Clinical physiology and functional imaging
-
Clin Physiol Funct Imaging · Nov 2008
Comparative StudyComparison of different views with three-dimensional echocardiography: apical views offer superior visualization compared with parasternal and subcostal views.
Studies seeking to validate real-time three-dimensional echocardiography (3DE) with regard to cardiac function and dimensions have almost exclusively used apical views. However, it has never been examined whether apical views are preferable to parasternal or subcostal views. In the present study, we compared the feasibility of 3DE volumetric measurements of the four heart chambers in three different views. ⋯ Visualization of the right atrium was adequate in 31 (78%) patients, whereas the right ventricle was adequately visualized in only 12 (30%) patients. The apical view of 3DE provided superior visualization of all four heart chambers compared with the parasternal and subcostal views, when applying a slight off-axis approach for both ventricles when needed. Thus, in the present study, there was no incremental value of assessment of chamber volumes in the parasternal and subcostal views.
-
Clin Physiol Funct Imaging · Nov 2008
Does a solitary lobar collapse give pressure-lung volume relationship similar to that found in acute respiratory distress syndrome? A porcine experimental study.
The underlying pathophysiology causing different shapes of static pressure-lung volume (PV) curves is not fully elucidated. In this study the aim was to examine the influence of a solitary lobar collapse on inflation-deflation PV curves. The hypothesis was that a lobar collapse would induce the same changes in the PV-curve as those found in experimental acute lung injury (ALI) and in acute respiratory distress syndrome (ARDS). ⋯ PV curves of lungs with solitary lobar collapse are similar to those found in ALI/ARDS. Inspiratory LIP indicated start of recruitment, and expiratory curves did not indicate the pressure at which collapse occurred.