BackgroundSurgical correction of Tetralogy of Fallots (ToF) involves relieving right ventricular outflow tract (RVOT) obstruction. During long-term follow up, these procedures result in pulmonary regurgitation (PR) which may cause deterioration of right ventricle function. Cardiac Magnetic Resonance (CMR) is the gold standard to evaluate the severity of PR in repaired ToF patients, yet it is not widely available. Meanwhile echocardiographic pressure half time (PHT) is a simple modality, with inconsistent diagnostic accuracy among studies. We aimed to evaluate the diagnostic performance of PHT in assessing PR.MethodsThe protocol pertaining for this systematic review and meta-analysis has been registered in PROSPERO (CRD42023411911). A systematic search of literature was performed through PubMed, EMBASE, Cochrane Library, Scopus, ScienceDirect, and ProQuest for articles published from inception …