Comparison of different methods and catheter designs to estimate the rotor tip position - A simulation study

There is still a need for research to understand the coherences of the origin of arrhythmias such like rotors and possible ablation strategies. The aim of this work was the analysis of typical signal characteristics near a rotor center. Rotors were simulated on 2D patch geometry (100 mm × 100 mm) with spatial resolution of 0.1mm. Based on extracellular potentials, different features were evaluated: Local activation time, peak to peak amplitude, steepest negative slope and approximate entropy were compared regarding their ability to indicate the rotor tip location. Furthermore, typical signal patterns of different mapping catheters centered at the rotor tip position were analyzed. The determined maximum distances between the focal point of phase singularities and determined centers by the peak to peak amplitudes were maximal 1.7 mm.