Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Knud Særmark"'
Autor:
Rikke Moerch Joergensen, Jørgen K. Kanters, Arne Hagemann, Annette Vestergaard, Knud Særmark, Poul Erik Bloch Thomsen, Thomas Jensen, Jens Haarbo
Publikováno v:
Heart Rhythm. 2:797-803
Background Ventricular extrasystoles are characterized by a fixed coupling interval to the last QRST complex preceding it. Objectives We hypothesized that this QRST complex differed from QRST complexes of other sinus beats not followed by ventricular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d976b5e70375079601831309e67a547
https://doi.org/10.1016/j.hrthm.2005.04.023
https://doi.org/10.1016/j.hrthm.2005.04.023
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 311:260-274
We present a new method to describe time series with a highly complex time evolution. The time series is projected onto a two-dimensional phase–space plot which is quantified in terms of a multipole expansion where every data point is assigned a un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3a94110b2f7e8301094ff61455fe48b
https://doi.org/10.1016/s0378-4371(02)00831-2
https://doi.org/10.1016/s0378-4371(02)00831-2
Autor:
Knud Særmark, Jacob Levitan, B. Boberg, Meir Lewkowicz, S. Pehrsson, H. Moelgaard, P. E. Bloch Thomsen
Publikováno v:
Fractals. :273-285
We present a probability analysis of RR interval series. The analysis is based on a subdivision of the RR interval series into segments — here called m-segments — ranging from one local RR maximum value to the consecutively following local RR max
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0638eac8893b2140c827dc7e3121c1a6
https://doi.org/10.1142/s0218348x01000762
https://doi.org/10.1142/s0218348x01000762
Autor:
Yosef Ashkenazy, U. Hintze, Knud Særmark, Meir Lewkowicz, P. E. Bloch Thomsen, Shlomo Havlin, M. Moller, Heikki V. Huikuri, H. Moelgaard, Jacob Levitan
Publikováno v:
Europhysics Letters (EPL). 53:709-715
We study the correlation properties of heartbeat fluctuations using scale-specific variance (root-mean-square fluctuation) and scaling (correlation) exponents as measures of healthy and cardiac impaired individuals. Our results show that the variance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a5d2e82b679ce40959a183340b7421c
https://doi.org/10.1209/epl/i2001-00208-x
https://doi.org/10.1209/epl/i2001-00208-x
Autor:
P. E. Bloch Thomsen, Heikki V. Huikuri, Knud Særmark, M. Moeller, U. Hintze, Meir Lewkowicz, T. Makikiallio, Jacob Levitan, H. Moelgaard
Publikováno v:
Fractals. :315-322
We compare three recently applied methods for analyzing heart rate variability: detrended fluctuation analysis (DFA), multiresolution wavelet analysis (WAV) and detrended time series analysis (DTS). In the comparison, both scale-dependent and scale-i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83bca585187d9a370c4dd1afce7b1fbd
https://doi.org/10.1142/s0218348x00000470
https://doi.org/10.1142/s0218348x00000470
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 268:207-213
It is shown that the Zeno effect is due to the removal of the decay products. If repetitive screenings take place within the interval of the quadratically decreasing survival possibility the regeneration term does not approach zero and the decay is m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a93a694622283b11a0f394b1a0477cf
https://doi.org/10.1016/s0378-4371(99)00016-3
https://doi.org/10.1016/s0378-4371(99)00016-3
Autor:
Jacob Levitan, Shlomo Havlin, Meir Lewkowicz, H. Moelgaard, Yosef Ashkenazy, Knud Særmark, P. E. Bloch Thomsen
Publikováno v:
Fractals. :85-91
Multiresolution Wavelet Transform and Detrended Fluctuation Analysis have recently been proven to be excellent methods in the analysis of Heart Rate Variability and in distinguishing between healthy subjects and patients with various dysfunctions of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1e548038daa61865156e244fc84f066
https://doi.org/10.1142/s0218348x99000104
https://doi.org/10.1142/s0218348x99000104
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 236:363-375
We show that a simple non-linear system of ordinary differential equations may possess a time varying attractor dimension. This indicates that it is infeasible to characterize EEG and MEG time series with a single time global dimension. We suggest an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::717956992ecb27d658fc2a50eba94cbf
https://doi.org/10.1016/s0378-4371(96)00367-6
https://doi.org/10.1016/s0378-4371(96)00367-6
Autor:
Christian Jons, Thue Olsen, Thomas Fritz Hansen, Arne Johannessen, Scott McNitt, Mark C. Haigney, Poul Erik Bloch Thomsen, Peter Søgaard, Knud Særmark
Publikováno v:
Heart rhythm. 9(1)
We recently demonstrated local voltage potentials indicating conduction impairment and block in the sinus beats preceding ventricular premature beats (VPBs) originating in the ventricular outflow tracts.The purpose of this study was to test the hypot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6634e02b6b4caef805a7599c9c1bbfeb
https://pubmed.ncbi.nlm.nih.gov/21888885
https://pubmed.ncbi.nlm.nih.gov/21888885
Autor:
Jørgen K. Kanters, Thomas Fritz Hansen, Knud Særmark, James Hansen, Peter Søgaard, Liselotte Klint Christiansen, Jens Haarbo, Arne Johannessen, Poul Erik Bloch Thomsen, Christian Jons, Charles Antzelevitch
Publikováno v:
Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology. 12(6)
Aims Discrete, fragmented, local voltage potentials (LVPs) have been observed in electrograms recorded at the ablation site in patients undergoing radiofrequency ablation for arrhythmias originating in both the right and left ventricular outflow trac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2c9a77a5e73053ffa7f7934f96c51ce
https://pubmed.ncbi.nlm.nih.gov/26017470
https://pubmed.ncbi.nlm.nih.gov/26017470