Acute left ventricular failure

This plain frontal radiograph of the chest of a 30-year-old male demonstrates bilateral perihilar alveolar edema, giving a typical butterfly appearance, with bilateral interstitial edema and pulmonary venous redistribution to the upper lobes. The acute nature of this condition is manifest by the absence of pleural effusions or an enlarged cardiac silhouette.

Posteroanterior view of a normal chest radiograph.