Abstract: An external transmitter apparatus for a transcutaneous energy transfer (TET) system for supplying power for use in energising an implantable medical device is disclosed, the apparatus comprising an external transmitter apparatus comprising a plurality of transmitter coils for delivering power transcutaneously to one of a plurality of receiver coils of an implantable receiver apparatus of the TET system when located in proximity thereto. The external transmitter apparatus is provided with power by a pulsed power supply. The coils of the external transmitter apparatus and the implantable receiver apparatus may be printed on flexible substrates. Also disclosed are methods of operating such a system, an external transmitter apparatus for use in such a system, an external transmitter apparatus and an implantable receiver apparatus including flexible coils.

Abstract: An external transmitter apparatus for a transcutaneous energy transfer (TET) system for supplying power for use in energising an implantable medical device is disclosed, the apparatus comprising an external transmitter apparatus comprising a plurality of transmitter coils for delivering power transcutaneously to one of a plurality of receiver coils of an implantable receiver apparatus of the TET system when located in proximity thereto. The external transmitter apparatus is provided with power by a pulsed power supply. The coils of the external transmitter apparatus and the implantable receiver apparatus may be printed on flexible substrates. Also disclosed are methods of operating such a system, an external transmitter apparatus for use in such a system, an external transmitter apparatus and an implantable receiver apparatus including flexible coils.

Abstract: A method and apparatus of analysing Ventricular Late Potential (VLP) including determining a parameter related to the complexity of the VLP as a parameter for clinical evaluation. The method may include computing the fractal dimension of the attractor for the VLP as a parameter for clinical evaluation. The method may include performing a spectral analysis producing an assessment based on a discrete Hartley transform (DHT) vector spectrum by summing amplitude components between -f.sub.1 to -f.sub.2 and +f.sub.2 to +f.sub.1, where f.sub.1 is a number larger than f.sub.2.