Percutaneous transluminal angioplasty of a large septal artery.

A severely stenotic, large-caliber, first septal artery was successfully dilated in a patient with refractory angina and nonsurgical, multivessel coronary artery disease. The success of this dilatation was related to favorable coronary anatomy and to the availability of a guidewire-directed dilatation catheter. Septal artery stenosis with or without surgically accessible stenoses in other coronary vessels represents a potential indication for percutaneous transluminal coronary angioplasty.