Chapter 12: THE CHEST ROENTGENOGRAM AND CARDIAC FLUOROSCOPY COMPARISON
To appreciate the acuteness or chronicity of the disease or its response to therapy, one must carefully compare serial roentgenograms. As demonstrated in Fig. 12-7B, the heart may be considered neither enlarged nor failing if the baseline study made 3 years earlier in Fig. 12
7 A were not available for comparison (see "Heart Failure," below). Similarly, an enlarging heart with normal pulmonary vascularity is highly suggestive of pericardial effusion. Conversely, a shrinking heart in the presence of normal vascularity is compatible with resolution of a pericardial effusion (Fig. 12-20).
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