Browsing by Author "Goldberger, Ary"
Now showing items 1-8 of 8
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Decreased Neuroautonomic Complexity in Men during an Acute Major Depressive Episode: Analysis of Heart Rate Dynamics
Leistedt, S J-J; Linkowski, P; Lanquart, J-P; Mietus, J E; Davis, Roger B.; Goldberger, Ary Louis; Costa, Madalena Damasio (Nature Publishing Group, 2011)Major depression affects multiple physiologic systems. Therefore, analysis of signals that reflect integrated function may be useful in probing dynamical changes in this syndrome. Increasing evidence supports the conceptual ... -
Dynamical density delay maps: simple, new method for visualising the behaviour of complex systems
Burykin, Anton; Costa, Madalena D; Citi, Luca; Goldberger, Ary L (BioMed Central, 2014)Background: Physiologic signals, such as cardiac interbeat intervals, exhibit complex fluctuations. However, capturing important dynamical properties, including nonstationarities may not be feasible from conventional time ... -
Gait Unsteadiness and Fall Risk in Two Affective Disorders: A Preliminary Study
Hausdorff, Jeffrey M.; Peng, Chung-Kang; Goldberger, Ary Louis; Stoll, Andrew L (BioMed Central, 2004)Background: In older adults, depression has been associated with increased fall risk, but the reasons for this link are not fully clear. Given parallels between major depression and Parkinson's disease, we hypothesized ... -
Generalized Multiscale Entropy Analysis: Application to Quantifying the Complex Volatility of Human Heartbeat Time Series
Costa, Madalena D.; Goldberger, Ary L. (2016)We introduce a generalization of multiscale entropy (MSE) analysis. The method is termed MSEn, where the subscript denotes the moment used to coarse-grain a time series. MSEμ, described previously, uses the mean value ... -
Heart Rate Dynamics after Combined Strength and Endurance Training in Middle-Aged Women: Heterogeneity of Responses
Karavirta, Laura; Costa, Madalena D.; Goldberger, Ary L.; Tulppo, Mikko P.; Laaksonen, David E.; Nyman, Kai; Keskitalo, Marko; Häkkinen, Arja; Häkkinen, Keijo (Public Library of Science, 2013)The loss of complexity in physiological systems may be a dynamical biomarker of aging and disease. In this study the effects of combined strength and endurance training compared with those of endurance training or strength ... -
Multimodal Pressure-Flow Method to Assess Dynamics of Cerebral Autoregulation in Stroke and Hypertension
Novak, Vera; Yang, Albert CC; Lepicovsky, Lukas; Goldberger, Ary Louis; Lipsitz, Lewis Arnold; Peng, Chung-Kang (BioMed Central, 2004)Background: This study evaluated the effects of stroke on regulation of cerebral blood flow in response to fluctuations in systemic blood pressure (BP). The autoregulatory dynamics are difficult to assess because of the ... -
Multiscale Poincaré plots for visualizing the structure of heartbeat time series
Henriques, Teresa S.; Mariani, Sara; Burykin, Anton; Rodrigues, Filipa; Silva, Tiago F.; Goldberger, Ary L. (BioMed Central, 2016)Background: Poincaré delay maps are widely used in the analysis of cardiac interbeat interval (RR) dynamics. To facilitate visualization of the structure of these time series, we introduce multiscale Poincaré (MSP) plots. ... -
Sinus Versus Nonsinus Tachycardia in the Emergency Department: Importance of Age and Heart Rate
Pinto, Duane S; Ho, Kalon Kwun Leung; Zimetbaum, Peter J.; Pedan, Alexander; Goldberger, Ary Louis (BioMed Central, 2003)Background: The emergency department diagnosis of sinus versus nonsinus tachycardia is an important clinical challenge. The objective of this study was to identify subjects with a high prevalence of nonsinus tachycardia. ...