Time‐ and frequency‐domain analysis of repolarization phase during recovery from exercise in healthy subjects.
Background/aim: Recently, data from temporal dispersion of myocardial repolarization analysis have gained a capital role in the sudden cardiac death risk stratification. Aim of this study was to evaluate the influence of heart rate, autonomic nervous system, and controlled breathing on different myo...
| Publicado en: | Pacing & Clinical Electrophysiology Vol. 43; no. 10; pp. 1096 - 1104 |
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| Autores principales: | , , , , , , , , , , |
| Formato: | equations & formulas research tables/charts tracings Journal Article |
| Publicado: |
Wiley-Blackwell
Oct2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=146497507&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 146497507 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01478389 4F8 jtl: Pacing & Clinical Electrophysiology issn: 01478389 maglogo: Y pubinfo: dt: Oct2020 vid: 43 iid: 10 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 146497507 145911593 146497507 146497507 10.1111/pace.14038 146497507 ppf: 1096 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: C – @attributes: type: P tig: atl: Time‐ and frequency‐domain analysis of repolarization phase during recovery from exercise in healthy subjects. aug: au: Piccirillo, Gianfranco Moscucci, Federica Iorio, Claudia Di Fabietti, Marcella Mastropietri, Fabiola Crapanzano, Davide Bertani, Gaetano Sabatino, Teresa Zaccagnini, Giulia Lospinuso, Ilaria Magrì, Damiano affil: Dipartimento di Scienze Cliniche, Internistiche, Anestesiologiche e Cardiovascolari, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy sug: subj: Recovery, Exercise Electrocardiography Heart Conduction System Physiology Myocardium Physiology Human Volunteer Workers Exercise Physiology Heart Rate Evaluation Sympathetic Nervous System Physiology Descriptive Statistics ab: Background/aim: Recently, data from temporal dispersion of myocardial repolarization analysis have gained a capital role in the sudden cardiac death risk stratification. Aim of this study was to evaluate the influence of heart rate, autonomic nervous system, and controlled breathing on different myocardial repolarization markers in healthy subjects. Method: Myocardial repolarization dispersion markers from short‐period (5 minutes) electrocardiogram (ECG) analysis (time and frequency domain) have been obtained in 21 healthy volunteers during the following conditions: free breathing (rest); controlled breathing (resp); the first 5 minutes of postexercise recovery phases (exercisePeak), maximum sympathetic activation; and during the second 5 minutes of postexercise recovery phases (exerciseRecovery), intermediate sympathetic activation. Finally, we analyzed the whole repolarization (QTe), the QT peak (QTp), and T peak ‐ T end intervals (Te). Results: During the exercisePeak, major part of repolarization variables changed in comparison to the rest and resp conditions. Particularly, QTe, QTp, and Te standard deviations (QTeSD, QTpSD, and TeSD); variability indexes (QTeVI and QTpVI), normalized variances (QTeVN, QTpVN, and TeVN); and the ratio between short‐term QTe, QTp, and Te variability RR (STVQTe/RR, STVQTp/RR, and STVTe/RR) increased. During exerciseRecovery, QTpSD (P <.05), QTpVI (P <.05), QTeVN (P <.05), QTpVN (P <.001), TeVN (P <.05), STVQTe/RR (P <.05), STVQTp/RR (P <.001), and STVTe/RR (P <.001) were significantly higher in comparison to the rest. The slope between QTe (0.24 ± 0.06) or QTp (0.17 ± 0.06) and RR were significantly higher than Te (0.07 ± 0.06, P <.001). Conclusion: Heart rate and sympathetic activity, obtained during exercise, seem able to influence the time domain markers of myocardial repolarization dispersion in healthy subjects, whereas they do not alter any spectral components. pubtype: Academic Journal doctype: equations & formulas research tables/charts tracings Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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