Going to call a little bit of BS on this. Cardiac muscle ( heart muscle) posses a quality called automaticity . The heart muscle allows a certain amount of calcium to leak into the muscle triggering a heart beat. The ventricle will beat at about 40/ min, the AV junction around 60/ min and the pacemaker around 70/ min.when some ne dies they often enter into an what is called an agonal rhythm. It is the ventrical escape beats. Slowly decreasing as profusion slows and the heart can beat no more. It may be possible to control but probably not very easily done.
There is a strong dividing line between the animal part of a person and his soul.