Fig. 2.

5th intercostal space in pre-arrest (left column), arrest (center column) and late arrest (right column). Top row displaying image capture by the bladder scanner (a–c, tracing obscured), middle row displaying tracing by bladder scanner’s AI (d–f), and bottom row showing human reviewer tracing (g–i). Images c, f, i show an area of echogenicity that the human reviewer interpreted as within the heart, in contrast to the bladder scanner tracing (image F)