Phys. Rev. Lett. 82, 5164–5167 (1999)How to Tell a Target from a Spiral: The Two Probe ProblemReceived 18 November 1998; published in the issue dated 21 June 1999 Targets and spirals are ubiquitous wave patterns found in excitable media. Here, we show how to distinguish a target from a spiral using only two probes to measure activity and deliver stimuli. The different spatiotemporal symmetry properties of targets and spirals are revealed applying stimuli interchangeably at both probes. Our technique has diagnostic implications for cardiology since targets and spirals are associated with different mechanisms of cardiac arrhythmia. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.5164
DOI:
10.1103/PhysRevLett.82.5164
PACS:
87.17.-d, 47.35.+i, 82.20.Wt, 82.40.Ck
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