Dr. Seung Hun Lee received an institutional research grant from Abbott Vascular Dr. Akiko Maehara has been a consultant for Boston Scientific, advisory board member for SpectraWave, and speaker honoraria by Nipro. Dr. Evan Shlofmitz has been a consultant to Abbott Vascular, Medtronic, and Opsens Medical. Dr. Gregg W. Stone has received speaker honoraria from Medtronic, Pulnovo, Infraredx, Abiomed, Amgen, Boehringer Ingelheim; has served as a consultant to Abbott, Daiichi Sankyo, Ablative Solutions, CorFlow, Cardiomech, Robocath, Miracor, Vectorious, Apollo Therapeutics, Elucid Bio, Valfix, TherOx, HeartFlow, Neovasc, Ancora, Occlutech, Impulse Dynamics, Adona Medical, Millennia Biopharma, Oxitope, Cardiac Success, HighLife, Elixir, Remote Cardiac Enablement, Aria; and has equity/options from Ancora, Cagent, Applied Therapeutics, Biostar family of funds, SpectraWave, Orchestra Biomed, Aria, Cardiac Success, Valfix, Xenter. Dr. Stone?s employer, Mount Sinai Hospital, receives research grants from Abbott, Abiomed, Bioventrix, Cardiovascular Systems Inc, Phillips, Biosense-Webster, Shockwave, Vascular Dynamics, Pulnovo, V-wave. Dr. Jeremias has received institutional grants and consulting fees from Abbott Vascular and Philips/Volcano; and has received consultant fees from ACIST and Boston Scientific. Dr. Richard A. Shlofmitz has been a speaker for Shockwave Medical. Dr. Joo Myung Lee received institutional research grants from Abbott Vascular, Boston Scientific, Philips Volcano, Terumo Corporation, Zoll Medical, Donga-ST, Korean Society of Interventional Cardiology, and Yuhan Pharmaceutical. Prof. Joo-Yong Hahn received an institutional research grants from National Evidence-based Healthcare Collaborating Agency, Ministry of Health & Welfare, Korea, Abbott Vascular, Biosensors, Boston Scientific, Daiichi Sankyo, Donga-ST, Hanmi Pharmaceutical, and Medtronic Inc. Dr. Ziad A. Ali reports institutional grants from Abbott, Abiomed, Acist Medical, Boston Scientific, Cardiovascular Systems Inc, Medtronic, Opsens Medical, Philips, Shockwave Medical; personal fees from Amgen, Astra Zeneca, Boston Scientific; equity from Elucid, Lifelink, Spectrawave, Shockwave and Vital Connect. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.