ACLS - Non-Shockable Rhythms
These are (1) PEA arrest and (2) asystole.
PEA Arrest
Important to differentiate from ACLS - Pseudo-PEA as this has different management and prognostic implications (i.e. better, higher chance of detectable ROSC).
Asystolic Arrest
I.e. "flatline" - no cardiac activity. Very poor prognosis.