Participants
This prospective study included 93 patients with MR referred to our tertiary center to investigate the severity of MR from April 2022 to August 2022. The inclusion criteria were patients diagnosed with primary MR using the two-dimensional (2D) TEE without any concomitant valvular diseases at different severity without age restriction. Exclusion criteria are pregnancy, patients with intracardiac shunt, history of mitral valve surgery or replacement, and hypertrophic cardiomyopathy. The manuscript was written in accordance with the STROBE checklist (11).