Association of preoperative retinal microcirculation and perioperative outcomes in patients undergoing congenital cardiac surgery.

"Declarations Ethics approval and consent to participateThis study was approved by the Research Ethics Committee of Guangdong Provincial People’s Hospital [No.GDREC2018148H(R1)]. Written informed consent was obtained from all study participants (or their parents or legal guardians, in the case of children under 16 years of age) prior to the study. Consent for publicationNot applicable. Competing interestsThe authors have no conflicts of interests to disclose. Competing interests The authors have no conflicts of interests to disclose."

"Funding This work was supported by National Natural Science Foundation of China (82271125), Project of Special Research on Cardiovascular Diseases (2020XXG007), Special Fund Project of Technology Achievement Transformation in Life and Health Innovation of the Greater Bay Area (GBALH202308), the launch fund of Guangdong Provincial People’s Hospital for NSFC (8217040449, 8227040339),  National Natural Science Foundation of China (82171075), the Science and Technology Program of Guangzhou (20220610092 and 202103000045), the Outstanding Young Talent Trainee Program of Guangdong Provincial People’s Hospital (KJ012019087), the GDPH Scientific Research Funds for Leading Medical Talents and Distinguished Young Scholars in Guangdong Province (KJ012019457), the Talent Introduction Fund of Guangdong Provincial People’s Hospital (Y012018145), the launch fund of Guangdong Provincial People’s Hospital for NSFC (8217040546)."