英语语法分析

Objective: To investigate the clinical application value of transthoracic color ultrasonic cardiogram in typing of membranous tuberiform ventricular septal defect(VSD) before interventional occlusion.

目的：探讨经胸彩色超声心动图在膜部瘤形 室间隔缺损（VSD）介入治疗术前超声分型的临床应用价值。