We have analyzed the electrocardiographic data collected during continuous 7-day ambulatory recordings in patients with frequent premature ventricular complexes (PVCs). We analyze the dependence of the frequency and patterns of PVCs on the heart rate and the time of the day. Patients display rhythms of a complex yet consistent structure. In a given patient, the pattern remains robust over different days and particular repetitive patterns appear at specific heart rates, suggesting the appearance of bifurcations in the dynamics. Over the course of 24 h, we find that in some patients, patterns appear to depend only on the heart rate, whereas in others, both the time of the day and the heart rate play a role in controlling the dynamics. Identifying parameter values at which bifurcations occur facilitates the development of dynamical models for arrhythmia. The use of powerful recording and analysis techniques will enable improved analysis of data and better understanding of mechanisms of arrhythmia in individual patients.
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November 2020
Research Article|
November 11 2020
Long ECGs reveal rich and robust dynamical regimes in patients with frequent ectopy
Special Collection:
Dynamical Disease: A Translational Perspective
T. M. Bury
;
T. M. Bury
a)
1
Department of Physiology, McGill University
, 3655 Promenade Sir William Osler, Montreal, Quebec H3G 1Y6, Canada
a)Author to whom correspondence should be addressed: thomas.bury@mcgill.ca
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C. Lerma
;
C. Lerma
2
Departamento de Instrumentación Electromecánica, Instituto Nacional de Cardiología Ignacio Chávez
, Mexico City 14080, Mexico
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G. Bub
;
G. Bub
1
Department of Physiology, McGill University
, 3655 Promenade Sir William Osler, Montreal, Quebec H3G 1Y6, Canada
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Z. Laksman;
Z. Laksman
3
Heart Rhythm Services, Division of Cardiology, University of British Columbia
, Vancouver, British Columbia V6E 1M7, Canada
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M. W. Deyell
;
M. W. Deyell
3
Heart Rhythm Services, Division of Cardiology, University of British Columbia
, Vancouver, British Columbia V6E 1M7, Canada
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L. Glass
L. Glass
1
Department of Physiology, McGill University
, 3655 Promenade Sir William Osler, Montreal, Quebec H3G 1Y6, Canada
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a)Author to whom correspondence should be addressed: thomas.bury@mcgill.ca
Note: This paper is part of the Focus Issue on Dynamical Disease: A Translational Perspective.
Chaos 30, 113127 (2020)
Article history
Received:
August 03 2020
Accepted:
October 26 2020
Citation
T. M. Bury, C. Lerma, G. Bub, Z. Laksman, M. W. Deyell, L. Glass; Long ECGs reveal rich and robust dynamical regimes in patients with frequent ectopy. Chaos 1 November 2020; 30 (11): 113127. https://doi.org/10.1063/5.0023987
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