ROVUS Asia Registry (Evaluate Safety and Effectiveness of Rotational Atherectomy and Intravascular Ultrasound for Heavily Calcified Coronary Lesion)

Inclusion Criteria: * Able to understand and sign an informed consent form * Presence of clinical indication for percutaneous coronary intervention (PCI) and/or stent placement * Subjects willing to comply with all research and follow-up requirements. * Angiographic criteria (ONE of the following criteria MUST be met) 1. Target lesions visually have at least moderate calcifications\* 2. Target lesion balloon dilatation failure 3. Inability of devices (microcatheters, balloons or stents) to pass through the target lesion. * Procedural criteria 1. All patients treated with RA with or without other forms of debulking therapy * Moderate calcification is defined as radio-opacities noted only during cardiac cycle prior to contrast injection whereas severe calcification is defined as radio-opacities seen without cardiac motion prior to contrast injection, usually affecting both sides of the arterial lumen. Exclusion Criteria: * Decline to give consent