Eh. That's debatable.
The issue is cardiology is not taught in your typical EMTB class. Then they attempt to take ACLS and think they are going to be taught cardiology in that short time frame and typically one of three things happen.
1)- They are completely lost and fail/drop out
2)- they memorize enough just to pass the test and still have zero idea what to do in the field and therefore just obtain a card saying they have ACLS, but do not obtain the knowledge. This does not help the medic. It's really annoying.
3)-They teach themselves the ACLS book prior to beginning the class, have a basic concept of ACLS, but are still lost in the field because cardiology is not something that can typically be grasped in mere days, and spend more time asking the medic questions to better understand rather then actually helping. Or Atleast that's my experience.
An EMT that just knows how to place 12 lead electrodes and start an IV is good with me.