Patent ID: 7826881

Claim:
An endocardial chamber mapping system comprising: a) a catheter assembly having; i) an array of signal acquisition electrodes expandable from a substantially cylindrical shape to an expanded shape, and ii) a catheter plug with multiple connections, each of the connections being electrically coupled to one of said array of acquisition electrodes; b) an interface apparatus having; i) an interface plug connected to the catheter plug to establish electrical connection to each of the electrodes, ii) a voltage acquisition apparatus in communication with the interface plug and coupled to said array of acquisition electrodes, said voltage acquisition apparatus having an analog to digital converter for digitizing voltages on said array of acquisition electrodes, and iii) a signal generator in communication with one or more of said array of voltage acquisition electrodes for generating low current pulses; and c) a computer having; i) electrical communication with the signal generator of the interface apparatus to control its function, ii) electrical communication with the voltage acquisition apparatus to receive the voltages acquired by the signal acquisition electrodes, iii) processing unit to compute a three-dimensional volumetric electric field distribution based on the voltages received from the signal acquisition electrodes, and iv) a display showing the computed field distribution.