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Piskorski J, Kośmider M, Mieszkowski D, Żurek S, Biczuk B, Jurga S, Krauze T, Wykrętowicz A, Guzik P. Associations between heart rate asymmetry expression and asymmetric detrended fluctuation analysis results. Med Biol Eng Comput 2022; 60:2969-2979. [PMID: 36001222 PMCID: PMC9463330 DOI: 10.1007/s11517-022-02645-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/09/2022] [Indexed: 11/30/2022]
Abstract
Abstract The relation between recently established asymmetry in Asymmetric Detrended Fluctuation Analysis (ADFA) and Heart Rate Asymmetry is studied. It is found that the ADFA asymmetric exponents are related both to the overall variability and to its asymmetric components at all studied time scales. We find that the asymmetry in scaling exponents, i.e., \documentclass[12pt]{minimal}
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\begin{document}$$\alpha ^{+}<\alpha ^{-}$$\end{document}α+<α- is associated with both variance-based and runs-based types of asymmetry. This observation suggests that the physiological mechanisms of both types are similar, even though their origins and mathematical methods are very different. Graphical abstract The graphical abstract demonstrates strong, nonlinear association between the expression of Heart Rate Asymmetry measured using relative descriptors and the Asymmetric Detrended Fluctuation Analysis results. It is clear that there is a strong relation between the two theoretically disparate approaches to signal analysis. The technique to demonstrate the association is loess fit. ![]()
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Affiliation(s)
- J. Piskorski
- Institute of Physics, University of Zielona Góra, Zielona Góra, Poland
| | - M. Kośmider
- Institute of Physics, University of Zielona Góra, Zielona Góra, Poland
| | - D. Mieszkowski
- Institute of Physics, University of Zielona Góra, Zielona Góra, Poland
| | - S. Żurek
- Institute of Physics, University of Zielona Góra, Zielona Góra, Poland
| | - B. Biczuk
- Institute of Physics, University of Zielona Góra, Zielona Góra, Poland
| | - S. Jurga
- Faculty of Medicine and Health Sciences, University of Zielona Góra, Zielona Góra, Poland
| | - T. Krauze
- Department of Cardiology – Intensive Therapy, Poznań University of Medical Sciences, Poznań, Poland
| | - A. Wykrętowicz
- Department of Cardiology – Intensive Therapy, Poznań University of Medical Sciences, Poznań, Poland
| | - P. Guzik
- Department of Cardiology – Intensive Therapy, Poznań University of Medical Sciences, Poznań, Poland
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Nizinski J, Filberek P, Sibrecht G, Krauze T, Zielinski J, Piskorski J, Wykretowicz A, Guzik P. Non-invasive in vivo human model of post-ischaemic skin preconditioning by measurement of flow-mediated 460-nm autofluorescence. Br J Clin Pharmacol 2021; 87:4283-4292. [PMID: 33792076 DOI: 10.1111/bcp.14845] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 03/02/2021] [Accepted: 03/13/2021] [Indexed: 11/27/2022] Open
Abstract
AIMS Transient ischaemia and reperfusion (TIAR) induce early ischaemic preconditioning (IPC) in different tissues and organs, including the skin. IPC protects tissues by modifying the mitochondrial function and decreasing the amount of the reduced form of nicotinamide adenine dinucleotide (NADH). Skin 460-nm autofluorescence is proportional to the NADH content and can be non-invasively measured during TIAR. We propose a non-invasive in vivo human model of skin IPC for studying the effects of repeated TIARs on the NADH content. METHODS Fifty-one apparently healthy volunteers (36 women) underwent three 100-second forearm ischaemia episodes induced by inflation of brachial pressure cuff to the pressure of 60 mmHg above systolic blood pressure, followed by 500-second long reperfusion episodes. Changes in skin NADH content were measured using 460-nm fluorescence before and during each of the three TIARs. RESULTS The first two TIARs caused a significant reduction in the skin NADH content before (P = .0065) and during the third ischaemia (P = .0011) and reperfusion (P = .0003) up to 3.0%. During the third TIAR, the increase in skin NADH was 20% lower than during the first ischaemia (P = .0474). CONCLUSIONS The measurement of the 460-nm fluorescence during repeated TIARs allows for a non-invasive in vivo investigation of human skin IPC. Although IPC reduces the overall NADH skin content, the most noticeable NADH reduction appears during ischaemia after earlier TIARs. Studying the skin model of IPC may provide new avenues for in vivo physiological, clinical and pharmacological research on mitochondrial metabolism.
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Affiliation(s)
- Jan Nizinski
- Department of Cardiology Intensive Care Therapy and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Piotr Filberek
- Department of Cardiology Intensive Care Therapy and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Greta Sibrecht
- Department of Cardiology Intensive Care Therapy and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Tomasz Krauze
- Department of Cardiology Intensive Care Therapy and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Jacek Zielinski
- Department of Athletics, Strength and Conditioning, Poznan University of Physical Education, Poznan, Poland
| | | | - Andrzej Wykretowicz
- Department of Cardiology Intensive Care Therapy and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Przemyslaw Guzik
- Department of Cardiology Intensive Care Therapy and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
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Piskorski J, Ellert J, Krauze T, Grabowski W, Wykretowicz A, Guzik P. Testing heart rate asymmetry in long, nonstationary 24 hour RR-interval time series. Physiol Meas 2019; 40:105001. [PMID: 31499483 DOI: 10.1088/1361-6579/ab42d5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Heart rate asymmetry is a phenomenon in which the contribution of heart rate decelerations to short-term heart rate variability is greater than that of accelerations, and the contribution of accelerations to long-term and total variability is greater than that of decelerations. This has been established for short, stationary recordings, so our aim is to do it for long recordings. APPROACH In this paper, we analyze heart rate asymmetry in 87 long, 24 h electrocardiogram Holter recordings from healthy people. We show that in the whole recording all types of asymmetry are observable, clear and highly statistically significant. To analyze the local changes of asymmetry in time, we analyzed the recordings by disjoint jumping windows of 300 beats. MAIN RESULTS This analysis revealed that the local, averaged measures of all types of asymmetry also demonstrate its presence which is highly statistically significant. Additionally, we introduce in this paper a statistical test for asymmetry in a single long recording, as opposed to the current approach in which whole groups are tested. We do this by introducing the proportion of time spent in asymmetry for each recording and using it in the binomial tests. SIGNIFICANCE We found that for all the recordings most of the time is spent in asymmetry.
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Affiliation(s)
- J Piskorski
- Institute of Physics, University of Zielona Gora, Szafrana 4a, Zielona Gora, Poland
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Wykretowicz A, Schneider A, Krauze T, Szczepanik A, Banaszak A, Minczykowski A, Piskorski J, Guzik P. Pulse wave velocity to the global longitudinal strain ratio in survivors of myocardial infarction. Eur J Clin Invest 2019; 49:e13131. [PMID: 31120553 DOI: 10.1111/eci.13131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/07/2019] [Accepted: 05/19/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND New index of pulse wave velocity to global longitudinal peak systolic strain (PWV/GLPSS) was reported to be associated with cardiovascular damage. We evaluated the prognostic role of this metric in survivors of acute myocardial infarction (AMI). MATERIAL AND METHODS We investigated in 569 patients with AMI, whether PWV/GLPSS was associated with a composite endpoint of death, stroke or new myocardial infarction, in long-term follow-up. Left ventricular longitudinal strain was evaluated by speckle tracking, and carotid arterial stiffness (local PWV) was determined using radiofrequency data technology. RESULTS During follow-up (median 1316 days), 114 subjects reached composite endpoint. These subjects were significantly older (P < 0.0001) and were characterized by lower ejection fraction (P < 0.0001), lower GLPSS (P < 0.0001), higher PWV (P = 0.007) and lower PWV/GLPSS index (P < 0.0001). Patients with PWV/GLPSS <-0.74 were at a significantly higher risk for the composite endpoint during the follow-up (hazard rate: 1.7; 95% confidence interval: 1.2-2.6; P < 0.001). The PWV/GLPSS was additive to the predictive value of EF < 35%-patients with PWV/GLPSS <-0.74 and EF < 35% had the highest risk for the endpoint events. CONCLUSIONS The current study shows that PWV/GLPSS index has significant, independent and additive value in predicting CV complications, in subjects with myocardial infarction.
