Aagaard R, et al. - Researchers performed a comparison of the quality of focused cardiac ultrasound images obtained during rhythm analysis, bag-mask ventilations, and chest compressions. Compared to the images obtained during chest compressions, the quality of focused cardiac ultrasound images obtained during rhythm analysis and bag-mask ventilations was superior. Observations revealed that the quality of images obtained during rhythm analysis did not differ from images obtained during bag-mask ventilations. For image acquisition, bag-mask ventilations might constitute an overlooked opportunity during advanced life support.