Haemophilus parainfluenzae endocarditis with systemic embolisation following maxillary sinusitis

The authors present a case of a man with Haemophilus parainfluenzae endocarditis complicated with embolisation to the central nervous system. The patient had no evidence of endocarditis by transoesophageal and transthoracic echocardiograms at baseline, but shortly after developed large mitral valve vegetations with valve rupture. The case highlights how rapidly structural valve damage can ensue despite good clinical and laboratorial antibiotic response.