实时三维超声检测离体猪心模拟室间隔缺损的方法学研究

Evaluation of detection methods for ventricular septal defect in pig hearts in vitro by real-time three-dimensional echocardiography

目的 探讨实时三维超声观测不同分型的室间隔缺损的最佳实时三维显示平面。方法 离体猪心 6只 ,造成干下型、膜周部及肌部三种不同分型的室间隔缺损 ,用耦合剂高压灌注后 ,以二维、双平面及三维超声的不同切面进行观察 ,通过半定量的显示评分量化 :4分 ,非常清晰 ;3分 ,清晰 ;2分 ,欠清晰 ,但可辨认 ;1分 ,不清晰。结果 实时三维超声观察干下型室间隔缺损时心室短轴剖视面 (S2a)与左心长轴正对室间隔剖视面 (L1a)为较为理想的剖视面 ,观察膜周部及肌部室间隔缺损时S2a与右心长轴正对室间隔剖视面 (L2a)为较为理想的剖视面。结论 S2a剖视面能够较为理想的显示干下型。

Objective To establish the optimal section planes for observing ventricular septal defect(VSD) by real-time three dimensional echocardiography(RT-3DE).Methods In 6 pig hearts with different types of VSD, after high pressural perfusion with coupling reagent, two dimensional, dual plane and RT-3DE were performed with different section planes, estimating with half quantificational visional grade:4 marks,very clear;3 marks,clear;2 marks,not clear enough; 1 marks,not clear. Results Observation by RT-3DE, en-face view of atrial-ventricular(S2a) and en-face view of left ventricular septum(L1a) provided relatively ideal section planes in sub-arterial ventricular septal defect, S2a and en-face view of right ventricular septum(L2a) provided relatively ideal section planes in perimembranous and muscular VSD. Conclusions S2a reflects relatively ideal section plane in sub-arterial, perimembranous and muscular VSD.