Objectives Transcatheter aortic valve implantation (TAVI) is a new medical technology developed in recent years. It solves the problem of high operation risk of aortic valve stenosis undergoing thoracotomy replacement, its feasibility being worthy of praise, but its necessity requires some time and data of inspection.the new ultrasound technique. Three-dimensional speckle tracking imaging (3DSTI) can evaluate left ventricular systolic function change before and after TAVI.
Methods 16 patients with severe aortic stenosis have TAVI-surgery in our hospital. The teal-time 3D full volume datasets on apical four-chamber view were obtained on baseline and 7 days after operation. Peak long strain, radial strain and circumferential strain in 16 segmengts of left ventricular circular level (B), papillary muscle level (M) and apical level (A) of preoperative and postoperative were measured by 3DSTI. The results were compared.
Results 1. the LVEF of preoperative were lower than those of postoperative (p < 0.05). 2. the globe peak strain of preoperative on anterior of B level, lateral, posterior, inferior wall of M level were lower than postoperative imagings measured by 3DSTI (all p<0.05), there was no significant difference of the rest 12 segements; PLS of preoperative imagings on posterior of B level, anterior, lateral of M level, four segments on A level all significant lower than those of postoperative (all p < 0.05); PRS on posterior of B level, posterior, inferior of M level, lateral, inferior wall of A level and PCS on laterior, inferior of M level, inferior of A level were lower than those data measured by 3DSTI after TAVI operation (all p < 0.05), the rest segments have no significant.
Conclusions Significant growth can be found in LVEF; improvment in myocardial longitudinal systolic fuction are most obvious; the circumferential, radial strain did not change much. Short-term results from cardiac ultrasound speckle tracking, quality of life after Tavi on the patients was improved.