The HIC-4000I Impedance Cardiograph is a non-invasive instrument for detecting and monitoring bioelectric impedance cardiography signals including heart rate, stroke volume, cardiac output, basal thoracic impedance, rate of change of impedance, pre-ejection period, delta-Z, heart sounds, and respiratory rate. A separate unit (SunTech Tango+) is used in conjunction with this instrument to measure blood pressure.
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