Impedance cardiography is an important tool in determining a person's hemodynamic properties. The makers obtained through thoracic impedance have been shown to be of great importance when monitoring critical care patients. Technological developments have made this process noninvasive and ambulatory, opening up new possibilities for potential use. A study was conducted by remotely monitoring healthy subjects (n=5), who performed an 8-minute mild-to-moderate aerobic exercise protocol, followed up by a four minute cognitive stress test. Testing was conducted onsite at Kennedy Space Center in association with the National Aeronautics and Space Administration using the MW1000A (MindWare Technologies LTD, Gahanna, OH) ambulatory impedance cardiography monitoring (ICG) device. The current study was conducted in order to establish the test-retest reliability of the ICG during aerobic exercise and cognitive stress across a 2 week period. For the purpose of this study Heart Rate (HR), Left Ventricular Ejection Time (LVET) Stroke Volume (SV), Cardiac Output (CO), and Pre-Ejection Period (PEP) were acquired and analyzed during three phases. The phases were, walking on a level treadmill, walking at incline, and an at rest mental arithmetic stress test. Testing has shown that the MW1000A device can provide accurate ambulatory impedance cardiography monitoring with no significant difference between testing intervals. The simple application of electrodes makes this device easy to use and requires little training. Its non-invasive properties render employing ICG both a simple and effective means of determining the hemodynamic properties of a subject.
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Bachelor of Arts (B.A.)
Office of Undergraduate Studies
Dissertations, Academic -- Sciences;Sciences -- Dissertations, Academic
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Germain, Benjamin, "Test-retest reliability of noninvasive ambulatory impedance cardiography during aerobic exercise" (2012). HIM 1990-2015. 1268.