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Affiliation(s)
- Andrzej Wykretowicz
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Agata Schneider
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Tomasz Krauze
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Adam Szczepanik
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Agnieszka Banaszak
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Andrzej Minczykowski
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Jaroslaw Piskorski
- Institute of Physics, University of Zielona Gora, Zielona Góra, Poland.,Faculty of Medicine and Health Sciences, University of Zielona Gora, Zielona Gora, Poland
| | - Przemyslaw Guzik
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
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Wykretowicz M, Katulska K, Zwanzig M, Krauze T, Piskorski J, Guzik P, Wykretowicz A. Association of left atrial fibrosis with aortic excess pressure and white matter lesions. SCAND CARDIOVASC J 2019; 53:317-322. [DOI: 10.1080/14017431.2019.1645352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Mateusz Wykretowicz
- Department of Radiology, Poznan University of Medical Sciences, Poznan, Poland
| | - Katarzyna Katulska
- Department of Radiology, Poznan University of Medical Sciences, Poznan, Poland
| | - Marcin Zwanzig
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Tomasz Krauze
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Jaroslaw Piskorski
- Institute of Physics, University of Zielona Gora, Zielona Góra, Poland
- Faculty of Medicine and Health Sciences, University of Zielona Gora, Zielona Gora, Poland
| | - Przemyslaw Guzik
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Andrzej Wykretowicz
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
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Kaminski M, Prymas P, Konobrodzka A, Filberek P, Sibrecht G, Sierocki W, Osinska Z, Wykretowicz A, Lobodzinski S, Guzik P. Clinical stage of acquired immunodeficiency syndrome in HIV-positive patients impacts the quality of the touch ECG recordings. J Electrocardiol 2019; 55:87-90. [PMID: 31152996 DOI: 10.1016/j.jelectrocard.2019.05.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 05/05/2019] [Accepted: 05/21/2019] [Indexed: 11/25/2022]
Abstract
INTRODUCTION HIV patients are at higher risk for cardiovascular disease and cardiac arrhythmias which can be recorded by a handheld single‑lead ECG device. Quality of ECG depends on the skin condition, which worsens with the progression of HIV infection. OBJECTIVE To study the quality of the ECG signal acquired by a mobile ECG device in patients with different clinical stages of human immunodeficiency virus (HIV) infection. PATIENTS AND METHODS We studied the quality of 30-second single lead ECGs obtained by a handheld ECG device (Kardia; AliveCor Inc., San Francisco, USA) in 263 Kenyan adults (203 women) in various stages of HIV. The recordings were made during routine check-ups at the outpatient clinics. ECG quality was categorized as readable (not interfering with clinical interpretation) or unreadable (impossible clinical interpretation). The progression of the HIV infection was estimated using the World Health Organization AIDS Clinical Staging (WACS) scale, ranging from stage 1 (asymptomatic generalized lymphadenopathy) to stage 4 (wasting syndrome and Kaposi sarcoma). RESULTS The median age of patients was 46 (39-53) years. ECG was readable in 201 patients (76.4%) and unreadable in 62 (23.6%). The WACS score > 1 was associated with 3.95 odds ratio (95% confidence interval 2.14-7.29; p < 0.0001) for the acquiring an unreadable ECG (univariate logistic regression adjusted to age, sex, body mass index and time since HIV). CONCLUSIONS ECG quality recorded by a touch ECG device worsens with advancing HIV infection. For this reason, the accuracy of arrhythmia diagnosis by mobile ECG appears to be limited in HIV patients.
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Affiliation(s)
- Mikolaj Kaminski
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Piotr Prymas
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Anna Konobrodzka
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Piotr Filberek
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Greta Sibrecht
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Wojciech Sierocki
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Zofia Osinska
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Andrzej Wykretowicz
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland
| | - Suave Lobodzinski
- California State University, Department of Electrical and Biomedical Engineering, 1250 Bellflower Blvd, Long Beach, CA 90840, United States of America
| | - Przemyslaw Guzik
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, 49 Przybyszewskiego, 60-355 Poznan, Poland.
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Wykrętowicz A, Wykrętowicz M, Katulska K, Schneider A, Piskorski J, Guzik P. Brain structure loss in heart failure and its association with markers of left ventricular function. Pol Arch Intern Med 2019; 129:428-431. [DOI: 10.20452/pamw.4488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Guzik P, Piekos C, Pierog O, Fenech N, Krauze T, Piskorski J, Wykretowicz A. Classic electrocardiogram-based and mobile technology derived approaches to heart rate variability are not equivalent. Int J Cardiol 2018; 258:154-156. [PMID: 29544922 DOI: 10.1016/j.ijcard.2018.01.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 01/10/2018] [Accepted: 01/15/2018] [Indexed: 11/15/2022]
Abstract
We compared classic ECG-derived versus a mobile approach to heart rate variability (HRV) measurement. METHODS & RESULTS 29 young adult healthy volunteers underwent a simultaneous recording of heart rate using an ECG and a chest heart rate monitor at supine rest, during mental stress and active standing. Mean RR interval, Standard Deviation of Normal-to-Normal (SDNN) of RR intervals, and Root Mean Square of the Successive Differences (RMSSD) between RR intervals were computed in 168 pairs of 5-minute epochs by in-house software on a PC (only sinus beats) and by mobile application "ELITEHRV" on a smartphone (no beat type identification). ECG analysis showed that 33.9% of the recordings contained at least one non-sinus beat or artefact, the mobile app did not report this. The mean RR intervals were significantly longer (p = 0.0378), while SDNN (p = 0.0001) and RMSSD (p = 0.0199) were smaller for the mobile approach. CONCLUSIONS Measures of identical HRV parameters by ECG-based and mobile approaches are not equivalent.
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Affiliation(s)
- Przemyslaw Guzik
- Department of Cardiology - Intensive Therapy, Poznan University of Medical Science, Poznan, Poland.
