#$%^&*AU2016200715B220180712.pdf#####SYSTEM AND METHOD TO DEFINE A ROTATIONAL SOURCE ASSOCIATED WITH A BIOLOGICAL RHYTHM DISORDER ABSTRACT An example system and method of determining a likely core of a rotational source associated with a heart rhythm disorder are disclosed. A plurality of relative diffusion shapes associated with wave fronts are calculated, at a plurality of time points associated with the rotational source, the wave fronts associated with heart signals. A plurality of intersecting points of a smallest relative diffusion shape and other relative diffusion shapes are determined. A bounded polygon of the intersecting points is defined as the likely core. 7931177_1 -31-WO 2014/150042 PCT/US201 41021973 Page I of 7 114 A B C D E F G H .- 0 FIG. 1 104 200 I (0,0) (28,0)' XNY TX >；eectrode 2 <；-(0,4) 204 206 coordinate. ae 214 3 ~{0.8) (5~~c6,8p ~ine=((x4-1)14) ' A' electrod~e =((y+1)/4) + 1 S208 210) 212 '1202 spine! X-Y R e~etrode 6 cordinate rference 7 (02) (,8 1,8 2,8x =4(spline- W) (0e , 82, 1 8 2,8 y = 4(electrode - 1) A B D E F G H'A- -- 102 FIG. 2
