这张胸片怎么了？

前两天我在浏览BMJ时，发现了一个有趣的病例。先尝试自己阅读，点击每一段后的空白处显示本段落单词表（单词表可上下滑动）注：BMJ是英国的杂志，而某些单词的英美拼写并不相同，故在括号内标注了同一单词的美式拼写。A 92 year old man presented with recent onset of productive cough and fever up to 38.2°C.He had a history of atrial fibrillation and symptomatic tachycardia-bradycardia syndrome, for which he had undergone percutaneous implantation of a single chamber cardiac pacemaker six months earlier.Productive cough 排痰性咳嗽（咳痰）Atrial fibrillation 心房颤动Symptomatic 有症状的Tachycardia-bradycardia syndrome （心搏）快慢综合征Percutaneous 经皮的Implantation 移植，植入Single chamber cardiac pacemaker 单腔心脏起搏器At presentation he was afebrile and had ………………………………