The magnetic cardiac pacemaker utilizes bisphasic pulses of mixed frequencies and waveforms that are applied to a field coil to generate magnetic pulses of relatively low intensity (less than 200 Gauss) without the use of leads. The device can be worn externally on the chest near the heart to enable...http://www.google.ca/patents/US5170784?utm_source=gb-gplus-sharePatent US5170784 - Leadless magnetic cardiac pacemaker
