Double balloon angioplasty for unstentable large-caliber right coronary stenosis.

: Despite newer lower-profile stent technologies, placing coronary stents may still remain challenging when vessels are extremely tortuous. We describe a case of a tortuous, very largecaliber right coronary with a near-180 degrees switchback "shepherd's crook" turn, which could not be stented, and for which double balloon angioplasty was successfully performed.