Multi-array recording provides useful information on local electrical depolarization and repolarization . Specifically, activation mapping assesses local conduction velocity, as well as repolarization heterogeneity, both considered basic arrhythmogenic mechanisms.
Unipolar ventricular electrograms are recorded from 32 electrodes, in reference to Wilson’s central terminal. The electrodes are selected from a commercially available multi-electrode array with a 1.25X1.50mm inter-electrode distance. Recordings from the multi-electrode array are made at a sampling frequency of 5kHz, with a use of a custom built software in collaboration with Vassili LaRocca. Electrical noise is eliminated by application of a 50/60Hz band-pass filter, and motion artifacts by inverse Chebyshev, elliptic and wavelet filters.
Multi-array recording and analysis from the border zone between infarcted and healthy myocardium in rats in vivo. Such analysis provides invaluable in-depth electrophysiologic data.
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