How can I find out the voltage going through a person's heart if they
are holding on to a current source(50V) and the other end is on the
ground, and has current resistance equal to the person standing
barefoot at the pool or boat dock.

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Clarification of Question by ladyliberty-ga on 01 Nov 2004 14:54 PST

The heart is represented by Rh, the floor has ressitance to current
flow equal to Rf, the upper body resistance Ru and lower body
resistance Rl vary. Ru=20 ohms, Rh=100 ohms, Rl= 30 ohms and Rf = 200
ohms. the current source is 50 V.
Once I figure that out I need to find out the voltage  of the Thevenin
equivalent circuit for the current flowing through the heart at the
output terminals a-b.