I just engraved a few extra circuits into the machine where they won't show; built 'em on the sensor-connections, then programmed 'em hard.

Blackie was probably patched in and listening via that extra circuit.

In addition, the home console versions of the game include five extra unlockable circuits.

With Gale's help, Morse introduced extra circuits or relays at frequent intervals and was soon able to send a message through ten miles (16 km) of wire.

Groves told the media "It's an extra circuit in the heart, and it speeds up your heartbeat, it's nothing too critical, but you have to take care of it."

But Soviet officials have said that they have the ground equipment to handle only a total of 24 extra circuits.

Using radio frequencies, he performs electrocardiograms from the inside, pinpointing the origin of extra circuits in the heart with electrode catheters.

Lieutenant Poffenberger had an extra circuit on his wireless set, one that hooked him to division headquarters.

Ablation pinpoints the origin of the extra circuits and eliminates, or ablates, the cells to restore the normal electrical path.

Energy is applied to eliminate the cells that conduct extra electrical circuits.