Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test
This paper presents an application of Approximate Entropy (ApEn) and Sample Entropy (SampEn) in the analysis of heart rhythm, blood pressure and stroke volume for the diagnosis of vasovagal syndrome. The analyzed biosignals were recorded during positive passive tilt tests—HUTT(+). Signal changes and...
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| Format: | Article |
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MDPI AG
2017-05-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/19/5/236 |
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| author | Katarzyna Buszko Agnieszka Piątkowska Edward Koźluk Grzegorz Opolski |
| author_facet | Katarzyna Buszko Agnieszka Piątkowska Edward Koźluk Grzegorz Opolski |
| author_sort | Katarzyna Buszko |
| collection | DOAJ |
| description | This paper presents an application of Approximate Entropy (ApEn) and Sample Entropy (SampEn) in the analysis of heart rhythm, blood pressure and stroke volume for the diagnosis of vasovagal syndrome. The analyzed biosignals were recorded during positive passive tilt tests—HUTT(+). Signal changes and their entropy were compared in three main phases of the test: supine position, tilt, and pre-syncope, with special focus on the latter, which was analyzed in a sliding window of each signal. In some cases, ApEn and SampEn were equally useful for the assessment of signal complexity (p < 0.05 in corresponding calculations). The complexity of the signals was found to decrease in the pre-syncope phase (SampEn (RRI): 1.20–0.34, SampEn (sBP): 1.29–0.57, SampEn (dBP): 1.19–0.48, SampEn (SV): 1.62–0.91). The pattern of the SampEn (SV) decrease differs from the pattern of the SampEn (sBP), SampEn (dBP) and SampEn (RRI) decrease. For all signals, the lowest entropy values in the pre-syncope phase were observed at the moment when loss of consciousness occurred. |
| first_indexed | 2024-04-13T06:17:38Z |
| format | Article |
| id | doaj.art-e5f7907fefad4fc1a32cf1b2debd630e |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-13T06:17:38Z |
| publishDate | 2017-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-e5f7907fefad4fc1a32cf1b2debd630e2022-12-22T02:58:46ZengMDPI AGEntropy1099-43002017-05-0119523610.3390/e19050236e19050236Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt TestKatarzyna Buszko0Agnieszka Piątkowska1Edward Koźluk2Grzegorz Opolski3Department of Theoretical Foundations of Bio-Medical Science and Medical Informatics, Collegium Medicum, Nicolaus Copernicus University, 85-067 Bydgoszcz, Poland1st Chair Department of Cardiology, Medical University of Warsaw, Warsaw 02-091, Poland1st Department of Cardiology, Medical University of Warsaw, Warsaw 02-091, Poland1st Department of Cardiology, Medical University of Warsaw, Warsaw 02-091, PolandThis paper presents an application of Approximate Entropy (ApEn) and Sample Entropy (SampEn) in the analysis of heart rhythm, blood pressure and stroke volume for the diagnosis of vasovagal syndrome. The analyzed biosignals were recorded during positive passive tilt tests—HUTT(+). Signal changes and their entropy were compared in three main phases of the test: supine position, tilt, and pre-syncope, with special focus on the latter, which was analyzed in a sliding window of each signal. In some cases, ApEn and SampEn were equally useful for the assessment of signal complexity (p < 0.05 in corresponding calculations). The complexity of the signals was found to decrease in the pre-syncope phase (SampEn (RRI): 1.20–0.34, SampEn (sBP): 1.29–0.57, SampEn (dBP): 1.19–0.48, SampEn (SV): 1.62–0.91). The pattern of the SampEn (SV) decrease differs from the pattern of the SampEn (sBP), SampEn (dBP) and SampEn (RRI) decrease. For all signals, the lowest entropy values in the pre-syncope phase were observed at the moment when loss of consciousness occurred.http://www.mdpi.com/1099-4300/19/5/236approximate entropysample entropyvasovagal syndrome |
| spellingShingle | Katarzyna Buszko Agnieszka Piątkowska Edward Koźluk Grzegorz Opolski Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test Entropy approximate entropy sample entropy vasovagal syndrome |
| title | Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test |
| title_full | Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test |
| title_fullStr | Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test |
| title_full_unstemmed | Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test |
| title_short | Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test |
| title_sort | entropy in investigation of vasovagal syndrome in passive head up tilt test |
| topic | approximate entropy sample entropy vasovagal syndrome |
| url | http://www.mdpi.com/1099-4300/19/5/236 |
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