Endovascular treatment of coronary steal.

Postoperative angina is generally caused by subclavian artery stenosis or flow diversion in anomalous or large unligated side branches of the left internal mammary artery. Previously, surgery was the treatment method for unligated side branches, but with the improvements of interventional techniques, it is shown that endovascular treatment is also effective in these patients. Herein, we present successful endovascular treatment of a large unligated intercostal side branch causing recurrent angina.