Patent ID: 7764998

Claim:
An implantable cardiac stimulation device for delivering electrical stimulation to the heart of a patient, the device comprising: a plurality of leads adapted to be implanted adjacent the heart of the patient so as to be able to provide electrical stimulation to the heart of the patient; a high voltage circuit that generates a high voltage output waveform adapted to be applied to the heart of the patient; a current sensor configured to monitor the amount of current flowing through the leads and the high voltage circuit, wherein the current sensor is adapted to determine if the amount of current exceeds a predetermined threshold; and a controller adapted to control delivery of the high voltage waveform so as to induce the delivery of electrical stimulation to the heart of the patient via a first configuration of the leads, wherein the controller is adapted to terminate the delivery of the electrical stimulation via the first configuration of the leads and to reconfigure the leads such that electrical stimulation is delivered via a second configuration of the leads when the amount of current flowing through the first lead configuration exceeds a predetermined threshold which is indicative of potential damage to one or more components along the path of the current.