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  • Instruments designed to measure the volume and flow rate of blood pumped by the heart. The measurements are typically displayed on the device in terms of liters and liters per minute respectively. These instruments typically include an electronic computerized unit, generators (e.g., radiofrequency, ultrasound), controls, a display, and appropriate sensors. Cardiac output is a vital indicator of overall cardiac status and the quality of tissue perfusion. There are several methods of measuring cardiac output, including thermal, impedance, radioisotope, dye dilution, and ultrasonic techniques.
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