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Chloroquine effects on reentry and breakthroughs (5-sec movies). A, number of rotations/cm2 in the PLA/LAA in control and just before chloroquine-induced AF termination. B, average core width significantly increases in size during chloroquine. C, phase maps show a wavebreak and the initiation of a rotor that cannot complete an entire rotation during chloroquine. D, number of breakthroughs/cm2 in control and during chloroquine.
