RESUMEN
Supraventricular tachycardia (SVT) is the commonest tachyarrhythmia among paediatric age group. Modified Valsalva manoeuvre can be attempted in a stable child. We discuss here a case of a 6-year-old boy who presented with stable SVT and iced towel was applied to his face to revert the tachyarrhythmia. This method was well tolerated by the child without any complications. The SVT was successfully reverted, and pictures were taken to capture the simple but effective method.
Asunto(s)
Hielo , Taquicardia Supraventricular , Niño , Humanos , Masculino , Taquicardia Supraventricular/diagnóstico , Taquicardia Supraventricular/etiología , Maniobra de ValsalvaRESUMEN
Continuous-wave photoinjectors operating at high accelerating gradients promise to revolutionize many areas of science and applications. They can establish the basis for a new generation of monochromatic x-ray free electron lasers, high-brightness hadron beams, or a new generation of microchip production. In this Letter we report on the record-performing superconducting rf electron gun with CsK_{2}Sb photocathode. The gun is generating high charge electron bunches (up to 10 nC/bunch) and low transverse emittances, while operating for months with a single photocathode. This achievement opens a new era in generating high-power beams with a very high average brightness.