自动测量心搏出量改进法定量评价偏心性二尖瓣反流

Quantitative assessment of eccentric mitral regurgitation by modified ACOM

目的研究并证实自动心脏输出量测量法(ACOM)改进法定量评价二尖瓣偏心性反流。方法对19例患偏心性反流患者采用ACOM改进法,于收缩相对经二尖瓣反流瓣口的血流速度直接进行时间和空间双重积分,得到二尖瓣反流量,并将反流量作为评价参数,对患者的反流严重程度进行划分。最后,比较分析反流量与由实时三维彩色多普勒超声心动图测量得到的射流容积和反流狭径宽度之间的相关性。结果以反流量大小作为标准,3例患者被判定为轻度,10例患者被判定为中度,6例患者被判定为重度。ACOM改进法得到的反流量与射流容积(r=0.9371)和反流狭径宽度(r=0.8939)高度相关。结论ACOM改进法是对偏心性二尖瓣反流进行定量的有效方法。

Objective To investigate and validate a modified automatic cardiac output measurement （ACOM） method to quantify the eccentric mitral regurgitation （MR）. Methods By directly integrating the mitral regurgitant jet in space and in time during the systole, 19 patients with eccentric MR were examined by the modified ACOM, and the severity of the 19 patients using RV as evaluation parameter was graded. Finally, the RV was compared with the jet volume （JV） and vena contracta width （VCW） obtained by the real time three-dimensional echocardiography （RT-3DE）. Results Three patients were diagnosed as mild, 10 patients as moderate and 6 patients as severe using the RV as criterion. The RV obtained by modified ACOM correlated well with the reference data, JV （r=0. 9371） and VCW （r=0. 8939）, respectively. Conclusion The modified ACOM is a feasible method for quantifying eccentric MR.