Let's ask our doctor experts, but isn't it usually the other way around? Your heart stops and then you get brain damage and die from lack of oxygen. I suppose lack of oxygen might also stop the heart, but seems on its face to be backwards.
One here on FR insist that Congress Critter Ron Wright, who had stage 4 lung cancer, died of the China Virus.
Death is defined as when the heart has stopped and cannot start again. It is possible for people to be “brain-dead” or in a coma, etc. while their heart continues to beat and thus technically they are still alive, but when the heart has come to a complete halt, then life has ended.
The weight of the officers impacted Floyd’s ability to breathe to get sufficient oxygen into his blood. This caused lack of oxygen to the respiratory centers of the upper brainstem which controls the breathing process. This became a circular process. With reduced oxygen to the brain stem, respiration slowed causing even less oxygen to the brain stem. This process quickly progressed until all breathing stopped. The oxygen starvation because of loss of lung function impacted a overworked heart racing from the effects of meth. When oxygen starvation completely shut down the breathing process, Floyd’s racing heart was done.