Details

Autor(en) / Beteiligte

• Small, Michael
• Yu, Dejin
• Harrison, Robert G.
• Robertson, Colin
• Clegg, Gareth
• Holzer, Michael
• Sterz, Fritz

Titel

Deterministic nonlinearity in ventricular fibrillation

Ist Teil von

• Chaos (Woodbury, N.Y.), 2000-03, Vol.10 (1), p.268-277

Ort / Verlag

United States

Erscheinungsjahr

2000

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We provide numerical evidence that the electrocardiogram data collected from pigs during induced ventricular fibrillation cannot be described by a monotonic nonlinear transformation of linearly filtered noise. To establish this we use surrogate techniques and apply two test statistics: (1) the Takens’ maximum likelihood estimator of the Grassberger–Procaccia correlation dimension and (2) an improved correlation dimension estimation routine. The improved dimension estimates provide evidence that the correlation dimension of the underlying dynamics during the episode of VF in the first 30 s is slightly less than 6. This result is consistent and reproducible among subjects.