February 1, 1999Acta Anaesthesiologica Scandinavica
Non‐invasive evaluation of left ventricular function by means of impedance cardiography
Key result
Electrical impedance cardiography indices, specifically the Heather index (r = -0.78, P<0.001) and RZ time (r = 0.75, P<0.001), correlated significantly with echocardiographic wall motion score.
Why the study?
Does electrical impedance cardiography accurately reflect left ventricular function compared to echocardiography in patients with coronary artery disease?
Population
8 patients with coronary artery disease undergoing a pharmacologically (dobutamine) induced stress test
Comparison
Electrical impedance cardiography during… vs Echocardiographically derived left ventricular…
Design
Cross-sectional
Authors
Discussion
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Implication
May support non-invasive LV monitoring in CAD; leaves open accuracy versus echocardiography pending prospective validation.
Study Design
Type
Cross-Sectional (n=8)
Structured PICO
Does electrical impedance cardiography accurately reflect left ventricular function compared to echocardiography in patients with coronary artery disease?
P
Population
8 patients with coronary artery disease undergoing a dobutamine stress test.
E
Exposure
Electrical impedance cardiography (EIC) during dobutamine infusion
C
Comparator
Echocardiographically derived left ventricular wall motion score (WMS)
O
Outcome
Correlation of EIC-derived left ventricular contractility indices with echocardiographically derived left ventricular wall motion score (WMS)surrogate
Main Result
Effect estimate: r = -0.78 (Heather index)
p-value: p=<0.001
The Heather index derived from electrical impedance cardiography correlates well with echocardiographic wall motion score during dobutamine stress testing, suggesting potential utility for continuous non-invasive left ventricular performance monitoring.
Cite This Study
Meer et al. (1999) conducted a cross-sectional in Coronary artery disease (n=8). Electrical impedance cardiography (EIC) vs. Echocardiographically derived left ventricular wall motion score (WMS) was evaluated on Correlation between EIC indices and wall motion score (r = -0.78 (Heather index), p=<0.001). Electrical impedance cardiography indices, specifically the Heather index (r = -0.78, P<0.001) and RZ time (r = 0.75, P<0.001), correlated significantly with echocardiographic wall motion score.