Recurrence Plots: a New Tool for Quantification of Cardiac Autonomic Nervous System Recovery after Transplant

To evaluate a possible evolutionary post-heart transplant return of autonomic function using quantitative and qualitative information from recurrence plots. Using electrocardiography, 102 RR tachograms of 45 patients (64.4% male) who underwent heart transplantation and that were available in the dat...

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Bibliographic Details
Published in:Revista brasileira de cirurgia cardiovascular 2017-01, Vol.32 (4), p.245-252
Main Authors: Takakura, Isabela Thomaz, Hoshi, Rosangela Akemi, Santos, Márcio Antonio, Pivatelli, Flávio Correa, Nóbrega, João Honorato, Guedes, Débora Linhares, Nogueira, Victor Freire, Frota, Tuane Queiroz, Castelo, Gabriel Castro, Godoy, Moacir Fernandes de
Format: Article
Language:English
Subjects:
Autonomic Nervous System
Autonomic Nervous System - physiology
CARDIAC & CARDIOVASCULAR SYSTEMS
Cardiology
Cardiovascular disease
Determinism
Dynamical systems
Electrocardiography - methods
Entropy
Female
Heart - innervation
Heart failure
Heart rate
Heart Rate - physiology
Heart surgery
Heart Transplantation - rehabilitation
Homeostasis
Humans
Male
Models, Theoretical
Monitoring, Physiologic - methods
Nervous system
Original
Patients
Physiology
Prime numbers
Recovery (Medical)
Recovery of Function - physiology
Software
Studies
SURGERY
Time series
Transplantation
Transplants & implants
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Summary:To evaluate a possible evolutionary post-heart transplant return of autonomic function using quantitative and qualitative information from recurrence plots. Using electrocardiography, 102 RR tachograms of 45 patients (64.4% male) who underwent heart transplantation and that were available in the database were analyzed at different follow-up periods. The RR tachograms were collected from patients in the supine position for about 20 minutes. A time series with 1000 RR intervals was analyzed, a recurrence plot was created, and the following quantitative variables were evaluated: percentage of determinism, percentage of recurrence, average diagonal length, Shannon entropy, and sample entropy, as well as the visual qualitative aspect. Quantitative and qualitative signs of heart rate variability recovery were observed after transplantation. There is evidence that autonomic innervation of the heart begins to happen gradually after transplantation. Quantitative and qualitative analyses of recurrence can be useful tools for monitoring cardiac transplant patients and detecting the gradual return of heart rate variability.
ISSN:0102-7638
1678-9741
1678-9741
DOI:10.21470/1678-9741-2016-0035