Erbelet al. EuropeanHeartJournal 2014tusar-centre-ouest.e-monsite.com › medias › files ›...

75
Anatomie Erbel et al. European Heart Journal 2014

Transcript of Erbelet al. EuropeanHeartJournal 2014tusar-centre-ouest.e-monsite.com › medias › files ›...

Page 1: Erbelet al. EuropeanHeartJournal 2014tusar-centre-ouest.e-monsite.com › medias › files › dr-le-ven...2014 ESC Guidelines on the diagnosis and treatment of aortic diseases. Erbelet

Anatomie

Erbel et al. European Heart Journal 2014

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ETT

Para-sternale Grand Axe: Racine + Aorte Ascendante

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ETT

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ETT

1 espace intercostal + haut: meilleure visualisation de l’aorte ascendante

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ETT

Supra Sternale: Crosse

Endapex: Segment III Sous-costale: Aorte Abdo

Evangelista et al. European J Echo 2010

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ETO

Ao I

VCS

Coupe 0-30° haute: Aorte ascendante

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ETO

Coupe 30° haute: Sinus de valsalva - coronaires

TCGCD

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ETO

Aorte

OG

VG

Coupe 120°: Racine + Aorte Ascendante

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ETO

Coupe 0° rotation sonde à l’opposé: Segment III

ANT

POST

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ETO

Coupe 90° rotation sonde à l’opposé: Segment III – longitudinal

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ETO

Coupe 0° rotation sonde à l’opposé – haute : Segment II

DISTAL

PROXIMAL

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ETO

SCG

Coupe 0° rotation sonde à l’opposé – haute : Segment II - SCG

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Méthodologie de mesure

Mesures en Diastole

Bord d’attaque à bord d’attaque

En 2D

Evangelista et al. European J Echo 2010

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Méthodologie de mesure

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Méthodologie de mesure

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Valeurs normales

Evangelista et al. European J Echo 2010; Roman et al Am J Cardiol 1989

Ao Asc : Nale < 21 mm/m2

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Influence de la corpulence

Roman MJ – Am J Cardiol 1989

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Influence de l’âge

Vriz et al. Am J cardiol 2014

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Influence du sexe

Vriz et al. Am J cardiol 2014

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Limites de l’échographie

Elefteriades et al. JACC 2010

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Limites de l’échographie

Elefteriades et al. JACC 2010

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Limites de l’échographie

Elefteriades et al. JACC 2010

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Pathologie Aiguë

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SAA: Répartition selon la pathologie

Salvolini et al. Eur J Radiol 2008

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Dissection aortique

• Clivage longitudinal de la paroi aortique au niveau de la média

• Jonction 1/3 ext; 2/3 int

• Porte d’entrée (déchirure intimale)

• Aiguë : ≤ 14 j après symptômes

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Dissection aortique

Erbel et al. European Heart Journal 2014

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DA: Comparaison ETT et ETO

• ETT: • Sensibilité 62%

• Spécificité 85 %

• ETO• Sensibilité 99 %

• Spécificité 98 %

• Mais ETT + rapide et – invasive !

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Comparaison Echo/IRM-CT

ETT/ETO IRM-CT

Flap + +

Vraie/Fausse lumière + +

Porte d’entrée + +/-

IAo + -

Epcht Péric + +

Syndr Malperfusion - +

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DA: Fiabilité des techniques

Nb d’études Sens Spec

ETO 10 98% 95%

AngioScanner 3 100% 98%

IRM 7 98% 98%

Shiga T et al. Arch Int Med 2006

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DA: Diagnostic Echo

• Buts de l’examen:• Confirmer la dissection

• Préciser type (A/B/extension)

• Préciser site(s) de la (des) portes d’entrées

• Préciser l’existence de complications:o Dissection coronaire

o IA (mécanisme/sévérité

o Epanchement péricardique

o Hématome médiastinal

o Epanchement pleural

� Eléments essentiels pour la discussion médico-chirurgicale

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Voile intimal = maître signe

• En TM• Double trait ± mobile• Dédoublement de la paroi aortique

• En 2D• Image linéaire intraluminale ± longue ± mobile

• Faux positifs• Réverbération• Plaque athéromateuse

• Faux négatifs• Forme localisée• Thrombose complète du faux chenal

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DA segment II: voile intimal

