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- W1972608743 abstract "Objectives. This study attempted to evaluate the effects of supine and lateral recumbent positions on pulmonary venous flow by transesophageal Doppler echocardiography in healthy subjects.Background. Although transesophageal echocardiographic examination is usually performed with the patient lying in the left lateral decubitus or supine position, little attention has been paid to the effects of these positions on pulmonary venous flow.Methods. We performed pulsed Doppler transesophageal echocardiography of the left and right pulmonary veins in 16 normal subjects as they lay in the left and right lateral decubitus and supine positions.Results. Data are reported as mean value ± SD. Adequate recordings were obtained in 12 subjects (75%). In the left pulmonary vein, peak systolic velocity and time-velocity integral of systolic flow increased significantly in the left compared with the right lateral decubitus position (56 ± 12 vs. 44 ± 13 cm/s, p < 0.05, and 15 ± 4 vs. 9 ± 4 cm, p < 0.05, respectively). In the right pulmonary vein, peak systolic velocity and time-velocity integral of systolic flow decreased significantly in the left compared with the right lateral decubitus position (38 ± 10 vs. 48 ± 9 cm/s, p < 0.05, and 9 ± 2 vs. 12 ± 2 cm, p < 0.05, respectively). There were no significant differences between positions in peak diastolic flow velocity, time-velocity integral of diastolic flow or peak velocity of flow reversal at atrial contraction.Conclusions. Pulmonary venous systolic peak velocities and time-velocity integrals of systolic flow Increase when the pulmonary venous recording is from the recumbent subject's lower side. Therefore, the effects of position should be considered in evaluating left ventricular diastolic function by transesophageal Doppler echocardiography." @default.
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- W1972608743 date "1993-02-01" @default.
- W1972608743 modified "2023-10-18" @default.
- W1972608743 title "Transesophageal echocardiographic imaging in the right lateral decubitus position is comparable to the conventional left lateral decubitus position" @default.
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- W1972608743 doi "https://doi.org/10.1016/0002-8703(93)90047-d" @default.
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