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L'ANGINE DE POITRINE EST UN PRECONDITIONNEMENT ISCHEMIQUE AVANT LA CHIRURGIE DE REV ASCULARISATION CORONARIENNE CHEZ LES PATIENTS DE GENRE MASCULIN.

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UNIVERSITE SAINT-ESPRIT DE KASLIK FACULTE DE MEDECINE

L'ANGINE DE POITRINE

EST UN PRECONDITIONNEMENT ISCHEMIQUE AVANT LA CHIRURGIE DE

REV ASCULARISATION CORONARIENNE CHEZ LES PATIENTS DE GENRE MASCULIN.

These en vue d'obtention d'un doctorat en medecine preparee par

GHIYE Rayanne

So usIa direction duD. MANSOUR Ziad ( chirurgien cardio-vasculaire)

KASLIK-LIBAN 2013-2014

Soutenue le 16 Ma~ 2014 devant le jury compose de

Dr. Boutros Alam Membre

Dr. Georges Choueiry Membre

Dr. Antoine Kosseify

Dr. Nicolas Msallem

Dr. Georges Teddy

President Rapporteur

Membre invite du jury

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Resume

Objectifs: Demontrer que l'angine de poitrine agit comme un preconditionnement chez la population masculine dans la chirurgie coronaire.

Methodes : T ous les patients qui ont subi une revascularisation coronaire chirurgicale sous circulation extra-corporelle de janvier 2003 a janvier 2013 au CHU de Strasbourg ont ete consideres. Ont ete exc1u les patients ayant un infarctus du myocarde confinne et les patients de genre feminin. Les patients sont divises en 2 groupes selon l'angine : symptomatiques et asymptomatiques.

Resultats: Nous avons etudie 2221 patients de genre masculin ayant eu une revascularisation coronarienne chirurgicale. Parmi eux, 1660 ont ete

symptomatiques et 561 asymptomatiques. Les groupes ont ete homogenes concernant l'age, le diabete et 1a fraction d'ejection du ventricu1e gauche. Les patients symptomatiques avaient plus d'intoxications tabagique, de dyslipidemie, d'hypertension, et plus d'anastomoses distales.

En postoperatoire, la troponine a ete moindre chez les patients symptomatiques que ce soit ala 6eme heure (4.2±10.6 vs 6.20±17.3; p=0.004) ou ala 24eme heure (8.8±24.9 vs 12.02±33.6 ; p=0.033).

La mortalite intra-hospitaliere chez les patients symptomatiques a ete moindre (1.8% vs 3.4%; p=0.024), ainsi que !'incidence de l'insuffisance renale (6.1% vs 9.4%; p=0.006)

Conclusion: L'angine de poitrine, par le biais du preconditionnement, protege le creur et l'organisme de la morbi-mortalite de la chirurgie coronarienne sous circulation extra-corporelle chez les patients de genre masculin.

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Abstract:

Objectives: Prove that angina pectoris has a preconditioning effect in male patients undergoing a coronary surgery.

Methods: All patients undergoing on-pump coronary artery revascularization surgery between January 2003 and January 2013 in Strasbourg university hospital has been considered.

All patients who presented with a confirmed necrosis, and all female patients were excluded. Patients were divided into two groups according to angina pectoris:

symptomatic and asymptomatic.

Results: We studied 2221 male patients having had a surgical coronary revascularization, among which 1660 were symptomatic and 561 were

asymptomatic. Both groups were homogeneous in terms of age, diabetes, and left ventricular ejection fraction. Symptomatic patients were more tobacco smokers, dyslipidemic, hypertensive, and had more distal anastomoses.

Postoperatively, troponin levels were less in symptomatic patients at postoperative hours 6 (4.2±10.6 vs 6.20±17.3; p=0.004) and 24 (8.8±24.9 vs 12.02±33.6;

p=0.033).

Intra-hospital mortality (1.8% vs 3.4%; p=0.024) and incidence of renal failure (6.1% vs 9.4%; p=0.006) were less in symptomatic patients.

Conclusion: Angina pectoris preconditions the heart and the organism from the adverse effects of on-pump coronary surgery in male patients.

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Plan de Ia These

I. Avant-Propos ... ... 4 II. Rappel. ... 8

A. L'ischemie B. La reperfusion

C. Le preconditionnement ischemique local D. Le preconditionnement ischemique

a

distance

III. Ischemies myocardiques d'origine coronariennes ... .14

1. Physiopathologie

2. Circulation coronaire atheromateuse

IV. Angor d'origine non atheromateuse: Angor spastique ... 22 V. Materiels et methodes ... 23

A. Collecte des donnees B. Techniques operatoires C. Statistiques

VI. Resultats ... ... 2 7 A. Caracteristiques demographiques

B. Etude d'homogeneite

C. Resultats biologiques postoperatoires D. Resultats cliniques postoperatoires

VII. Discussion ... ... ... ... 31 VIII. Conclusion ... ... 34 IX. References ... 35

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