What is the role of chest radiography in the workup of dilated cardiomyopathy?

Updated: Nov 28, 2018
  • Author: Vinh Q Nguyen, MD, FACC; Chief Editor: Gyanendra K Sharma, MD, FACC, FASE  more...
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Answer

Assess for enlargement and configuration of the cardiac silhouette. A study investigating the specificity and sensitivity of physical and laboratory findings in patients with dyspnea in the emergency department (ED) suggests that cardiomegaly is one of the most sensitive and specific signs in diagnosing cardiomyopathies. The absence of cardiomegaly on chest radiographs decreases the likelihood of heart failure. Remember that patients with left ventricular hypertrophy and pericardial effusion can also present with an enlarged cardiac silhouette.

Pulmonary vascular congestion may be observed. Hilar vessels may appear more concave, with prominent vasculature of the upper lung fields. Kerley B lines may be present. Pleural effusion usually occurs first on the right side, but it can be bilateral. Abnormal calcifications may be valvular, atherosclerotic, or pericardial in nature. Congenital malformations may be noted. The presence of pulmonary vascular congestion and interstitial edema on chest radiograph increases the likelihood of acute decompensated heart failure about 12-fold.


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