[A rare cause of type 2 non-ST-elevation myocardial infarction: Cardiac compression and left ventricular obstruction by a giant hiatal hernia]. / Une cause rare d'infarctus du myocarde sans sus-décalage du segment ST de type 2 : compression cardiaque et obstruction intraventriculaire gauche par une volumineuse hernie hiatale.

We report the case of a 89 year-old woman admitted to the emergency department for epigastric pain, nausea, vomiting. Because of a circulatory failure with electrocardiographic ST changes and a slight elevation of ultra-sensible troponin, a coronary angiography was performed and found normal coronary arteries. Thoraco-abdominal CT scan revealed a large hiatal hernia causing a cardiac compression, and a left intraventricular obstruction showed by Doppler echocardiography. All signs resolved after fasting and gastric drainage.

Onboard wake vortex localization with a coherent 1.5 µm Doppler LIDAR for aircraft in formation flight configuration.

An onboard LIght Detection And Ranging (LIDAR) sensor designed to track wake vortex created by aircraft in formation flight is presented. It uses short pulses (75 ns) to obtain a spatial resolution of ∼22.5 m required to resolve small-scale structures of vortices and a blind zone of 17.5 m to locate vortices next to the wing tip. Monte Carlo simulations show that vortex centers could be located within ±0.5 m. Flight tests were performed with two aircraft in formation flight configuration. The LIDAR, installed in the following aircraft, was able to measure, in real time (every 6 s), the air flow velocities induced by the vortices created by the leading aircraft. The software was used to determine the vortex centers. These measurements were coupled to global positioning system (GPS) measurements of the two aircraft positions to determine the falling velocity of the vortices and infer their circulations.

Eyesafe coherent detection wind lidar based on a beam-combined pulsed laser source.

We report on a coherent wind lidar built with two coherently-beam-combined fiber amplifiers. The lidar performances of the combined-amplifier and the single-amplifier are compared using two criterions: carrier-to-noise ratio and wind speed noise floor. In both cases, lidar performances are not degraded with a combined source and are close to the theoretical optimum. Combined sources are well suited to improve coherent wind lidar accuracy, range, and integration time.

[Antibiotic sensitivity of Streptococcus group B]. / Sensibilité aux antibiotiques des streptocoques du groupe B.

The minimal inhibitory and bactericidal concentration of 18 antibiotics for 412 isolates of group B streptococci from newborns, mothers or pregnant women were determined. 3.2% of these strains were less susceptible to penicillin G, 1% failed to be inhibited by erythromycin and 1% by chloramphenicol. Antibiotic-killing kinetics was studied with beta-lactams, aminoglycosides, and in combination for 20 isolates. Killing was accelerated by the combination. For these reasons, at least at the beginning of the treatment, the association of ampicillin and an aminoglycoside can be recommended.