No, high voltage DC can do the same thing. All it takes is a large enough voltage along with the resistance of a human body to produce 10 to 100 uA of current across the heart. Penetrating the skin greatly reduces the resistance. Anything greater than about 40V DC can be dangerous!
TV high voltage power supplies produce a DC voltage. Actually the flyback transformer produces high voltage AC much like a switching power supply, but it is rectified to DC.
In order to have the electrons flow with the radiator GROUNDED, you will have to produce
a negative voltage (electrons). Otherwise you will produce current flow (and voltage) in the ground path and trip ground fault interrupters if you have them in your AC outlets, and confuse the crap out of the circuits (power supply, motherboards, etc.) that expect ground to be ground (~ 0V).
High voltage (actually any voltage) seeks the path of least resistance, not shortest distance.
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