| | - Caroline Piekos
- Department of Cardiology - Intensive Therapy, Poznan University of Medical Science, Poznan, Poland
| | - Olivia Pierog
- Department of Cardiology - Intensive Therapy, Poznan University of Medical Science, Poznan, Poland
| | - Naiman Fenech
- Department of Cardiology - Intensive Therapy, Poznan University of Medical Science, Poznan, Poland
| | - Tomasz Krauze
- Department of Cardiology - Intensive Therapy, Poznan University of Medical Science, Poznan, Poland
| | - Jaroslaw Piskorski
- Institute of Physics, University of Zielona Gora, Poland; Faculty of Medicine and Health Sciences, University of Zielona Gora, Poland
| | - Andrzej Wykretowicz
- Department of Cardiology - Intensive Therapy, Poznan University of Medical Science, Poznan, Poland
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Sibrecht G, Nizinski J, Filberek P, Zielinski J, Kusy K, Krauze T, Piskorski J, Michalak S, Wykretowicz A, Guzik P. P291Non-invasive in vivo human model of the involvement of human epidermal mitochondria in the early post-ischaemic preconditioning. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- G Sibrecht
- Poznan University of Medical Sciences, *Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - J Nizinski
- Poznan University of Medical Sciences, *Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - P Filberek
- Poznan University of Medical Sciences, *Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - J Zielinski
- Poznan University of Physical Education, Department of Athletics, Poznan, Poland
| | - K Kusy
- Poznan University of Physical Education, Department of Athletics, Poznan, Poland
| | - T Krauze
- Poznan University of Medical Sciences, *Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - J Piskorski
- Univesity of Zielona Gora, Institute of Physics, Zielona Gora, Poland
| | - S Michalak
- Poznan University of Medical Sciences, Department of Neurochemistry and Neuropathology, Poznan, Poland
| | - A Wykretowicz
- Poznan University of Medical Sciences, *Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - P Guzik
- Poznan University of Medical Sciences, *Department of Cardiology – Intensive Therapy, Poznan, Poland
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Filberek P, Nizinski J, Sibrecht G, Krauze T, Zielinski J, Kusy K, Piskorski J, Michalak S, Wykretowicz A, Guzik P. P160Sex differences in the flow-mediated epidermal fluorescence during forearm ischemia and reperfusion. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- P Filberek
- Poznan University of Medical Sciences, Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - J Nizinski
- Poznan University of Medical Sciences, Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - G Sibrecht
- Poznan University of Medical Sciences, Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - T Krauze
- Poznan University of Medical Sciences, Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - J Zielinski
- Poznan University of Physical Education, Department of Athletics, Poznan, Poland
| | - K Kusy
- Poznan University of Physical Education, Department of Athletics, Poznan, Poland
| | - J Piskorski
- Univesity of Zielona Gora, Institute of Physics, Zielona Gora, Poland
| | - S Michalak
- Poznan University of Medical Sciences, Department of Neurochemistry and Neuropathology, Poznan, Poland
| | - A Wykretowicz
- Poznan University of Medical Sciences, Department of Cardiology – Intensive Therapy, Poznan, Poland
| | - P Guzik
- Poznan University of Medical Sciences, Department of Cardiology – Intensive Therapy, Poznan, Poland
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Bishop SA, Dech RT, Guzik P, Neary JP. Heart rate variability and implication for sport concussion. Clin Physiol Funct Imaging 2017; 38:733-742. [PMID: 29144026 DOI: 10.1111/cpf.12487] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 10/19/2017] [Indexed: 12/12/2022]
Abstract
Finding sensitive and specific markers for sports-related concussion is both challenging and clinically important. Such biomarkers might be helpful in the management of patients with concussion (i.e. diagnosis, monitoring and risk prediction). Among many parameters, blood flow-pressure metrics and heart rate variability (HRV) have been used to gauge concussion outcomes. Reports on the relation between HRV and both acute and prolonged concussion recovery are conflicting. While some authors report on differences in the low-frequency (LF) component of HRV during postural manipulations and postexercise conditions, others observe no significant differences in various HRV measures. Despite the early success of using the HRV LF for concussion recovery, the interpretation of the LF is debated. Recent research suggests the LF power is a net effect of several intrinsic modulatory factors from both sympathetic and parasympathetic branches of the autonomic nervous system, vagally mediated baroreflex and even some respiratory influences at lower respiratory rate. There are only a few well-controlled concussion studies that specifically examine the contribution of the autonomic nervous system branches with HRV for concussion management. This study reviews the most recent HRV- concussion literature and the underlying HRV physiology. It also highlights cerebral blood flow studies related to concussion and the importance of multimodal assessment of various biological signals. It is hoped that a better understanding of the physiology behind HRV might generate cost-effective, repeatable and reliable protocols, all of which will improve the interpretation of HRV throughout concussion recovery.
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Affiliation(s)
- Scott A Bishop
- Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada
| | - Ryan T Dech
- Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada
| | - Przemyslaw Guzik
- Department of Cardiology-Intensive Care Therapy & Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - J Patrick Neary
- Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada
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Guzik P, Filberek P, Gomulska A, Kippen J, Kulczycka A, Nizinski J, Paschke S, Poczta Z, Popowicz P, Prymas P, Sibrecht G, Krauze T, Piskorski J, Wykretowicz A. P1578Feasibility of the acquisition of a legible single lead ECG using a mobile electrocardiograph in participants of mass sporting events. Europace 2017. [DOI: 10.1093/ehjci/eux158.204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Guzik P, Piekos C, Fenech N, Pierog O, Krauze T, Piskorski J, Wykretowicz A. 1305Heart Rate Variability by mobile app 'ELITE HRV' is not the same as computed from an ECG. Europace 2017. [DOI: 10.1093/ehjci/eux155.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bobkowski W, Stefaniak ME, Krauze T, Gendera K, Wykretowicz A, Piskorski J, Guzik P. Measures of Heart Rate Variability in 24-h ECGs Depend on Age but Not Gender of Healthy Children. Front Physiol 2017; 8:311. [PMID: 28572771 PMCID: PMC5435822 DOI: 10.3389/fphys.2017.00311] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 04/29/2017] [Indexed: 12/05/2022] Open
Abstract
Many methods computing heart rate variability (HRV) have been applied in studies in children. Not all of these methods have a comprehensive physiological interpretation, and not all of studies are in agreement with the Task Force Standards on HRV from 1996, and the New Joint Position Statement on the advances of HRV from 2015. The study aim was to analyse HRV in the 24-h ECGs of healthy children by the Poincare plots and Lomb-Scargle periodograms, and to follow proper HRV recommendations. Additionally, we investigated the associations between age, children's sex and measured HRV indices. One hundred healthy children, aged 3–18 underwent 24-h ECG Holter monitoring. HRV was analyzed by the Poincaré plots and spectral by Lomb-Scargle periodograms of RR intervals. The Mann-Whitney test was used to compare sex differences in HRV, the van Elteren's test was used to correct for the age-gender interaction, and non-parametric Spearman correlation was applied to analyse the association between age and HRV indices. None of the HRV measures differed significantly between boys and girls. None of the HRV indices was modified by the age-gender interaction. There were statistically significant associations of age with measures of ultra-low (rho = 0.42; p < 0.0001), very low (rho = 0.35; p = 00004) and low (rho = 0.30; p = 0.0028) frequency powers, the ratio of the low to high frequency power (rho = 0.38; p = 0.0001), indices of long-term (SD2; rho = 0.37; p = 0.0002) and total (SDNN; rho = 0.33; p = 0.0008) HRV, and the contribution of the long-term HRV to total HRV (CL; rho = 0.32; p = 0.0012). In general, HRV parameters derived from the analyses of Poincaré plots and Lomb-Scargle periodograms appear not to be affected by gender, however, most of them increase with age in the 24-h ECG recordings in healthy children.
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Affiliation(s)
- Waldemar Bobkowski
- Department of Pediatric Cardiology and Nephrology, Poznan University of Medical SciencesPoznan, Poland
| | - Magdalena E Stefaniak
- Department of Pediatric Cardiology and Nephrology, Poznan University of Medical SciencesPoznan, Poland
| | - Tomasz Krauze
- Department of Cardiology- Intensive Therapy and Internal Diseases, Poznan University of Medical SciencesPoznan, Poland
| | - Katarzyna Gendera
- Department of Pediatric Cardiology and Nephrology, Poznan University of Medical SciencesPoznan, Poland
| | - Andrzej Wykretowicz
- Department of Cardiology- Intensive Therapy and Internal Diseases, Poznan University of Medical SciencesPoznan, Poland
| | - Jaroslaw Piskorski
- Institute of Physics, University of Zielona GoraZielona Gora, Poland.,Faculty of Medicine and Health Sciences, University of Zielona GoraZielona Gora, Poland
| | - Przemyslaw Guzik
- Department of Cardiology- Intensive Therapy and Internal Diseases, Poznan University of Medical SciencesPoznan, Poland
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Bauer A, Camm AJ, Cerutti S, Guzik P, Huikuri H, Lombardi F, Malik M, Peng CK, Porta A, Sassi R, Schmidt G, Schwartz PJ, Stein PK, Yamamoto Y. Reference values of heart rate variability. Heart Rhythm 2017; 14:302-303. [DOI: 10.1016/j.hrthm.2016.12.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Alexander B, Britton S, Barbosa-Barros R, Pérez-Riera AR, de Mourão Matos IC, Guzik P, Baranchuk A. Massive J-waves in the context of intracranial hemorrhage. J Electrocardiol 2016; 50:142-143. [PMID: 27717572 DOI: 10.1016/j.jelectrocard.2016.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Indexed: 11/18/2022]
Abstract
Transient ST-segment elevation may be caused by conditions other than myocardial ischemia, among them intracranial hemorrhage. Recognition of the underlying etiology of these ST-segment changes is key because of the vastly different therapies used to treat them. We describe the case of a patient with massive transient J-waves and ST-segment elevation in the context of an intracranial hemorrhage.
