Pulseless electrical activity
WikEM overview of PEA: https://www.wikem.org/wiki/Adult_pulseless_arrest
A simple, structured way to evaluate and treat PEA: http://www.emdocs.net/r-e-b-e-l-em-beyond-acls-a-new-pulseless-electrical-activity-algorithm/
A review "vodcast" of PEA: http://emdidactic.blogspot.com/2016/05/pulseless-electrical-activity.html