Preexisting heart disease was present in 662 patients admitted (42%), among whom 81% had congenital heart disease, 8% had prosthetic valve endocarditis, and 5% had rheumatic heart disease.

• 有662名患者(42%25)先前曾有心脏疾病，其中81%25的有先天性心脏病，8%25的有人工瓣膜性心内膜炎，5%25的有风湿性心脏病。