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Affiliation(s)
- Bryce Alexander
- Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Samantha Britton
- Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | | | - Andrés R Pérez-Riera
- Cardiology Discipline, ABC Faculty, ABC Foundation, Santo André, São Paulo, Brazil
| | | | - Przemyslaw Guzik
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
| | - Adrian Baranchuk
- Department of Medicine, Queen's University, Kingston, Ontario, Canada.
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Abstract
Mobile electrocardiographs consist of three components: a mobile device (e.g. a smartphone), an electrocardiographic device or accessory, and a mobile application. Mobile platforms are small computers with sufficient computational power, good quality display, suitable data storage, and several possibilities of data transmission. Electrocardiographic electrodes and sensors for mobile use utilize unconventional materials, e.g. rubber, e-textile, and inkjet-printed nanoparticle electrodes. Mobile devices can be handheld, worn as vests or T-shirts, or attached to patient's skin as biopatches. Mobile electrocardiographic devices and accessories may additionally record other signals including respiratory rate, activity level, and geolocation. Large-scale clinical studies that utilize electrocardiography are easier to conduct using mobile technologies and the collected data are suitable for "big data" processing. This is expected to reveal phenomena so far inaccessible by standard electrocardiographic techniques.
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Affiliation(s)
| | - Marek Malik
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
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Zuchowski B, Blaszyk K, Piskorski J, Wykretowicz A, Wasniewski M, Gwizdala A, Seniuk W, Guzik P. 136-30: The variability of the HV conduction has asymmetrical features. Europace 2016. [DOI: 10.1093/europace/18.suppl_1.i97c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Bruining N, Caiani E, Chronaki C, Guzik P, van der Velde E. Acquisition and analysis of cardiovascular signals on smartphones: potential, pitfalls and perspectives. Eur J Prev Cardiol 2014; 21:4-13. [DOI: 10.1177/2047487314552604] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Nico Bruining
- Thoraxcenter, Erasmus Medical Center, the Netherlands
| | - Enrico Caiani
- Department of Electronics, Information and Biomedical Engineering, Politecnico di Milano, Italy
| | | | - Przemyslaw Guzik
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poland
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Katulska K, Wykrętowicz M, Minczykowski A, Krauze T, Milewska A, Piskorski J, Marciniak R, Stajgis M, Wysocki H, Guzik P, Wykrętowicz A. Gray matter volume in relation to cardio-vascular stiffness. J Neurol Sci 2014; 343:100-4. [DOI: 10.1016/j.jns.2014.05.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 04/18/2014] [Accepted: 05/19/2014] [Indexed: 01/09/2023]
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Piskorski J, Krauze T, Katulska K, Wykrętowicz M, Milewska A, Przymuszała D, Wysocki H, Wykrętowicz A, Guzik P. Contribution of arterial excess pressure and arterial stiffness to central augmentation pressure in healthy subjects. Int J Cardiol 2013; 168:2899-900. [DOI: 10.1016/j.ijcard.2013.03.166] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 03/30/2013] [Indexed: 01/09/2023]
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Katulska K, Milewska A, Wykretowicz M, Krauze T, Przymuszala D, Piskorski J, Stajgis M, Guzik P, Wysocki H, Wykrętowicz A. Arterial stiffness, body fat compartments, central hemodynamics, renal function and left atrial size. Scand J Clin Lab Invest 2013; 73:563-8. [PMID: 23957372 DOI: 10.3109/00365513.2013.821711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Left atrial (LA) size is an important predictor of stroke, death, and atrial fibrillation. It was demonstrated recently that body fat, arterial stiffness and renal functions are associated with LA diameter. However, data are lacking for comprehensive assessments of all these risk factors in a single population. Therefore, the aim of the present study was to investigate the association between LA size and different fat descriptors, central hemodynamics, arterial stiffness, and renal function in healthy subjects. METHODS To this end, body fat percentage, abdominal, subcutaneous fat, and general descriptors of body fat were estimated in 162 healthy subjects (mean age 51 years). Echocardiography was performed to assess LA diameter. Arterial stiffness and peripheral and central hemodynamics were estimated by digital volume pulse analysis and pulse wave analysis. Glomerular filtration rate was estimated by MDRD formula. RESULTS There were significant (p < 0.05) bivariate correlations between LA diameter and all descriptors of body fat (except subcutaneous fat). Arterial stiffness and estimated glomerular filtration rate (eGFR) were also significantly correlated with LA size. Multiple regression analysis including all significant confounders, such as sex, mean arterial pressure, arterial stiffness, eGFR and body fat descriptors, explained 35% of variance in LA diameter. CONCLUSIONS In conclusion, the present study reveals significant, independent relationships between body fat, arterial stiffness, and LA size.
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Bryl M, Krauze T, Piskorski J, Przymuszala D, Dziarmaga M, Barecka K, Kaczmarek J, Klimas K, Biczysko M, Guzik P. The higher value of high-voltage lead impedance is associated with a better clinical condition in heart failure patients with an implanted defibrillating device. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Guzik P, Piskorski J, Awan K, Krauze T, Fitzpatrick M, Baranchuk A. Obstructive sleep apnea and heart rate asymmetry microstructure during sleep. Clin Auton Res 2013; 23:91-100. [DOI: 10.1007/s10286-013-0188-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 01/08/2013] [Indexed: 01/29/2023]
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Castiglioni P, Żurek S, Piskorski J, Kośmider M, Guzik P, Cè E, Rampichini S, Merati G. Assessing sample entropy of physiological signals by the norm component matrix algorithm: application on muscular signals during isometric contraction. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:5053-5056. [PMID: 24110871 DOI: 10.1109/embc.2013.6610684] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Sample Entropy (SampEn) is a popular method for assessing the unpredictability of biological signals. Its calculation requires to preliminarily set the tolerance threshold r and the embedding dimension m. Even if most studies select m=2 and r=0.2 times the signal standard deviation, this choice is somewhat arbitrary. Effects of different r and m values on SampEn have been rarely assessed, because of the high computational burden of this task. Recently, however, a fast algorithm for estimating correlation sums (Norm Component Matrix, NCM) has been proposed that allows calculating SampEn quickly over wide ranges of r and m. The aim of our work is to describe the structure of SampEn of physiological signals with different complex dynamics as a function of m and r and in relation to the correlation sum. In particular, we investigate whether the criterion of "maximum entropy" for selecting r previously proposed for Approximate Entropy, also applies to SampEn; and whether information from correlation sums provides indications for the choice of r and m. For this aim we applied the NCM algorithm on electromyographic and mechanomyographic signals during isometric muscle contraction, estimating SampEn over wide ranges of r (0.01 ≤ r ≤ 5) and m (from 1 to 11). Results indicate that the "maximum entropy" criterion to select r in Approximate Entropy cannot be applied to SampEn. However, the analysis of correlation sums alternatively suggests to choose r that at any m maximizes the number of "escaping vectors", i.e., data points effectively contributing to the SampEn estimation.
