Journal of cardiothoracic and vascular anesthesia
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J. Cardiothorac. Vasc. Anesth.
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J. Cardiothorac. Vasc. Anesth. · Aug 2004
Determination of preload-recruitable stroke work and elastance by the relationship of arterial blood flow velocity to left ventricular area.
The authors investigated the feasibility of an online sampling and display of LV flow-area loops for the determination of LV elastance and preload-recruitable stroke work (PRSW). Automated LV area measurements by echocardiography may be combined with flow velocity measurements in the internal carotid artery to construct LV flow-area loops as estimates of the systolic pressure-volume relationship. ⋯ Indices of the LV pressure-area relationship can be derived from real-time loops constructed from arterial flow velocity and LV area.