IMPEDANCE CARDIOGRAPHIES Meaning and
Definition
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Impedance cardiography is a non-invasive medical diagnostic technique used to assess the cardiovascular function of individuals. It involves measuring the impedance, or resistance to electrical flow, in the thorax (chest area) as a means of monitoring various parameters of heart function.
An impedance cardiography system typically consists of a series of electrodes placed on the skin surface of the patient's upper body. These electrodes emit a small, high-frequency electrical current through the tissues, creating an electrical field within the chest cavity. As blood flow and movement occur within this field, changes in the electrical impedance of the thorax can be detected and recorded.
Impedance cardiography provides valuable information regarding different cardiovascular parameters, including stroke volume (the amount of blood pumped by the heart in each beat), cardiac output (the total volume of blood pumped by the heart per minute), and the thoracic fluid index (a measure of fluid accumulation in the lungs). It can also assist in the diagnosis of certain cardiac conditions such as heart failure, as well as help monitor the effects of various interventions, such as medications or mechanical circulatory support devices.
The data obtained from impedance cardiography can be analyzed using specialized software to generate comprehensive reports and graphical representations of cardiovascular function. This information aids healthcare professionals in assessing cardiac function, guiding treatment decisions, and monitoring patient progress in a non-invasive manner.
Common Misspellings for IMPEDANCE CARDIOGRAPHIES
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Etymology of IMPEDANCE CARDIOGRAPHIES
The word "impedance cardiography" is derived from two main components: "impedance" and "cardiography".
1. Impedance: The term "impedance" refers to the total opposition that a circuit presents to the flow of an alternating current. It originated from the Latin word "impedire", meaning "to hinder" or "to restrict". In the context of physiology and medical instrumentation, impedance is used to measure the resistance of tissues to electrical currents.
2. Cardiography: The term "cardiography" is composed of two components, "cardio-" and "-graphy". "Cardio-" is derived from the Greek word "kardia", meaning "heart", while "-graphy" comes from the Greek word "graphein", meaning "to write" or "to record".
