Single coronary ostium in right coronary sinus: previously unreported "one for all" configuration.

We report our identification of a single coronary ostium arising from the right coronary sinus of Valsalva, in a 63-year-old woman who presented with chest pain atypical of angina. Coronary angiograms showed that the left anterior descending coronary artery arose from a right ventricular branch and that the left circumflex coronary artery arose from a right posterolateral branch. Both arteries reconstituted themselves in a backward fashion from the apex to the base of the heart-a configuration that to our knowledge has not been reported. The patient was treated conservatively and reported no chest pain 24 months later.