Intravascular Ultrasound Findings Associated With Hydrodynamic Contrast Recanalization (HDR) of Coronary Chronic Total Occlusions

HDR is a novel CTO PCI technique that appears to facilitate intraplaque wire crossing without causing significant vessel injury. The presence of speckled plaque by IVUS is a unique feature of HDR that may suggest a mechanism underlying this technique. Additional studies are needed to confirm these findings.