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Electrical cardiometry is a method based on the model of ''Electrical Velocimetry'', and non-invasively measures stroke volume (SV), cardiac output (CO), and other hemodynamic parameters through the use of 4 surface ECG electrodes. Electrical cardiometry is a method trademarked by Cardiotronic, Inc., and is U.S. FDA approved for use on adults, children, and neonates.〔U.S. 510K #K082242〕 ==Overview== * The method of electrical cardiometry requires the use of 4 ECG electrodes, 2 attached to the left side of the neck and 2 attached at the lower thorax.〔 * An electrical alternating current (AC) of constant amplitude is applied via the pair of outer electrodes toward the thorax and in particular the ascending and descending aorta. * Current is directed toward the aorta because blood is the most conductive material in the thorax. * The ratio of applied current and measured voltage equals the conductivity (or bioimpedance), which is recorded over time.〔http://cardiotronic.net/en/products/cardiac_output_monitors/bottom.htm〕 * The steep increase in conductivity seen beat to beat is attributed to the orientation of red blood cells. The time when the slope is most steep is directly related to the peak aortic blood acceleration. * Electrical cardiometry is similar to impedance cardiography in the fact that both methods measure thoracic electrical bioimpedance (TEB). The methods differ from what phenomenon is responsible for the steep increase in TEB per heart beat. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Electrical cardiometry」の詳細全文を読む スポンサード リンク
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