• Nicole Ribeiro Marques, Caroline Martinello, George C Kramer, Maged M Costantine, Rakesh B Vadhera, George R Saade, Gary D Hankins, and Luis D Pacheco.
• Department of Anesthesiology, The University of Texas Medical Branch, Galveston, Texas.
• Am J Perinatol. 2015 Mar 1;32(4):393-8.

ObjectiveTo determine if passive leg raising (PLR) significantly increases cardiac output in a cohort of healthy pregnant women during the third trimester.Study DesignUsing a noninvasive monitor, baseline hemodynamic measurements for arterial blood pressure, systolic and diastolic blood pressure, heart rate, cardiac output, cardiac index, stroke volume, and systemic vascular resistances were obtained with patients in the semirecumbent position. Measurements were repeated after a 3-minute PLR maneuver in supine, right lateral decubitus, and left lateral decubitus positions.ResultsAfter 10 minutes of bed rest, the cohort's mean baseline heart rate was 80 ± 12 beats/minute. Baseline stroke volume was 98 ± 14 mL, mean cardiac output was 7.8 ± 1.2 L/min, and mean cardiac index was 4.32 ± 0.63 L/min. The baseline systemic vascular resistance value was 893 ± 160 dynes/sec/cm(5). Baseline mean arterial blood pressure was 84 ± 11 mm Hg. Following a PLR maneuver in the supine position, heart rate decreased significantly. No difference was noted in other measurements. Findings were similar with PLR in the left lateral decubitus. PLR in the right lateral decubitus resulted in significantly decreased heart rate, cardiac output, and cardiac index.ConclusionsPLR did not result in cardiac output recruitment in a cohort of healthy pregnant women during the third trimester.Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

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