[Complicated transcatheter aortic-valve endocarditis with abscess and pseudoaneurysm: Value of the ECG-gated multidetector computed tomography angiography]. / Endocardite infectieuse sur TAVI compliqué d'abcès et pseudo-anévrysme : apport du scanner cardiaque synchronisé à l'ECG.

A 80-year-old man was admitted to catheterization room for an acute infero-lateral ST-elevation myocardial infarction (STEMI). Coronary angiography showed a thrombotic occlusion of the second left marginal branch, and normal other coronary arteries. The thrombo-embolic mechanism of the STEMI, and the infectious context in this patient who had had a transcatheter aortic valve implantation (TAVI) two months earlier, led us to suspect a bioprosthesis endocarditis. It was confirmed by transthoracic and transoesophageal echocardiography, which showed an aortic-mitral curtain abscess and aortic bioprosthesis vegetations, associated to Enterococcus faecalis bacteriemia. In order to specify the diagnosis, an ECG-gated multidetector CT angiography (MDCTA) had been performed. Additionally to echocardiographic findings, MDCTA showed a pseudo-aneurysm, sized 20 to 22mm, beginning from the outflow tract of the left ventricle to end on the antero-lateral face of the aorta. The patient was referred for emergency aortic bioprosthesis removal and replacement. Through this case, MDCTA showed its importance for the diagnosis and the prognostic evaluation of cardiac prosthesis endocarditis. MDCTA provided additional informations that echocardiography could not detect, because of artifacts caused by the prosthetic material and calcifications, frequent in elderly patients with comorbidities.

[Evolution of the interventional reperfusion strategy and reperfusion times in acute ST-segment elevation myocardial infarction]. / Évolution de la prise en charge interventionnelle et des délais de reperfusion à la phase aiguë de l'infarctus du myocarde avec sus-décalage du segment ST.

BACKGROUND: In patients with acute ST-segment elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (pPCI), the recommended times (first medical contact-to-balloon (M2B) <120 or <90min, and door-to-balloon (D2B) <45min) are reached in less than 50% of patients. PURPOSE: To compare the interventional reperfusion strategy and reperfusion times between two series of consecutive STEMI patients referred for pPCI within 12hours of symptom onset, in 2007 and 2012. METHODS: Retrospective study of 182 patients, 87 admitted from January 2007 to March 2008 (period 1), and 95 admitted from January to December 2012 (period 2). The procedural characteristics and the different times between onset of pain and mechanical reperfusion were gathered and compared by non-parametric tests. RESULTS: Radial access, thromboaspiration, and drug eluting stents were more frequent, and cardiogenic shock was less common during period 2, compared with the period 1. The median time from first medical contact to balloon (M2B) decreased by 26% (135min, [quartiles: 113-183] in 2007 versus 100 [76-137] in 2012, P<0.001), in relation to the reduction in both prehospital times and time in the catheterization laboratory (D2B: 51 [44-65] and 44min [37-55], respectively, P<0.01). CONCLUSIONS: The D2B and M2B times significantly decreased in our centre between 2007 and 2012, and reached the recommended values in >60% of the cases. This may be explained by better coordination between emergency medical units and interventional cardiologists, and by the presence of two paramedics in the catheterization laboratory for 24/24 7/7 pPCI since 2010 in France, in accordance with recent national regulation.