Cammarota, Camillo; Rogora, Enrico - In: Physica A: Statistical Mechanics and its Applications 353 (2005) C, pp. 323-335
Heartbeat intervals during atrial fibrillation are commonly believed to form a series of almost independent variables. The series extracted from 24h Holter recordings show a nonstationary behavior. Because of nonstationarity it is difficult to give a quantitative measure of independence. In this...