Group B Streptococcus endocarditis with left ventricle-right atrium (Gerbode's) defect.

We report an unusual case of a 61-year-old woman with group B Streptococcus-positive infective endocarditis and a left ventricular-right atrium or Gerbode's defect. We discuss the issues surrounding such an infection and the implications of such a rare cardiac defect in our case report.