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Guzik P, Zuchowski B, Blaszyk K, Seniuk W, Wasniewski M, Gwizdala A, Wykretowicz A, Piskorski J. Asymmetry of the Variability of Heart Rate and Conduction Time Between Atria and Ventricles. Circ J 2013; 77:2904-11. [DOI: 10.1253/circj.cj-13-0461] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Przemyslaw Guzik
- Department of Cardiology-Intensive Therapy and Internal Medicine, Poznan University of Medical Sciences
| | - Bartosz Zuchowski
- Department of Cardiology-Intensive Therapy and Internal Medicine, Poznan University of Medical Sciences
| | | | - Wojciech Seniuk
- Department of Cardiology, Poznan University of Medical Sciences
| | | | - Adrian Gwizdala
- Department of Cardiology, Poznan University of Medical Sciences
| | - Andrzej Wykretowicz
- Department of Cardiology-Intensive Therapy and Internal Medicine, Poznan University of Medical Sciences
| | - Jaroslaw Piskorski
- Department of Cardiology-Intensive Therapy and Internal Medicine, Poznan University of Medical Sciences
- Institute of Physics, University of Zielona Gora
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Katarzynska-Szymanska A, Ochotny R, Oko-Sarnowska Z, Wachowiak-Baszynska H, Krauze T, Piskorski J, Gwizdala A, Mitkowski P, Guzik P. Shortening baroreflex delay in hypertrophic cardiomyopathy patients -- an unknown effect of β-blockers. Br J Clin Pharmacol 2012; 75:1516-24. [PMID: 23126403 DOI: 10.1111/bcp.12027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 10/31/2012] [Indexed: 12/15/2022] Open
Abstract
AIMS Hypertrophic cardiomyopathy (HCM) is characterized by left ventricular hypertrophy and impaired diastolic and systolic function. Abnormal sympathetic-parasympathetic balance is a potential stimulus for left ventricular hypertrophy in HCM patients. β-Blockers are routinely used in HCM for their strong negative inotropic effect; however, these drugs also influence the sympathetic-parasympathetic balance. This study aimed to determine the autonomic control of the cardiovascular system and the autonomic effects of β-blockers in HCM patients treated or untreated with β-blockers. METHODS Among 51 HCM outpatients (18-70 years old; 29 men) there were 19 individuals with no medication and 32 subjects treated with a β-blocker. Fourteen age- and gender-matched (23-70 years old; nine men) healthy volunteers were enrolled in the control group. Continuous, non-invasive finger blood pressure was recorded during supine rest for 30 min. Autonomic regulation of the cardiovascular system was measured by heart rate variability and spontaneous baroreflex function (cross-correlation sequence method). RESULTS The mean pulse interval, time domain and spectral measures of heart rate variability and baroreflex sensitivity were comparable between HCM patients, treated or not with β-blockers, and the control group. However, the delay of the baroreflex was significantly longer in HCM patients who were not treated with β-blockers [2.0 (1.6-2.3) s] in comparison with HCM patients receiving β-blockers [1.4 (1.1-1.8) s; P = 0.0072] or control subjects [1.2 (0.8-1.8) s; P = 0.0025]. This delay did not differ between HCM patients treated with β-blockers and the control group. CONCLUSIONS Hypertrophic cardiomyopathy not treated with β-blockers is accompanied by prolonged baroreflex delay. The use of β-blockers normalizes this delay.
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Wykretowicz J, Guzik P, Krauze T, Marciniak R, Komarnicki M, Piskorski J, Wysocki H, Wykretowicz A. Fibrinogen and d-dimer in contrasting relation with measures of wave reflection and arterial stiffness. Scandinavian Journal of Clinical and Laboratory Investigation 2012; 72:629-34. [DOI: 10.3109/00365513.2012.727023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Wykretowicz A, Rutkowska A, Krauze T, Przymuszala D, Guzik P, Marciniak R, Wysocki H. Pulse pressure amplification in relation to body fatness. Br J Clin Pharmacol 2012; 73:546-52. [PMID: 22008022 DOI: 10.1111/j.1365-2125.2011.04129.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT Aortic-brachial pulse pressure amplification (PPA) is a measure of arterial elasticity and it is also an independent cardiovascular risk factor. The PPA is mainly determined by age, height, central and peripheral pressure waveforms characteristics, including measures of arterial stiffness and wave reflection. WHAT THIS STUDY ADDS In this study, however, we demonstrate that PPA is also significantly associated with indirect indices of body fatness. As the body fatness is treatable, our findings might be used as a reference for future studies on the effects of body fat reduction on PPA and the PPA-related cardiovascular risk. AIMS Arterial pressure transfer to the periphery is accompanied by pulse pressure amplification (PPA). Pulse pressure is influence by body fat. The purpose of the present study was to evaluate any possible inter-relation between body fatness and PPA in healthy subjects. METHODS Haemodynamic and wave reflection indices were estimated by pulse wave analysis. Body fat was measured by bio-impedance. RESULTS A total of 367 healthy volunteers (136 men and 231 women) was studied. Pulse pressure amplification correlated significantly with percentage of body fat (r=-0.53, P < 0.0001), age (r=-0.62, P < 0.0001), height (r= 0.43, P < 0.0001), heart rate (r= 0.28, P < 0.0001) and mean blood pressure (r=-0.29, P < 0.0001). The association of PPA with body fat was also significant in a multiple linear regression model. Age was an independent predictor of PPA and analysis of study subjects subdivided into two groups, those <50 years and those >50 years showed that body fatness correlated inversely and significantly with PPA in individuals both younger and older than 50 years (r=-0.44, P < 0.0001, r=-0.37, P < 0.0001 respectively). Augmentation pressure was also associated significantly with percentage of body fat in both subgroups (r= 0.48, P < 0.0001 and r= 0.49, P < 0.0001 respectively). CONCLUSIONS This study performed on healthy subjects showed that pulse pressure amplification is related to body fatness over a wide age range. Percentage body fat is significantly associated with augmentation pressure, a component of central pulse pressure.
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Affiliation(s)
- Andrzej Wykretowicz
- Department of Internal Medicine, Division of Cardiology-Intensive Therapy Department of General, Gastroenterological and Endocrinological Surgery, University School of Medicine, 49 Przybyszewskiego, Poznan, Poland.
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Guzik P, Piskorski J, Barthel P, Bauer A, Müller A, Junk N, Ulm K, Malik M, Schmidt G. Heart rate deceleration runs for postinfarction risk prediction. J Electrocardiol 2012; 45:70-6. [DOI: 10.1016/j.jelectrocard.2011.08.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Indexed: 10/17/2022]
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Karlsson D, Fallarero A, Brunhofer G, Guzik P, Prinz M, Holzgrabe U, Erker T, Vuorela P. Identification and characterization of diarylimidazoles as hybrid inhibitors of butyrylcholinesterase and amyloid beta fibril formation. Eur J Pharm Sci 2011; 45:169-83. [PMID: 22108346 DOI: 10.1016/j.ejps.2011.11.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 10/24/2011] [Accepted: 11/08/2011] [Indexed: 11/16/2022]
Abstract
In this contribution, a chemical collection of aromatic compounds was screened for inhibition on butyrylcholinesterase (BChE)'s hydrolase activity using Ellman's reaction. A set of diarylimidazoles was identified as highly selective inhibitors of BChE hydrolase activity and amyloid β (Aβ) fibril formation. New derivatives were synthesized resulting in several additional hits, from which the most active was 6c, 4-(3-ethylthiophenyl)-2-(3-thienyl)-1H-imidazole, an uncompetitive inhibitor of BChE hydrolase activity (IC₅₀ BChE=0.10 μM; K(i)=0.073 ± 0.011 μM) acting also on Aβ fibril formation (IC₅₀=5.8 μM). With the aid of structure-activity relationship (SAR) studies, chemical motifs influencing the BChE inhibitory activity of these imidazoles were proposed. These bifunctional inhibitors represent good tools in basic studies of BChE and/or promising lead molecules for AD therapy.
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Affiliation(s)
- Daniela Karlsson
- Pharmaceutical Sciences, Department of Biosciences, Abo Akademi University, BioCity, Artillerigatan 6A, FI-20520 Turku, Finland
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Abstract
We report on two new physiological phenomena: the long-term and total heart rate asymmetry, which describe a significantly larger contribution of heart rate accelerations to long-term and total heart rate variability. In addition to the existing pair of indices, SD1(d); SD1(a); which are based on partitioning short-term variance, we introduce two other pairs of descriptors based on partitioning longterm (SD2(d); SD2(a)) and total (SDNN(d); SDNN(a)) heart rate variability. The new asymmetric descriptors are used to analyze RR intervals time series derived from the 30-min ECG recordings of 241 healthy subjects resting in supine position. It is shown that both new types of asymmetry are present in 76% of the subjects. The new phenomena reported here are real physiological findings rather than artifacts of the method since they vanish after data shuffling.
