Figure 1.
Figure shows a schematic representation of the CT image parameters analyzed.
Panel A shows rib cage dimensions (numbered white arrows), cardiac silhouette (continuous white line contour) and lung boundaries (dotted white line contours) on a representative CT section located 1 cm above the diaphragm. Numbers 1 and 2 identify right and left anteroposterior sagittal distances, number 3 the maximal thoracic transverse distance, number 4 the sternovertebral distance and number 5 the cardiac transverse diameter (dashed line). Panel B shows a schematic representation of the orthogonal pressure (black arrows) exerted by the left (LCP) and right (RCP) cardiac protrusions (white cardiac segments) on subjacent surface (tipped black solid lines) of lower lobes located beneath the heart (white lung areas). Parts of lower lobes located outside of heart limits are represented in gray.
Table 1.
Individual characteristics of the patients undergoing Coronary Artery Bypass Graft with Cardiopulmonary Bypass.
Table 2.
Hemodynamic and metabolic profiles during surgery and in the first 24 postoperative hours.
Figure 2.
Right and left sagittal distances (panels A and B), maximal thoracic transverse distance (panel C) and sternovertebral distance (panel D) measured on 6 CT sections before (open circles) and after surgery (closed circles).
Data are expressed as mean ± SEM.
Figure 3.
Cephalocaudal dimensions of the lungs (distance from pulmonary apex to the diaphragmatic cupola) measured on 6 CT sections before (open bars) and after surgery (black bars).
Data are expressed as mean ± SEM.
Figure 4.
Maximal transverse cardiac distance (panel A), left cardiac protrusion (panel B) and right cardiac protrusion (panel C) measured on 3 CT sections before (open circles) and after surgery (closed circles).
Data are expressed as mean ± SEM.
Figure 5.
Overall heart, right cardiac protrusion and left cardiac protrusion masses computed before (open bars) and after surgery (black bars).
Data are expressed as mean ± SEM.
Table 3.
Overall gas and tissue volumes and mass of right and left lungs measured on the CT section located 1 cm above the diaphragm.
Figure 6.
Pressure exerted by the right and left cardiac protrusion masses on subjacent lower lobes measured before (open bars) and after surgery (black bars).
Data are expressed as mean ± SEM.
Table 4.
Overall, gas and tissue volumes and mass of right lower lobe segments below and outside of the heart limits measured on the CT section located 1 cm above the diaphragm.
Table 5.
Overall gas and tissue volumes and mass of left lower lobe segments below and outside of the heart limits measured on the CT section located 1 cm above the diaphragm.
Figure 7.
Fraction of non-aerated to overall parenchyma mass of right and left lower lobe segments located beneath the heart and outside of the heart limits before (open box-plots) and after surgery (gray box-plots).
The bottom and top of the box are the lower and upper quartiles, respectively and the horizontal line within the box is the median. The whiskers represent 1.5 times the quartiles according to Tukey method.