Unexcitable zones as a source of spiral waves initiation and cardiac arrhythmias
The initiation of a 2-D spiral wave rotation around a periodic lattice of unexcitable zones (obstacles) is studied numerically by the finite-difference method. The lattice consists of thin asymmetrical filaments formed by unexcitable (diseased) portions of heart tissue. A spiral-like wave rotation o...
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| Zusammenfassung: | The initiation of a 2-D spiral wave rotation around a periodic lattice of unexcitable zones (obstacles) is studied numerically by the finite-difference method. The lattice consists of thin asymmetrical filaments formed by unexcitable (diseased) portions of heart tissue. A spiral-like wave rotation originates from the incident wavefront break which occurred at the obstacles. The conditions are found when a rotation frequency of the broken wavefront fragments is several times greater than the frequency of a normal heart rhythm.< > |
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| DOI: | 10.1109/IEMBS.1994.412162 |