Context: Tetralogy of Fallot (TOF) is one of the most important congenital heart diseases that its prognosis can be improved by surgery. However, Right Ventricular (RV) function may be disrupted because of pulmonary regurgitation and other preoperative and intraoperative factors. Access to a simple and reproducible diagnostic index of RV function is important. Echocardiographic index of Right Ventricular Myocardial Performance (RVMPI) has been used as a simple and noninvasive method for the assessment of RV function. 
Evidence Acquisition: This article review was conducted utilizing PubMed, Web of Science, Scopus and Google Scholar databases with the keywords of “Right Ventricle (RV)”, “Myocardial Performance Index (MPI)”, and “Tetralogy of Fallot (TOF) repair or correction”.
Results: RVMPI as a non-geometric echocardiographic index was compared with other echocardiographic indices, QRS duration in ECG, Cardiac Magnetic Resonance (CMR) findings, and exercise capacity in the pediatric and adult studies.
Conclusions: This narrative review suggested that RVMPI, especially the tissue Doppler-derived has been used as a useful index of RV function in the follow-up of the repaired TOF patients. However, more research, including systematic reviews are necessary to determine the potential implication of RVMPI in the assessment of RV dysfunction.