Floyd appears to be whacked up on drugs during the arrest , perhaps two different drugs fighting against one another.
The toxicology report showed that as well.
I dont understand why that wasn't put into consideration to him going into cardiac arrest. ???
The elevated heart rate during the struggling arrest and then the sudden suppression to his breathing capability by Derek Chauvin's knee against his neck, combined with a fair amount of drugs in his system most likely caused the cardiac arrest to occur.