Reproducibility of Impedance Cardiography Hemodynamic Measures in Clinically Stable Heart Failure Patients
Key result
BioZ impedance cardiography measurements were reproducible at a one-week interval and responsive to activity-rest changes in 62 outpatients with clinically stable heart failure.
Why the study?
Are impedance cardiography measurements reproducible over a one-week interval in clinically stable heart failure outpatients?
Population
62 outpatients with clinically stable heart failure treated at a university medical center heart failure…
Design
Cohort
Follow-up
1 week
Authors
Discussion
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Implication
May inform noninvasive outpatient monitoring in stable HF; leaves open prospective outcome trials before clinical adoption.
Study Design
Type
Observational (n=62)
Multicenter
No
Structured PICO
Are impedance cardiography measurements reproducible over a one-week interval in clinically stable heart failure outpatients?
P
Population
62 outpatients with clinically stable heart failure evaluated for hemodynamic variability over a one-week period.
E
Exposure
Impedance cardiography measurements (BioZ device) obtained at 2, 10, and 60 minutes resting following a 40-50 foot walk on day 1, and at 2 and 10 minutes resting following a walk one week later.
O
Outcome
Reproducibility of hemodynamic measures (cardiac output, contractility, and afterload) and establishment of 95% confidence intervals for one-week hemodynamic variability.surrogate
Impedance cardiography measurements are reproducible at a one-week interval in stable heart failure outpatients, and stroke index may be a more reliable measure of patient status than cardiac output.
Cite This Study
Greenberg et al. (2000) conducted an observational in clinically stable heart failure (n=62). BioZ impedance cardiography was evaluated on reproducibility of hemodynamic measures (cardiac output, contractility, and afterload). BioZ impedance cardiography measurements were reproducible at a one-week interval and responsive to activity-rest changes in 62 outpatients with clinically stable heart failure.