A cardiac assist device containing a device for connecting the cardiac assist
device
to a heart, for furnishing electrical impulses from the cardiac assist device to
the heart, for ceasing the furnishing of electrical impulses to the heart, for
receiving pulsed radio frequency fields, for transmitting and receiving optical
signals, and for protecting the heart and the cardiac assist device from currents
induced by the pulsed radio frequency fields. The cardiac assist device contains
a control circuit comprised of a parallel resonant frequency circuit.
