PMC

The rotor axis orbit at high rotor speed. (a) transducer excitation frequency and rotor speed; (b) transducer excitation frequency and rotor speed.

The trajectory of a mother rotor tip remains within a circle of a diameter that is half the wavelength. Action potentials at three different locations (the center and periphery of the mother rotor tip trajectory and the periphery of the mother rotor) are also shown.

Detailed results of frequency domain and entropy analysis. A, Histogram of dominant frequency at all rotor and nonrotor sites shows similar frequency distribution. B, Histogram of Shannon entropy (ShEn) at all rotor and nonrotor sites shows similar frequency distribution.

(a) e is in [0.15, 0.56]. (b) e is in [0.02, 0.12]. (c) Statistics result of SRF of rotor in [8, 10]ns (e ≥ 0.15) or in [80, 100] ns with respect to e ≤ 0.12.