For late Mistress, who was a medical doctor, the use of electricity was a definite "No-no". She used to say the risk of contracting heart-rhythm disorders is way too high, even with low voltage and the electrodes attached to parts of the body far away from the heart. If you still want to play with it, we definitely recommend to have an electrocardiograph done before starting to play with electricity and have this cardiograph repeated on a regular basis.