NDLI: Systolic Time Ratio by Impedance Cardiography to Distinguish Preserved vs Impaired Left Ventricular Systolic Function in Heart Failure

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Systolic Time Ratio by Impedance Cardiography to Distinguish Preserved vs Impaired Left Ventricular Systolic Function in Heart Failure

Content Provider	Scilit
Author	Thompson, Brenda Drazner, Mark H. Dries, Daniel L. Yancy, Clyde W.
Copyright Year	2008
Description	Journal: Congestive Heart Failure Left ventricular ejection fraction (EF) is used to assess patients with heart failure (HF); however, frequent measurements are not cost-effective. Impedance cardiography (ICG) is a low-cost, noninvasive test that measures systolic time intervals and may be a method for detecting impaired vs intact EF. This study evaluated the relationship between EF by echocardiography or gated nuclear ventriculography and systolic time ratio (STR) by ICG in outpatients with chronic HF. A retrospective chart review identified 52 patients with EF and STR measured within 2 weeks. There was an inverse correlation between STR and EF (r=-0.54; P<.001). The area under the receiver operating characteristic curve for STR to identify reduced EF was 0.86. An EF < or =50% and STR > or =0.50 demonstrated 93% sensitivity and 85% specificity. STR was able to distinguish intact (>50%) from impaired EF (< or =50%). STR by ICG has the potential to be a reliable method to monitor ventricular function in chronic HF.
Related Links	http://onlinelibrary.wiley.com/doi/10.1111/j.1751-7133.2008.00001.x/pdf
Ending Page	265
Page Count	5
Starting Page	261
ISSN	15275299
e-ISSN	17517133
DOI	10.1111/j.1751-7133.2008.00001.x
Journal	Congestive Heart Failure
Issue Number	5
Volume Number	14
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2008-10-21
Access Restriction	Open
Subject Keyword	Journal: Congestive Heart Failure Cardiology and Cardiovascular Diseases
Content Type	Text
Resource Type	Article
Subject	Emergency Medicine Emergency Nursing Cardiology and Cardiovascular Medicine

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