Radionuclide angiography (RNA) permits analysis of contractility and conduction abnormalities. We determined the parameters of normal ventricular synchronization, assessed the reproducibility of the technique, and compared first harmonic (1H) and third harmonic (3H) analysis. Forty-four normal subjects (28 men and 16 women) were studied. RNA was performed in left anterior oblique (LAO) and left lateral (LL) projections. The onset (To), mean time (Tm), total contraction time (Tt) for right ventricle (RV) and left ventricle (LV), interventricular time (T(RV-LV) = Tm(LV - Tm(RV)) in LAO, and the apex-to-base time (T(a-b)) in LL were measured on the histograms of the time-activity curve. Reproducibility (R) was tested by studying 26 consecutive patients with two successive RNAs. RV starts contracting 25 ms before LV (To(RV) = 29 +/- 37 ms; To(LV) = 54 +/- 39 ms; mean +/- SD) with a 37 ms longer total contraction time. T(RV-LV) is 3 +/- 16 ms. In LL projection, apex and base contract synchronously: T(a-b) = 2 +/- 16 ms. 3H analysis enlarges all duration parameters (To, Tm and Tt), but does not alter synchronization (deltaT(a-b) and deltaT(RV-LV) between 1H and 3H <1%, p = NS). Reproducibility of the duration (T(tLV) and T(tRv)) and synchronization parameters (T(a-b) and T(RV-LV)) is high (R < or = 2.2%). In conclusion, the simultaneous contraction of right and left ventricles and of apex and base can be quantified by RNA phase analysis with high reproducibility. These results, consistent with published electrophysiological data, provide the basis for further non-invasive investigations of ventricular resynchronization in patients with basal electrical or mechanical asynchrony.

Equilibrium gated radionuclide ventriculography is one of the most important fields of work in nuclear cardiology. The in vivo labelled method utilizing 99mTc and red cells labelled with pyrophosphate is one of the most widely used. In the present work determination of the optimum 99mTc activity was studied. A sample of 30 patients was divided into five groups which received various amounts of radioactivity: 303 MBq, 444 MBq, 617 MBq, 803 MBq and 1020 MBq. The image quality of each study was assessed qualitatively and by using a method based on the construction of an image quality discriminant function. The number of counts in regions of interest in the heart, liver, lung and spleen, and the background, were processed as variables. The best results for the selected variables were obtained with 803 MBq.

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Analyse processuelle : sociologie des parcours d'engagement Trajectoires religieuses Colorations politiques des engagements Engagements dans la violence Fanatiques religieux ou militants politiques ? Analyse psycho-émotionnelle : radicalisation et déni de reconnaissance Le sens subjectif donné à la violence Représentations de soi et de l'autre Représentations objectivées des autres Situations et variables sociologiques et normatives expliquant le sentiment d'impuissance et d'humiliation Grilles normatives Analyse cognitive de la radicalisation De faibles connaissances religieuses... … mais une vision géopolitique claire et structurée Un discours au simplisme attractif... … qui s'adapte aux codes culturels occidentaux Une vision eschatologique Un aspect cognitif surévalué à des fins de minoration de fragilités non assumées SYNTHÈSE 84 DES ENSEIGNEMENTS BIOGRAPHIQUES Tableau synthétique des djihadistes 85 Tableau synthétique des nationalistes 87 Éléments des synthèses : djihadistes 89 Les facteurs sociologiques 89 Les facteurs processuels 89 Les facteurs cognitifs 91 Les facteurs psychologiques 92 Analyse des synthèses nationalistes et éléments 93 de comparaison avec la radicalisation djihadiste Les facteurs sociologiques 93 Les facteurs processuels 93 Les facteurs cognitifs 94 Les facteurs psychologiques 95 VERBATIM : PAROLES DE DJIHADISTES ‫ل‬ l ‫م‬ m ‫ن‬ n ‫ه‬ h ‫ة‬ a/ah/ at ‫و‬ w/ū ‫ي‬ y/ī ‫ء‬ ' [1] Les individus placés en détention préventive ne sont pas accessibles sans l'accord des magistrats instructeurs.