Document Detail

Stroke volume and systolic time intervals: beat-to-beat comparison between echocardiography and ambulatory impedance cardiography in supine and tilted positions.
MedLine Citation:
PMID:  15503973     Owner:  NLM     Status:  MEDLINE    
The aim of the study was to compare stroke volume (SV), ejection time (ET) and pre-ejection period (PEP) measurements obtained using a central haemodynamics ambulatory monitoring device based on impedance cardiography (ICG), in supine and tilted positions (60 degrees), with pulsed Doppler echocardiography as a non-invasive reference method. The Holter-type ICG device was used for off-line, beat-to-beat, automatic determination of SV, ET and PEP. ICG data were compared with those obtained simultaneously using pulsed Doppler echocardiography in the ascending aorta from a suprasternal projection, 1 min before and 10 min after tilting. The tests were performed in 13 young, healthy subjects (six men and seven women, aged 23-33 years). Linear regression between the measured values obtained for all subjects was described by the following formulas: SVicg= 13.9 + 0.813 x SVecho (r = 0.857, SEE = 9.03, n = 496), ETicg = 16.8 + 0.987 x ETecho (r = 0.841, SEE=21.3, n = 496), PEPicg= 22.8 + 0.890 x PEPecho (r = 0.727, SEE = 14.6, n = 496). The data showed that ambulatory impedance cardiography gives useful absolute values of SV and systolic time intervals measured in supine and tilted positions.
G Cybulski; E Michalak; E Koźluk; A Piatkowska; W Niewiadomski
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medical & biological engineering & computing     Volume:  42     ISSN:  0140-0118     ISO Abbreviation:  Med Biol Eng Comput     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-10-26     Completed Date:  2004-12-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7704869     Medline TA:  Med Biol Eng Comput     Country:  England    
Other Details:
Languages:  eng     Pagination:  707-11     Citation Subset:  IM    
Department of Applied Physiology, Medical Research Centre, Warsaw, Poland.
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MeSH Terms
Cardiography, Impedance / methods
Echocardiography, Doppler, Pulsed / methods
Monitoring, Ambulatory / methods
Posture / physiology*
Stroke Volume / physiology*
Tilt-Table Test

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