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Affiliation(s)
- Jaroslaw Piskorski
- Institute of Physics, University of Zielona Gora, Szafrana 4a, Zielona Gora, Poland.
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Wykrętowicz M, Krauze T, Guzik P, Piskorski J, Markwitz W, Wykrętowicz A, Wysocki H. Arterial stiffness, central hemodynamics and wave reflection in normal pregnancy and control nonpregnant women. Eur J Obstet Gynecol Reprod Biol 2011; 159:49-52. [DOI: 10.1016/j.ejogrb.2011.06.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 05/13/2011] [Accepted: 06/09/2011] [Indexed: 10/18/2022]
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Guzik P, Piskorski J, Krauze T, Narkiewicz K, Wykretowicz A, Wysocki H. Asymmetric features of short-term blood pressure variability. Hypertens Res 2010; 33:1199-205. [DOI: 10.1038/hr.2010.138] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Fujii R, Fujita S, Waseda T, Oka Y, Takagi H, Tomizawa H, Sasagawa T, Makinoda S, Cavagna M, Braga DPAF, Figueira RCS, Aoki T, Maldonado LGL, Iaconelli A, Borges E, Prabhakar S, Dittrich R, Beckmann MW, Hoffmann I, Mueller A, Kjotrod S, Carlsen SM, Rasmussen PE, Holst-Larsen T, Mellembakken J, Thurin-Kjellberg A, Haapaniemi Kouru K, Morin Papunen L, Humaidan P, Sunde A, von During V, Pappalardo S, Valeri C, Crescenzi F, Manna C, Sallam HN, Polec A, Raki M, Tanbo T, Abyholm T, Fedorcsak P, Tabanelli C, Ferraretti AP, Feliciani E, Magli MC, Fasolino C, Gianaroli L, Wang T, Feng C, Song Y, Dong MY, Sheng JZ, Huang HF, Sayyah Melli M, Kazemi-shishvan M, Snajderova M, Zemkova D, Pechova M, Teslik L, Lanska V, Ketel I, Serne E, Stehouwer C, Korsen T, Hompes P, Smulders Y, Voorstemans L, Homburg R, Lambalk C, Bellver J, Martinez-Conejero JA, Pellicer A, Labarta E, Alama P, Melo MAB, Horcajadas JA, Agirregoitia N, Peralta L, Mendoza R, Exposito A, Matorras R, Agirregoitia E, Ajina M, Chaouache N, Gaddas M, Souissi A, Tabka Z, Saad A, Zaouali-Ajina M, Zbidi A, Eguchi N, Jinno M, Watanabe A, Hirohama J, Hatakeyama N, Choi YM, Kim JJ, Kim DH, Yoon SH, Ku SY, Kim SH, Kim JG, Lee KS, Moon SY, Hirohama J, Jinno M, Watanabe A, Eguchi N, Hatakeyama N, Jinno M, Watanabe A, Hirohama J, Eguchi N, Hatakeyama N, Xiong Y, Liang X, Li Y, Yang X, Wei L, Makinoda S, Tomizawa H, Fujita S, Takagi H, Oka Y, Waseda T, Sasagawa T, Fujii R, Utsunomiya T, Chu S, Li P, Akarsu S, Dirican EK, Akin KO, Kormaz C, Goktolga U, Ceyhan ST, Kara C, Nadamoto K, Tarui S, Ida M, Sugihara K, Haruki A, Hukuda A, Morimoto Y, Albu A, Albu D, Sandu L, Kong G, Cheung L, Lok I, Pinto A, Teixeira L, Figueiredo H, Pires I, Silva Carvalho JL, Pereira ML, Faut M, de Zuniga I, Colaci D, Barrios E, Oubina A, Terrado Gil G, Motta A, Colaci D, de Zuniga I, Horton M, Faut M, Sobral F, Gomez Pena M, Motta A, Gleicher N, Barad DH, Li YP, Zhao HC, Spaczynski RZ, Guzik P, Banaszewska B, Krauze T, Wykretowicz A, Wysocki H, Pawelczyk L, Sarikaya E, Gulerman C, Cicek N, Mollamahmutoglu L, Venetis CA, Kolibianakis EM, Toulis K, Goulis D, Loutradi K, Chatzimeletiou K, Papadimas I, Bontis I, Tarlatzis BC, Schultze-Mosgau A, Griesinger G, Schoepper B, Cordes T, Diedrich K, Al-Hasani S, Gomez R, Jovanovic V, Sauer CM, Shawber CJ, Sauer MV, Kitajewski J, Zimmermann RC, Bungum L, Jacobsson AK, Rosen F, Becker C, Andersen CY, Guner N, Giwercman A, Kiapekou E, Zapanti E, Boukelatou D, Mavreli T, Bletsa R, Stefanidis K, Drakakis P, Mastorakos G, Loutradis D, Malhotra N, Sharma V, Kumar S, Roy KK, Sharma JB, Ferraretti A, Gianaroli L, Magli MC, Crippa A, Stanghellini I, Robles F, Serdynska-Szuster M, Spaczynski RZ, Banaszewska B, Pawelczyk L, Kristensen SL, Ernst E, Toft G, Olsen SF, Bonde JP, Vested A, Ramlau-Hansen CH, Wang FF, Qu F, Ding GL, Huang HF, Gallot V, Genro V, Roux I, Scheffer JB, Frydman R, Fanchin R, Kanta Goswami S, Banerjee S, Chakravarty BN, Kabir SN, Seeber BE, Morandell E, Kurzthaler D, Wildt L, Dieplinger H, Tutuncu L, Bodur S, Dundar O, Ron - El R, Seger R, Komarovsky D, Kasterstein E, Komsky A, Maslansky B, Strassburger D, Ben-Ami I, Zhao XM, Ni RM, Lin L, Dong M, Tu CH, He ZH, Yang DZ, Karamalegos C, Polidoropoulos N, Papanikopoulos C, Stefanis P, Argyrou M, Doriza S, Sisi V, Moschopoulou M, Karagianni T, Mentorou C, Economou K, Davies S, Mastrominas M, Gougeon A, De Los Santos MJ, Garcia-Laez V, Martinez-Conejero JA, Horcajadas JA, Esteban F, Labarta E, Crespo J, Pellicer A, Li HWR, Anderson RA, Yeung WSB, Ho PC, Ng EHY, Yang HI, Lee KE, Seo SK, Kim HY, Cho SH, Choi YS, Lee BS, Park KH, Cho DJ, Hart R, Doherty D, Mori T, Hickey M, Sloboda D, Norman R, Huang RC, Beilin L, Freiesleben N, Lossl K, Johannsen TH, Loft A, Bangsboll S, Hougaard D, Friis-Hansen L, Christiansen M, Nyboe Andersen A, Thum MY, Abdalla H, Martinez-Salazar J, De la Fuente G, Kohls G, Pellicer A, Garcia Velasco JA, Yasmin E, Kukreja S, Barth J, Balen AH, Esra T, Var T, Citil A, Dogan M, Cicek N, Messini CI, Dafopoulos K, Chalvatzas N, Georgoulias P, Anifandis G, Messinis IE, Celik O, Hascalik S, Celik N, Sahin I, Aydin S, Hanna CW, Bretherick KL, Liu CC, Stephenson MD, Robinson WP, Louwers YV, Goodarzi MO, Taylor KD, Jones MR, Cui J, Kwon S, Chen YDI, Guo X, Stolk L, Uitterlinden AG, Laven JSE, Azziz R, Navaratnarajah R, Grun B, Sinclair J, Dafou D, Gayther S, Timms JF, Hardiman PJ, Ye Y, Wu R, Ou J, Kim SD, Jee BC, Lee JY, Suh CS, Kim SH, Jung JH, Moon SY, Opmeer BC, Broeze KA, Coppus SF, Collins JA, Den Hartog JE, Land JA, Van der Linden PJ, Marianowski P, Ng E, Van der Steeg JW, Steures P, Strandell A, Mol BW, Tarlatzi TB, Kyrou D, Mertzanidou A, Fatemi HM, Tarlatzis BC, Devroey P, Batenburg TE, Konig TE, Overbeek A, Hompes P, Schats R, Lambalk CB, Carone D, Vizziello G, Vitti A, Chiappetta R, Topcu HO, Yuksel B, Islimye M, Karakaya J, ozat M, Batioglu S, Kuchenbecker WK, Groen H, Bolster JH, van Asselt S, Wolffenbuettel BH, Land JA, Hoek A, Wu Y, Pan H, Chen X, Wang T, Huang H, Zavos A, Dafopoulos K, Georgoulias P, Messini CI, Verikouki C, Messinis IE, Van Os L, Vink-Ranti CQJ, Rijnders PM, Tucker KE, Jansen CAM, Lucco F, Pozzobon C, Lara E, Galliano D, Pellicer A, Ballesteros A, Ghoshdastidar B, Maity SP, Ghoshdastidar B, Ghoshdastidar S, Luna M, Vela G, Sandler B, Barritt J, Flisser ED, Copperman AB, Nogueira D, Prat