Google is easy, use it. Speculation does not help.
“ Seizure-like activity is a major sign/symptom of the onset of “sudden” cardiac arrest of presumed cardiac etiology, particularly in patients with shockable initial rhythms.”
Cleveland Clinic - the #1 cardio-vascular clinic in the world - is better.
CC website states that victims of cardiac arrest lose consciousness almost immediately.
Unconscious persons with no pulse and no blood pressure do not have to be restrained from thrashing about.
And, I have never heard of treating post-cardiac arrest victims with deep sleep sedation and intubation.
And, the fact that the family and the NFL have released ZERO detailed information for 36 hours simply pours gasoline on the speculative fire.