Aborted Sudden Cardiac Death After Unroofing of Anomalous Left Coronary Artery.

We describe a patient with anomalous left coronary artery with a short intramural course and a previously unrecognized myocardial bridge who presented with a recurrent episode of aborted sudden cardiac death. Intravascular ultrasound and fractional flow reserve showed significant compression at the left coronary artery ostium by the intercoronary pillar and at the myocardial bridge. Intravascular ultrasound and fractional flow reserve were normal after coronary translocation and unroofing of the myocardial bridge. All potential anatomic culprits should be addressed when operating on patients with anomalous coronaries.