L, Degoy J, Bonald F, Montagut J, Ghoshdastidar S, Maity S, Ghoshdastidar B, Chen S, Chen X, Luo C, Zhen H, Shi X, Wu F, Ni Y, Merdassi G, Chaker A, Kacem K, Benmeftah M, Fourati S, Wahabi D, Zhioua F, Zhioua A, Saini P, Saini A, Sugiyama R, Nakagawa K, Nishi Y, Jyuen H, Kuribayashi Y, Sugiyama R, Inoue M, Jancar N, Vrtacnik Bokal E, Virant-Klun I, Lee JH, Kim SG, Cha EM, Park IH, Lee KH, Dahdouh EM, Desrosiers P, St-Michel P, Villeneuve M, Fontaine JY, Granger L, Ramon O, Matorras R, Burgos J, Abanto E, Gonzalez M, Mugica J, Corcostegui B, Exposito A, Tal J, Ziskind G, Ohel G, Paltieli Y, Paz G, Lewit N, Sendel H, Khouri S, Calderon I, van Gelder P, Al-Inany HG, Antaki R, Dean N, Lapensee L, Racicot M, Menard S, Kadoch I, Meylaerts LJ, Dreesen L, Vandersteen M, Neumann C, Zollner U, Kato K, Segawa T, Kawachiya S, Okuno T, Kobayashi T, Takehara Y, Kato O, Jayaprakasan K, Nardo L, Hopkisson J, Campbell B, Raine-Fenning N. Posters * Reproductive Endocrinology (i.e. PCOS, Menarche, Menopause etc.). Hum Reprod 2010. [DOI: 10.1093/humrep/de.25.s1.438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Guzik P, Piskorski J, Contreras P, Migliaro ER. Asymmetrical properties of heart rate variability in type 1 diabetes. Clin Auton Res 2010; 20:255-7. [DOI: 10.1007/s10286-010-0057-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Accepted: 01/31/2010] [Indexed: 11/28/2022]
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Piskorski J, Guzik P. Dynamic Decomposition of Poincaré Plots for Multivariate Analysis and Visualization of Simultaneously Recorded Physiological Time Series. ACTA ACUST UNITED AC 2010. [DOI: 10.12921/cmst.2010.16.02.181-186] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Wykretowicz A, Gerstenberger P, Guzik P, Milewska A, Krauze T, Adamska K, Rutkowska A, Wysocki H. Arterial stiffness in relation to subclinical atherosclerosis. Eur J Clin Invest 2009; 39:11-6. [PMID: 19087126 DOI: 10.1111/j.1365-2362.2008.02057.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Increased arterial stiffness or arteriosclerosis, represents a physiological part of ageing. Atherosclerosis is a process that does not affect the arterial bed uniformly but has a variable local distribution and is frequently superimposed on stiffened vessels. We therefore addressed the question of whether any correlation exists between the general characteristics of arterial stiffness or wave reflection and subclinical atherosclerosis as assessed by carotid intima-media thickness (IMT) in a sample of healthy subjects. METHODS A total of 116 healthy subjects (mean age 55 years, 43 female) were evaluated. Arterial stiffness and wave reflection was assessed with the use of digital volume pulse analysis (DVP) and pulse wave analysis (PWA). Subclinical atherosclerosis was assessed by measurement of IMT. RESULTS Stiffness Index (SI(DVP)), the measure of general arterial stiffness correlated significantly with IMT (r = 0.37, P < 0.01). IMT correlated significantly with age (r = 0.5, P < 0.0001), waist to hip ratio (WHR) (r = 0.39, P < 0.0001) and mean blood pressure (BPmean) (r = 0.4, P < 0.0001). IMT did not correlate with measures of wave reflection. SI(DVP) correlated significantly with age (r = 0.32, P < 0.005), WHR (r = 0.36, P < 0.0001), BPmean (r = 0.36, P < 0.0001) and measurements of wave reflection. However analysis of a model which included variables that significantly influenced SI(DVP) and IMT, such as age, WHR and mean BP showed that arterial stiffness is not independently associated with subclinical atherosclerosis. CONCLUSIONS The indices of subclinical atherosclerosis, arterial stiffness and wave reflection, indicate different aspects of vascular status in otherwise healthy subjects.
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Affiliation(s)
- A Wykretowicz
- Department of Internal Medicine, Division of Cardiology-Intensive Therapy, University School of Medicine, Poznan, Poland.
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Bauer A, Malik M, Schmidt G, Barthel P, Bonnemeier H, Cygankiewicz I, Guzik P, Lombardi F, Müller A, Oto A, Schneider R, Watanabe M, Wichterle D, Zareba W. Heart rate turbulence: standards of measurement, physiological interpretation, and clinical use: International Society for Holter and Noninvasive Electrophysiology Consensus. J Am Coll Cardiol 2008; 52:1353-65. [PMID: 18940523 DOI: 10.1016/j.jacc.2008.07.041] [Citation(s) in RCA: 260] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2008] [Revised: 06/18/2008] [Accepted: 07/10/2008] [Indexed: 01/09/2023]
Abstract
This consensus statement has been compiled on behalf of the International Society for Holter and Noninvasive Electrophysiology. It reviews the topic of heart rate turbulence (HRT) and concentrates on technologies for measurement, physiologic background and interpretation, and clinical use of HRT. It also lists suggestions for future research. The phenomenon of HRT refers to sinus rhythm cycle-length perturbations after isolated premature ventricular complexes. The physiologic pattern of HRT consists of brief heart rate acceleration (quantified by the so-called turbulence onset) followed by more gradual heart rate deceleration (quantified by the so-called turbulence slope) before the rate returns to a pre-ectopic level. Available physiologic investigations confirm that the initial heart rate acceleration is triggered by transient vagal inhibition in response to the missed baroreflex afferent input caused by hemodynamically inefficient ventricular contraction. A sympathetically mediated overshoot of arterial pressure is responsible for the subsequent heart rate deceleration through vagal recruitment. Hence, the HRT pattern is blunted in patients with reduced baroreflex. The HRT pattern is influenced by a number of factors, provocations, treatments, and pathologies reviewed in this consensus. As HRT measurement provides an indirect assessment of baroreflex, it is useful in those clinical situations that benefit from baroreflex evaluation. The HRT evaluation has thus been found appropriate in risk stratification after acute myocardial infarction, risk prediction, and monitoring of disease progression in heart failure, as well as in several other pathologies.
