Can a baby survive cardiac arrest or is it too much?

Babies can survive cardiac arrest, but there are degrees of "survival" that will vary greatly depending on how long the child was in arrest before resuscitation efforts were started, and how quickly the heart started to beat on it's own again. It also depends on what the condition of the child was prior to the cardiac arrest. If the child was mostly healthy, and suffered the arrest during a near drowning, for example, then as long as the child was quickly resuscitated, they have a chance for a full recovery. If there are underlying conditions, or disease pathologies that make the child prone to arrest and the complications thereof, the outcome may be more dire.