de novo stenosis of the ostium (opening) of the right coronary artery
I the middle-aged male (A) was free of calcification. Directional atherectomy
using a 6 French device was successful (B).
Douglas, Jr., J.S., M.D., King, III, S.B., M.D., Techniques of Percutaneous Transluminal Angioplasty and Atherectomy of the Coronary Arteries, The Hurst's The Heart, 8th ed., p 1348. (modified)