Wavefront orientation effects on bipolar epicardial electrograms

It is determined whether information about wavefront orientation could be extracted from electrograms recorded from bipolar electrodes with poles 2 mm apart. Wavefront orientation was measured by using the line connecting the poles of each bipolar electrode as one side of the angle and the tangent to the approaching wavefront at the center of the electrode pair as the other side. Electrograms recorded from sites with small angle wavefront orientation (0 degrees >