[Comment] Orbital atherectomy for severely calcified coronary artery lesions

Severely calcified coronary artery lesions are encountered increasingly frequently in clinical practice. The technical challenges faced by the interventional cardiologist in the treatment of these lesions are real and important.1,2 Because of the reduced vessel compliance that accompanies vascular calcification, delivery of equipment to, and expansion of, the target lesion is more challenging than for non-calcified lesions, with a resulting increase in the risk of adverse outcomes.3,4