Abnormalities in Fractal Heart Rate Dynamics in Chagas Disease

Abnormalities in Fractal Heart Rate Dynamics in Chagas Disease

Background and Methods: In order to study fractal HR dynamics in Chagas disease, we performed detrended fluctuation analysis (DFA)—along with analysis of power‐law β slope (β index) and standard deviation of N–N intervals (SDNN)—in edited and unedited (with ventricular premature beats — VPBs, only i...

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Veröffentlicht in:Annals of noninvasive electrocardiology 2006-04, Vol.11 (2), p.145-153
Hauptverfasser: De Sousa, Marcos Roberto, Huikuri, Heikki V., Lombardi, Federico, Perez, Amanda A., Gomes, Murilo E.D., Lins Barros, Marcio Vinícius, Val Barros, Vladimir Costa, Costa Rocha, Manoel Otávio, Pinho Ribeiro, Antonio Luiz
Format: Artikel
Sprache:eng
Schlagworte:
Adult
Aged
Case-Control Studies
Chagas disease
Chagas Disease - physiopathology
Chi-Square Distribution
Electrocardiography, Ambulatory
fractal correlation
Fractals
heart rate
Heart Rate - physiology
Humans
Middle Aged
Nonlinear Dynamics
Original
Statistics, Nonparametric
Ventricular Dysfunction, Left - physiopathology
ventricular premature beats
Ventricular Premature Complexes - physiopathology
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Zusammenfassung:Background and Methods: In order to study fractal HR dynamics in Chagas disease, we performed detrended fluctuation analysis (DFA)—along with analysis of power‐law β slope (β index) and standard deviation of N–N intervals (SDNN)—in edited and unedited (with ventricular premature beats — VPBs, only in DFA analysis) series of R‐R intervals from Holter monitoring of healthy controls (Group 0, n = 27) and Chagas disease patients with left ventricular (LV) ejection fraction >50% (Group 1, n = 137) and with LV ejection fraction
ISSN:1082-720X
1542-474X
DOI:10.1111/j.1542-474X.2006.00096.x