Taken from:
http://www.jonathancoulton.com/wiki/Artificial_Heart_(song)/Tabs

Author's note:
"The chords in parenthesis are implied by the melody and from the final verse where they are 
actually played on guitar.  I put them them just in case you wanted to have some accompaniment 
to go along with the vocals."

C     x32010
F   x33211
E     022100
Am    x02210
D     xx0232
Fdim  xx3434
Dm    x57765
D7/F# 200212
Ab    466544
C (2 fr.)  8(10)(10)988

(C)  (F)     (C)     F/C)        (C)      (G)     (C)
They gave me a test to make me the best that I could be
(C)  (F)     (C)       (F)     (C)       (G)        (C)
They knew all along that there was something wrong with me
F E           Am       D      G   Fdim
We picked out a spot and made a hole
F                          C
Wire and glass and stainless steel
F                          E
Now I can imagine how I'd feel

F
Got a new heart
F
Got a new heart
Dm
Got a new heart
Dm                   Am    G
Got a new artificial heart
F
It's not a real heart
F
It's not a real heart
Dm
It's not a real heart
Dm                      Am  G  D7/F# G
It is a real artificial heart

(C)     (F)        (C)     (F)      (C)     (G)      (C)
There's blood on the bed but here in my head I'm feeling fine
(C)  (F)   (C)        (F)   (C)     (G)     (C)
It's easy to sleep when I'm not buzzing all the time
F E        Am    D   G      Fdim   
So funny the way I was before
F                   C
I was blind but now I see
F                         E
Once I was him but now he's me

F
Got a new heart
F
Got a new heart
Dm
Got a new heart
Dm                   Am    
Got a new artificial heart

F
It's not a real heart
F
It's not a real heart
Dm
It's not a real heart
Dm                      Am   
It is a real artificial heart
Bridge
|G  |D7/F# |F E|F  |Ab  |C (2 fr.) |

C      F   C       F/C       C         G          C
You're happy again I nod and pretend to think it through
  F           C        F    C       G        C
I don't need to think at all if I don't care for you
F  E       Am    D      G  Fdim
It's not an emergency for me
F                             C
I look at the walls and they go clear
F                      E
I cover my eyes and disappear
F
Got a new heart
F
Got a new heart
Dm
Got a new heart
Dm                   Am    G
Got a new artificial heart
F
It's not a real heart
F
It's not a real heart
Dm
It's not a real heart
Dm                      Am   
It is a real artificial heart