Mapping of complex fractionated atrial electrogram
A complex fragmentation electrogram, a technique of the heart, used in the field of diagnosis and treatment of cardiac arrhythmias
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Embodiment 1
[0081] In this embodiment, system 10 (FIG. 1) is utilized to apply the first criteria described in the section entitled "CFAE Identification." This is done by recording for a longer period of time, eg 50 seconds, and detecting two CFAE complexes within a 10 second interval at one point. Alternatively, it is also possible to detect long-term perturbations in the baseline beyond 10 seconds by recording the mean baseline and scanning the data for long-term deviations.
Embodiment 2
[0083]Reference is now made to FIG. 12, which is an illustration of a system 154 constructed and operative in accordance with an alternative embodiment of the present invention. System 106 is similar to system 10 (FIG. 1). However processor 22 now contains circuitry for impedance detection, as described in U.S. Patent Application 11 / 030,934, filed January 7, 2005, assigned to the assignee of this patent application, and its publication is hereby incorporated by reference. However, subject 21 is now wearing torso underwear 156 having a plurality of electrodes 158, typically between about 125 and 250 electrodes, arranged within torso underwear 156 to provide the front, Potential measurement of posterior and lateral aspects. Electrodes 158 are connected to processor 22 via leads 160 and cables 162 . Processor 22 is modified for receiving and processing data from torso underwear 156 .
[0084] Based on impedance measurements between a small number of endocardial points and ele...
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