title: Removal of a pinned spiral by generating target waves with a localized stimulus.
abstract: Pinning of spiral waves by defects in cardiac muscle may cause permanent tachycardia. We numerically study the removal of a pinned spiral by a localized stimulus at the boundary of a two-dimensional excitable medium. It is shown that target waves may be generated by an external local force, and then the target waves will interact with the pinned spiral. When the external force is appropriately chosen, the generated target waves may suppress the pinned spiral, and the system is finally dominated by the target waves.
authors.affiliation: Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, China.
authors.forename: Ya-Qing
authors.initials: YQ
authors.lastname: Fu
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Zhoujian
authors.initials: Z
authors.lastname: Cao
authors.forename: Bo
authors.initials: B
authors.lastname: Zheng
authors.forename: Gang
authors.initials: G
authors.lastname: Hu