There is mild cardiomegaly with right atrial and right ventricular wires in place. There is diffuse homogeneous increased hepatoparenchymal radiodensity without evidence of focal lesions or intrahepatic biliary duct dilatation noted. There is a focal, approximately 5 mm low density structure in the gallbladder suggestive of a gallstone. Amiodarone is an antiarrhythmic drug used for supraventricular and ventricular arrhythmias. It has significant side effects, the most notable being pulmonary fibrosis.
Pulmonary fibrosis causes a cystic appearance, or honeycombing, within the lungs.
There is often associated septal and pleural thickening and high density pleuroparenchymal plaques near the lung bases. In addition, there may be increased liver density without a marked change in splenic attenuation due to accumulation of the drug, which contains iodine, within the hepatocytes.