Fig. 20.5 Baule-McFee lead system.

(A) The general construction of the measurement system.

(B) Measurement of the
x-component of the magnetic heart vector.

(C) Measurement of the
y-component of the magnetic heart vector.

(D) Measurement of the
z-component of the magnetic heart vector.

Baule-McFee lead system makes a bipolar measurement of the equivalent magnetic dipole of the heart.