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Affiliation(s)
- Axel Bauer
- Deutsches Herzzentrum, Medizinische Klinik der Technischen Universität München, Munich, Germany
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Guzik P, Spaczynski R, Banaszewska B, Krazue T, Wykretowicz A, Pawelczyk L. Abnormal arterial blood pressure in overweight and obese young polycystic ovary syndrome women. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Spaczynski R, Guzik P, Banaszewska B, Krauze T, Wykretowicz A, Pawelczyk L. Endocrine and hormonal regulation of myocardial oxygen demand in polycystic ovary syndrome women and healthy controls. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Guzik P, Wykretowicz A, Krauze T, Piskorski J, Adamska K, Milewska A, Wesseling KH, Wysocki H. Add-on therapy with a nighttime dose of doxazosin in patients with uncontrolled hypertension: effects on autonomic modulation of the cardiovascular system. Hypertens Res 2008; 31:443-53. [PMID: 18497463 DOI: 10.1291/hypres.31.443] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study was designed to determine whether or not the addition of a single nighttime dose of doxazosin in extended-release form (GITS; gastrointestinal therapeutic system) would affect the autonomic modulation of the cardiovascular system in patients with uncontrolled hypertension treated with a multi-drug regimen. Resting 5-min noninvasive finger blood pressure and ECG signals, as well as 24-h Holter ECGs, were recorded in 30 patients with uncontrolled hypertension on multi-drug treatment before and after 16-week add-on therapy with doxazosin GITS. Cardiovascular autonomic modulation was evaluated by spectral analysis of heart rate variability (HRV) and a cross-correlation method for spontaneous baroreflex sensitivity (BRS) in 5-min resting recordings, and by the analysis of Poincaré plots and phase-rectified signal averaging of the duration of cardiac cycles in 24-h ECG recordings. This combined therapy significantly reduced systolic pressure (19.4+/-3.5 mmHg; p<0.0001), diastolic blood pressure (9.4+/-2.0 mmHg; p=0.0003), and pulse pressure (10.0+/-2.8 mmHg; p=0.0021). Concomitantly, there was a significant increase in resting spontaneous BRS (p=0.0191) and increases in 24-h short-term (p=0.0129) and total (p=0.0153) HRV, but with no significant change in heart rate or other measures of HRV. The improvements in HRV and BRS were observed mainly in patients already treated with thiazide diuretics. There was a significant association (r=0.49; p=0.0065) between the degree of change in diastolic blood pressure and short-term HRV caused by the combined treatment. The addition of 4 mg doxazosin GITS to multi-drug antihypertensive therapy is associated with an improvement in cardiovascular autonomic control.
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Affiliation(s)
- Przemyslaw Guzik
- Department of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland
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Wykretowicz A, Adamska K, Guzik P, Krauze T, Wysocki H. INDICES OF VASCULAR STIFFNESS AND WAVE REFLECTION IN RELATION TO BODY MASS INDEX OR BODY FAT IN HEALTHY SUBJECTS. Clin Exp Pharmacol Physiol 2007; 34:1005-9. [PMID: 17714086 DOI: 10.1111/j.1440-1681.2007.04666.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
1. Obesity appears to influence vascular stiffness, an important cardiovascular risk factor. An accurate picture of arterial stiffness may be obtained when a combination of various techniques is used. 2. The purpose of the present study was to assess whether the body mass index (BMI) and body fat content obtained by bioimpedance were of equal value in estimating the influence of body fatness on various indices of vascular stiffness and wave reflection. 3. A total of 175 healthy subjects was studied. Anthropometric measurements and total body bio-impedance analysis were performed to assess fat mass as a proportion of total body composition. Arterial stiffness and wave reflection were assessed using digital volume pulse analysis and tonometric measurement of the wave reflection indices and central haemodynamics. 4. Significant differences in the stiffness index (SI(DVP); P < 0.0001), peripheral augmentation index (pAI(x); P < 0.0001), central augmentation index (cAI(x); P < 0.0001), peripheral pulse pressure (pPP; P = 0.026) and central pulse pressure (cPP; P < 0.0001) were found when the population examined was divided accordingly to tertile of body fat content. However, subdividing various indices of arterial stiffness according to the tertile of BMI did not reveal any significant differences between groups, except for pPP and cPP. 5. Body fat content was significantly correlated with SI(DVP), pAI(x), cAI(x), pPP and cPP. The BMI correlated weakly with SI(DVP), pPP and cPP. 6. In conclusion, the BMI is not very useful in predicting changes in arterial stiffness and wave reflection due to obesity. However, stiffness and wave reflection indices derived from digital volume pulse analysis, the characteristics of radial and aortic pressure waveforms and peripheral and aortic pulse pressure are all related to body fat content, as estimated by bioimpedance.
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Affiliation(s)
- Andrzej Wykretowicz
- Department of Internal Medicine, Division of Cardiology-Intensive Therapy, University School of Medicine, Poznan, Poland.
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Wykretowicz A, Adamska K, Krauze T, Guzik P, Szczepanik A, Rutkowska A, Wysoki H. The plasma concentration of advanced oxidation protein products and arterial stiffness in apparently healthy adults. Free Radic Res 2007; 41:645-9. [PMID: 17516236 DOI: 10.1080/10715760701236741] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Oxidative stress plays an important role in the pathogenesis of atherosclerosis. Advanced oxidation protein products (AOPP) are markers of oxidative stress and mediators of inflammation. Increased arterial stiffness is associated with increased risk of cardiovascular mortality and morbidity. The aim of this study was to evaluate the relationship between an indirect marker of arterial stiffness and the AOPP level in apparently healthy individuals. METHODS AND RESULTS Arterial stiffness was estimated with the use of the stiffness index (SI(DVP)) which significantly correlated with age, mean blood pressure, body fat content and AOPP. The SI(DVP) was associated with AOPP concentration in both single (R = 0.22, p = 0.03) and multiple regression models adjusted for age, sex, mean blood pressure and body fat content (R(2) = 42%, p < 0.0001). CONCLUSIONS The AOPP concentration is elevated in healthy people with increased values of stiffness index. This finding supports the concept that oxidative stress may contribute to arterial stiffening in humans.
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Affiliation(s)
- Andrzej Wykretowicz
- Division of Cardiology-Intensive Therapy, Department of Internal Medicine, University School of Medicine, Poznan, Poland.
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Wykretowicz A, Guzik P, Krauze T, Adamska K, Milewska A, Wysocki H. Add-on therapy with doxazosin in patients with hypertension influences arterial stiffness and albuterol-mediated arterial vasodilation. Br J Clin Pharmacol 2007; 64:792-5. [PMID: 17635498 PMCID: PMC2198780 DOI: 10.1111/j.1365-2125.2007.02980.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
AIMS Doxazosin is an antihypertensive agent with largely unknown effects on arterial stiffness and vasodilation. The aim of this study was to determine the effect of the addition of doxazosin extended-release (ER) to the standard management of hypertension in patients with inadequately controlled blood pressure (BP) on arterial stiffness and arterial vasodilation. METHODS Twenty patients with inadequately controlled hypertension were treated with 4 mg doxazosin ER daily for 16 weeks as an adjunct to their existing antihypertensive regimen. RESULTS Doxazosin ER add-on therapy was associated with significantly reduced systolic (P < 0.0001) and diastolic (P = 0.0003) BP, improved arterial stiffness (determined by digital volume pulse analysis (P = 0.048) and albuterol-mediated arterial vasodilation (P = 0.030). CONCLUSIONS Add-on therapy with 4 mg of doxazosin ER daily reduces BP and arterial stiffness and improves arterial vasodilation in response to adrenergic stimulation.
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Affiliation(s)
- Andrzej Wykretowicz
- Division of Cardiology-Intensive Therapy, Poznan University of Medical Sciences, Poznan, Poland.
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Bobkowski W, Czyz K, Guzik P, Krauze T, Wieczorek-Filipiak M, Piskorski J, Siwinska A. Autonomic control of the cardiovascular system is changed in children and adolescents with mitral valve prolapse. J Electrocardiol 2007. [DOI: 10.1016/j.jelectrocard.2007.03.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bobkowski W, Czyz K, Guzik P, Krauze T, Wieczorek-Filipiak M, Piskorski J, Siwinska A. Relation between muscle strength and autonomic modulation of the cardiovascular system in children and adolescents. J Electrocardiol 2007. [DOI: 10.1016/j.jelectrocard.2007.03.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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