Figure 6 The decrease of the short axis radial strain firstly appeared in the left ventricular anterior wall, lateral wall and posterior wall, while the decrease of the short axis circumferential strain firstly appeared in the left ventricular anterior wall. (n=10) A: The short axis radial strain of ant. free wall. B: The short axis radial strain of lateral wall. C: The short axis radial strain of posterior wall. D: The short axis radial strain of inf. free wall. E: The short axis radial strain of post. septal wall. F: The short axis radial strain of anterior septum. G: The short axis circumferential strain of ant. free wall. H: The short axis circumferential strain of lateral wall. I: The short axis circumferential strain of posterior wall. J: The short axis circumferential strain of ant. base. K: The short axis circumferential strain of post. septal wall. L: The short axis circumferential strain of anterior septum. 5-FU + BEV group: 5-fluorouracil + bevacizumab group. *: P <0.05.
In the aspect of strain rate, the long axis radial strain rate of each segment of left ventricle was significantly different on the 7th day, slightly lower than that of the control group on the 14th day. The long axis longitudinal strain rate of left ventricle was slightly lower than that of the control group on the 14th day, in which the decrease of left ventricular apical segment was larger than that of the middle segment and basal segment, but there was no statistical difference (P >0.05). The short axis radial strain rate of left ventricular anterior wall, posterior wall, inferior wall and anterior interval was lower than that of the control group on the 14th day, but there was no significant difference in the left ventricular lateral wall and posterior septum. The short axis circumferential strain rate of each segment of the left ventricle decreased in different degrees on the 7th and 14th day, but there was no statistical difference (P >0.05). As figure 7 and 8.