A validation study of Left Ventricular contraction and relaxation model

This study modeled the Left Ventricular (LV) motion using parameters of myocardial twisting angle and shortening of LV long axis. Twenty two sets of the heart´s volume-time curve (VTC) were analyzed. The ejection fraction (EF) of each data set was evaluated. The average of EF was 70.96 ± 5.76%. The accuracy of model simulation was evaluated in each time frame. The average difference of volume between simulated LV and 4D cardio real images was 2.92 ± 3.09 (ml). The correlation of simulated LV volumes to the 4D real cardio images was 0.93. The average difference short axis radius of each time frame in the cardio cycle was 1.55 ± 0.47 (mm). This result has shown that the LV motion could be modeled using the function of shorten LV long axis and the function of the myocardial twisting angle.