Evaluation of left ventricular function in patients with coronary slow flow: A systematic review and meta-analysis.

"Conflict of interest: None declared"

"National Natural Science Foundation of China (grant numbers U21A20387 and 81871373); The Project from Department of Science and Technology of Liaoning Province (grant numbers 2021JH1/10400051); Liaoning Province “Xingliao Talents Plan” project (grant numbers XLYC1905001); and Shenyang Science and Technology Plan (grant numbers 20-205-4-014)."

"The systematic review and meta-analysis were performed adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and the Cochrane Handbook for Systematic Reviews of Interventions recommendations [, ]. The study was prospectively registered with the International Prospective Register of Systematic Reviews (https://www.crd.york.ac.uk/PROSPERO/) on February 12, 2022 (No: CRD42022300680)."