Analysis of R-R Interval Variations in Atrial Fibrillation. Is Heart Rate Variation in Atrial Fibrillation Chaos?:Is Heart Rate Variation in Atrial Fibrillation Chaos?
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To study whether the heart rate variation in atrial fibrillation is chaos or not, R-R intervals in three patients with atrial fibrillation were analyzed by computing fractal dimensions, the largest Lyapunov exponent and power spectrums. The analysis was performed before and after anesthesia with high dose of fentanyl. In all patients, the fractal dimensions did not saturate, and the largest Lyapunov exponent approached zero. Spectral analysis revealed that variation of R-R intervals in the patients is similar to white noise. These findings were unaffected by fentanyl anesthesia. These results suggest that heart rate variations in atrial fibrillation are not chaotic and that high-dose fentanyl anesthesia dose not influence the noise-like property of the variations.
- 日本臨床麻酔学会の論文
日本臨床麻酔学会 | 論文
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