In the rotablator procedure, a catheter is introduced and advanced to the coronary artery over the guide wire cross the stenosis inside the coronary artery. The drill head is used to remove plaque deposits. The guide wire is used to advance a balloon and/or a stent to the site of the stenosis. This rotablator technique is especially useful in patients who have lot of calcium deposited in their heart artery blockages as these calcified blockages are unable to open with plain balloon. Removing calcium from the blockages also helps in positioning and deploying the stent appropriately.