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DA type I: ETT PSG transverse

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Flap segment III sous costale ETT

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DA type I: voile intimal/portes d’entrée

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DA: ETT segment II et III

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DA: pièges diagnostics

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Vrai et faux chenal

Le faux chenal est généralement

• externe

• Plus large que le vrai

• Le siège de flux à basse vitesse

• Le siège de contraste spontané et de thrombose

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DA type I: vraie et fausse lumière

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Porte d’entrée

• Solution de continuité dans l’intima

• Présence d’1 flux couleur

• Faux chenal ± perméable

• Parfois borgne sous tension

• Parfois réentrées

Aorte horizontale 10%

Aorte

ascendante

65% Aorte

descendante

20%

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DA: porte d’entrée

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DA: porte d’entrée

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DA: Complications

• Insuffisance aortique : 60 % des types I et II• Mécanisme à préciser

• Quantification en doppler

• Extravasation périaortique

• Épanchement péricardique

• Atteinte coronaire et vx périphériques

• Étude de la fonction VG• HTA

• IDM

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Mécanismes de l’IA dans la DA

n = 12

n = 8

n = 3

Iao modérée/sévère N= 23/50

Ne sont pas réparables

- Marfan- Bicuspidie- “aortite”

Normal = 27/50

Movsowitz et al. JACC 2000

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DA: IA Sévère

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DA: IA sévère

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DA: prolapsus du flap

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L’ETO n’est pas sans risque

• Patient traité médicalement• Beta bloquants

• Antihypertenseurs

• Patient sédaté ++

� Prémédication cruciale +++

Erbel et al. European Heart Journal 2014

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DA : Traitement

Erbel et al. European Heart Journal 2014

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Surveillance d’une dissection

• Dissection non opérée• Persistance des 2 chenaux : 75 % des cas

• Extension antérograde ou rétrograde possible

• Persistance de la porte d’entrée

• Dilatation progressive de l’aorte

• Dissection opérée• Persistance des 2 chenaux : 75 % des cas

• Thrombose autour du tube prothétique

• Faux anévrysme au niveau des sutures

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Ex: Faux-anevrysme après Bentall

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Ex: Faux-anevrysme après Bentall

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Hématome intra-mural

• Etiologie rare de syndrome douloureux thoracique

• Retrouvé dans 10% des DA

• 90 % des patients ont 1 HTA

• Diagnostic écho• Refoulement de l’intima (Ca++) vers la lumière de l’aorte• Élargissement non spécifique du calibre aortique• Épaississement en croissant de la paroi aortique > 5 mm• Absence de rupture intimale• Absence de flux

• Siège : Aorte desc (2/3 cas) ou asc (1/3)

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Hématome paroi

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Hématome paroi

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Hematome paroi segt III

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Hematome intra-mural

Evangelista et al. European J Echo 2010

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HIM: Evolution

• Stabilisation, voire régression (1/3)

• Progression de l’hématome, Dissection aortique (1/3)

• Rupture de la paroi externe (1/3)

• Dilatation anévrysmale ou pseudo-anévrysmale

• Pronostic assez voisin des DA:• Mortalité hospit : 21% (HIA) vs 24% (DA)

• Si type I : 39% (HIA) vs 30% (DA)

• Si type III : 8% (HIA) vs 13% (DA)

Registre IRAD (n=58 pts) – Evangelista A et al. Circulation 2005

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HIM: traitement

• Type A: Chir urgente• Type B: Medical• Type B compliqué: plutôt TEVAR• Contrôle +++ de l’évolutivité : 1, 3,

6, 9, 12 mois si médical

Evangelista A et al. Circulation 2005; Erbel et al. European Heart Journal 2014

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Ulcère pénétrant athéromateux

• D’abord décrit comme cause possible de dissection (Shennan, 1934)

• Plaque athéromateuse, unique ou multiple, dont l’ulcération finit par déchirer la média

• 7 à 10% des aortes douloureuses

• Siège : aorte thoracique descendante ++

• Age moyen 70 ans

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Echographie cardiaque (ETO)

•Cratère à bords irréguliers, sur aorte athéromateuse, souvent dilatée

•Complications : hématome intra-mural, dissection

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Evolution

• Hématome intra-mural

• Pseudo-anévrysme adventiel

• Extension de l’ulcération, à l’origine d’une véritable dissection (17 à 40%), surtout UP localisés sur l’aorte ascendante

• Développement d’un anévrysme, souvent sacculaire

Indications opératoires ≈ HIM

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Evolution

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Rupture Traumatique de l’Aorte (isthme +++)

Guidelines for treatment ot traumatic aortic injuryJ Vasc Surg – 2011

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Quand suspecter 1 RTA ?

