Effect of lateral body position on transesophageal echocardiography images and the association with patient characteristics: A prospective observational study.
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Date
2015-07
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Abstract
Background: Changes in heart position are occasionally observed on the transesophageal
echocardiography (TEE) image screen after changing the body position from supine to lateral, although the
magnitude of change in cardiac position varies individually. We hypothesized that this variation is associated
with certain patient characteristics and evaluated how lateral positioning affects visualization of the heart
on TEE and whether the magnitude of change in the heart position correlates with patient characteristics.
Methods: Fifty‑three lung resection patients were enrolled. Two angle and two length parameters (ΔθTV, ΔθAP,
ΔLTV, and ΔLAP) were defined to describe location change of the lateral tricuspid annulus and right ventricular
apex on the TEE image between supine and lateral position. The correlation coefficients were calculated
between these four parameters and patient characteristics, including age, body mass index (BMI), epicardial
fat thickness, and pulmonary function variables. Results: The ΔθTV correlated positively and inversely
with BMI in both right and left lateral patients (right: r = 0.6365, P = 0.0034; left: r = −0.6616, P < 0.0001,
respectively). In left lateral patients, the ΔθTV correlated inversely with epicardial fat thickness (r = −0.4879,
P = 0.0182), and the ΔLAP correlated positively with the forced vital capacity percent predicted (r = 0.5736,
P = 0.0082). Conclusions: Lateral body positioning affects cardiac visualization on TEE, and the BMI,
epicardial fat thickness, and pulmonary function moderate this effect.
Description
Keywords
Body mass index, Body position, Heart position, Pulmonary function, Transesophageal
Citation
Mita Norikatsu, Kuroda Masataka, Saito Shigeru, Miyoshi Sohtaro. Effect of lateral body position on transesophageal echocardiography images and the association with patient characteristics: A prospective observational study. Annals of Cardiac Anaesthesia. 2015 Jul; 18(3): 299-305.