECTIF
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0
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P
QRS
T
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1
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25 10
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2
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Sténoses coronaires sévères ?
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l’ECG ne détecte pas toute cardiopathie
Un ECG normal n’élimine pas une
cardiopathie
un ECG normal n’élimine pas « surtout » une coronaropathie
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3
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Le rythme ?Mécanisme électrophysiologique à l’origine
de la contraction des ventricules. A ne pas confondre avec la fréquence cardiaque qui est le nombre de battements par minute.
Sinusal ?Rythme qui naît des cellules du nœud sinusal.
Les impulsions sont transmises aux ventricules et responsables de leurs dépolarisations
LE RYTHME
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chaque complexe QRS est précédé par une onde P et chaque onde P est suivie par un complexe QRS. L’onde P doit avoir les caractéristiques d’une onde P sinusale …
D2 V1
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D2 + V1
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4
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Onde P visible
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P pulmonaire
P large
P mitrale
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Dissociation AV
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5
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Onde P absente
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EXTRASYSTOLE
VENTRICULAIRE
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tachyACFA
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6
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QRS LARGE0.11-0.12s
Un QRS large en rythme sinusal évoque :
-un trouble de conduction intraventriculaire
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BBG BBD
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BBD
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BBG
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7
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Segment ST
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Point J
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DECALAGE ST
sus
sous
J
J
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Troubles secondaires de repolarisation
tachycardie,bloc de branche, surcharge ventriculaire ouhypertrophie ventriculaire, faisceau accessoire, stimulateur cardiaque
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TERRITOIRES …
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AVEC LE TEMPS ….!!
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RABOTAGE DE L’ONDE R
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8
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ONDES
R . S
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9
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TACHYCARDIE
A QRS FINS
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10
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LA MORT
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TV
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MERCI