- polytraumatisé ou trauma thoracique sévère

- décélération horizontale- décéleration verticale

- et/ou élargissement du médiastin supérieur (8 cm)

- Flap intimal épais (intima + média), mobile à l ’intérieur de la lumière

- Dilatation localisée et déformation des contours de l ’aorte sous tension (paroi réduite à l ’adventice)

Diagnostic Echographique (ETO) :

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Rupture totale

- Présence d'1 écho intraluminal circulaire, épais,battant localisé- Déformation aortique localisée- Flux de part et d'autre de la déchirure avec présence d'1 aliasing- Hématome mediastinal

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Rupture subtotale

- Présence d'1 écho intraluminal linéaire, épais, battant localisé- Déformation aortique localisée- Flux de part et d'autre de la déchirure avec aliasing couleur- Hématome médiastinal

Page 69: Erbelet al. EuropeanHeartJournal 2014tusar-centre-ouest.e-monsite.com › medias › files › dr-le-ven...2014 ESC Guidelines on the diagnosis and treatment of aortic diseases. Erbelet

RTA : rupture partielle

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RTA isthmique: faux anévrysme

Page 71: Erbelet al. EuropeanHeartJournal 2014tusar-centre-ouest.e-monsite.com › medias › files › dr-le-ven...2014 ESC Guidelines on the diagnosis and treatment of aortic diseases. Erbelet

Rupture partielle

- Présence d'1 écho intraluminal linéaire, épais, battant, localisé- Déformation aortique localisée inconstante- Présence d'1 aliasing- Hématome médiastinal

Page 72: Erbelet al. EuropeanHeartJournal 2014tusar-centre-ouest.e-monsite.com › medias › files › dr-le-ven...2014 ESC Guidelines on the diagnosis and treatment of aortic diseases. Erbelet

Hématome mediastinal

Vignon Chest 1998; Slama Arch mal cœur 1997

- D1 > 5.5 ou D2 > 6.6 a 1 sens de 80 % et 1 specif de 92 % pour 1 RTA- Evolution : diminution ou disparition ds 80 % des cas,- Pas de surmortalite si pas de RTA

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RTA : prise en charge

TEVAR (tt endovasc) (mort 9%) > open aortic repair (19%) > tt med (46%)

Erbel et al. European Heart Journal 2014

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Conclusion

• L ’ETT et surtout l ’ETO demeurent des techniques difficilement contournables dans l’exploration de l’aorte thoracique

• L’exploration ultrosonore intervient cependant en complément des autres techniques d’imagerie (angioscanner, IRM), notamment pour la crosse aortique et l’aorte descendante

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Bibliographie

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Echocardiography in aortic diseases : EAE recommandations for clinical practice. Evangelista A et al – Eur J Echocardiogr 2010;11:645-58

2010 ACCF/AHA/AATS/ACR/ASA/SCA/SCAI/SIR/STS/SVM Guidelines for the Diagnosis and Management of Patients With Thoracic AorticDisease J Am Coll Cardiol. 2010 Apr 6;55(14):e27-e129

Two-dimensional echocardiographic aortic root dimensions in normal children and adults . Roman MJ et al – Am J Cardiol 1989;64:507-12

Diagnosis and management of aortic dissections . Recommandations of the task force on aortic dissection. ESC. Erbel R et al . Eur Heart J 2001;22:1642-81

Echocardiography in the emergency assessment of acute aortic syndromes . Meredith EL et al . Eur J Echocardiogr 2009;10:121-9

Diagnostic accuracy of TEE, helical CT and magnetic resonance imaging for suspected thoracic aortic dissection. Systematic review and meta-analysis. Shiga T et al. Arch Int Med 2006;166:1350-6

The French Study of Aortic Plaques in stroke group : atherosclerotic disease as a risk factor for recurrent ischemic stroke . N Engl J Med 1996;334:1216-21