CAlcified Lesion Intervention Planning Steered by OCT.

Inclusion Criteria

• •1. Patient with chronic coronary syndrome
• •2. Angiographically moderately to severely calcified target lesion, defined as follows:
• •* Moderate: lesion with radio-opacities noted only during the cardiac cycle before contrast dye injection (Aksoy et al., Circ Cardiovasc Interv 2019)
• •* Severe: lesion with radio-opacities seen without cardiac motion before contrast dye injection, visible on both sides of the arterial lumen(Aksoy et al., Circ Cardiovasc Interv 2019)
• •3. Possibility to cross the target lesion with OCT catheter