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The Pinwheel Experiment Re-revisited

✍ Scribed by ALEXANDRE SAMBELASHVILI; IGOR R EFIMOV

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 383 KB
Volume: 214
Category: Article
ISSN: 0022-5193
DOI: 10.1006/jtbi.2001.2456

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✦ Synopsis

Virtual electrode induced phase singularity hypothesis explains the origin of cardiac arrhythmias caused by arti"cial electrical induction of rotors, i.e. vortex-like self-sustained sources of activity. This mechanism is thought to underlie both stimulus-induced arrhythmias and shock de"brillation therapy. In this paper, we extend this hypothesis to three dimensions using the bidomain model of cardiac tissue. We predict that virtual electrode polarization can produce three topologically distinct types of rotors anchored to: (1) transmural I-shaped scroll wave "laments; (2) near-surface U-shaped scroll wave "laments; and (3) intramural O-shaped scroll wave "laments.

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