Accuracy of intravascular ultrasound-derived virtual fractional flow reserve (FFR) and FFR derived from computed tomography for functional assessment of coronary artery disease.

"Declarations Ethics approval and consent to participateThis study was approved by the Ethics Review Committee of Zhejiang Hospital and conducted according to the principles of the Declaration of Helsinki. Since this clinical study was a retrospective analysis of the information from previous cases, without direct contact with the subjects and subject privacy protection was ensured, the risk borne by the subjects was not greater than the minimum risk. The  Ethics Review Committee of Zhejiang Hospital agreed to exempt informed consent after review. Consent for publicationNot applicable. Competing interestsThe authors have no competing interests to declare that are relevant to the content of this article. Competing interests The authors have no competing interests to declare that are relevant to the content of this article."

"Funding The present study was supported by the Major medical and health science and technology plan of Zhejiang Province (Grant No. WKJ-ZJ-1913), the Natural Science Foundation of Zhejiang Province (Grant No. LY21H020002), and CCA-China Youth Clinical Research Fund (Grant No. 2017-CCA-VG-024). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript."