CSI Diamondback 360 operates with a crown speed of approximately how many rpm?

• A. 130,000 rpm
• B. 50,000 rpm
• C. 10,000 rpm
• D. 200,000 rpm

Answer: (A)

High-speed rotation of the device’s crown is what enables effective sanding of calcified plaque in rotational atherectomy. The Diamondback 360 operates at a crown speed of about 130,000 rpm, a speed chosen to efficiently abrade hard calcium while allowing the catheter to be delivered through the vessel. Among the options, 130,000 rpm best matches the device’s typical operational speed; speeds much lower would be insufficient to abrade calcium effectively, while speeds that are too high are not characteristic of this crown design. This high rpm is a defining feature that differentiates it from slower techniques and helps explain why the device is effective in heavily calcified lesions.