<num>) increased opacification of the left lower lobe is most likely a small left-sided pleural effusion with associated atelectasis in this postoperative patient. <num>) stable small right-sided pleural effusion with associated atelectasis. <num>) increased size of enlarged cardiac silhouette over multiple priors and when compared to baseline raises the possibility of pericardial effusion. findings were communicated by dr. <unk> to <unk> of cardiac surgery by phone at <time>pm on <unk>.