Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Time-frequency characterization of simultaneous intra-atrial and electrocardiographic recordings during atrial fibrillation

Publiceringsår: 2005
Språk: Engelska
Sidor: 347-350
Publikation/Tidskrift/Serie: Computers in Cardiology 2005
Volym: 32
Dokumenttyp: Konferensbidrag
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


A new method for characterization of simultaneous intra-atrial and ECG recordings during atrial fibrillation (AF) is presented. With different preprocessing, both types of signals are characterized using a logarithmic time-frequency distribution from which trends of frequency, regularity, morphology (only ECG) and signal quality are extracted. The objective of the study is to relate ECG measures of rate and morphology to measures of intra-atrial organisation. The algorithm has been tested on a database with simultaneous ECG and right atrial recordings from 34 patients with drug-refractory AF. The average frequency in lead V1 was 5.91 Hz (std=0.94) and the average exponential decay of harmonic magnitudes (reflecting the morphology) in V1 was 1.31 (std=0.38); their correlation coefficient was 0.53 (p<0.001). The correlation coefficient between spatial frequency dispersion in the right atrium and harmonic decay was 0.53 (p<0.005). More organized AF, observed in patients treated with amiodarone, was reflected by a lower frequency, smaller right atrial frequency dispersion and lower exponential decay


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • harmonic decay
  • right atrium
  • electrocardiography
  • intra-atrial recordings
  • atrial fibrillation
  • ECG
  • spatial frequency dispersion
  • logarithmic time-frequency distribution
  • correlation coefficient
  • drug-refractory AF


Computers in Cardiology, 2005
  • ISBN: 0-7803-9337-6

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen