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Résumé UE 2.8 S3 : Obstructions artérielle / veineuse

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Il s'agit d'un cours réalisé dans la cadre de l'UE 2.8 S3

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UE 2.8 S3 : OBSTRUCTION ARTÉRIELLE ET VEINEUSE
Circulation artérielle et veineuse :
 Artère  Veine
- Petit volume - Grd volume
- Grd pression = vitesse élevée - Faible pression = vitesse
- Parois épaisse faible
- Paroi fine
- Réseau unique
- Suppléances limitées - Réseau surnuméraire
- Gravité de l’occlusion - Réseau profond + superficiel
- Arthrosclérose - Gravité de l’embolie
- Varices
Thrombose = prd final de la coagulation, formation d’un thrombus (occlusif ou non) dans tt
territoire vasculaire (artère, veines, capillaires, …).

Causes :

Artérielle Veineuse
Lésion endothéliale : Hypercoagulabilité :
- Anomalie valvule veineuses - Cancer
- Trauma / chirurgie - Grossesse, post-partum
- Kt - Thérapie à base d’estrogènes
- Sepsis
- Thrombophilie

Anomalie flux sanguin :
- Dysfonction ventriculaire
- Immobilisation / paralysie
- Varices
- Obstruction / compression tumorale
- Obésité
- Grossesse

Physiopathologie :

Thrombose artérielle Thrombose veineuse
1) Ulcération de la plaque athérosclérose 1) Altération pariétale
2) Exposition du sous-endothélium 2) Stase
3) Agrégation plaquettaire 3) Hypercoagulabilité




Maladie Veineuse Thrombo-Embolique (MTEV)

Thrombose veineuse = inflammation aigue d’une veine entrainant l’obstruction par un caillot
dont l’extrémité libre peut se détacher + provoquer EP.
 Revoir signes

Troponine = marqueur de lyse !!

Intérêt de la dbl agrégation plaquettaire :
- Éviter formation d’un thrombus au niv du stent (dbl = amélioration des résultats)
- En prévention d’autres risques d’agrégation plaquettaire


Obstruction artérielle : AOMI


1

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September 16, 2026
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