“…In recent years, there has been increasing interest in developing new diagnostic and prediction methods that could provide simple, accurate, fast, and inexpensive quantitative assessment of cardiac function to improve the ability to identify subclinical ventricular dysfunction in HT patients [ 18 , 19 ]. Because of its convenience and non-invasive nature, echocardiography is a particularly useful tool for assessing cardiac graft function [ 20 , 21 , 22 , 23 , 24 ]. However, considering the complexity of RV structure and contraction and the altered cardiac anatomy after HT, it is challenging to reveal subclinical cardiac impairment in HT patients by conventional echocardiography.…”