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. 2017 May 16;10(5):e004899. doi: 10.1161/CIRCEP.116.004899

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© 2017 The Authors.

Circulation: Arrhythmia and Electrophysiology is published on behalf of the American Heart Association, Inc., by Wolters Kluwer Health, Inc. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial-NoDerivs License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited, the use is noncommercial, and no modifications or adaptations are made.

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Figure 3. — Resolution requirements for spiral wave detection and focal source detection depend on spatial wavelength. A, Technique to calculate wavelength of a spiral or focal wavefront. Isopotential lines at −60 mV with positive (green) and negative (blue) gradient. Intersections of the ray (white line) with the isopotential lines of positive gradient are shown (purple dots). B, Distributions of PSs over time for rotor simulations at different resolution and wavelengths. Phase singularities corresponding to a rotor core location are shown in green. Number of false detections (chirality shown in blue and red) increased as wavelength decreased and as grid spacing increased. C, Minimum N necessary to identify a rotor for each criterion. D, Minimum N necessary to identify a focal source for each criterion.