经导管房间隔缺损封堵术后心脏形态大小变化的随访研究

目的评价房间隔缺损(ASD)患者经导管ASD封堵术后及随访中心脏形态和大小的变化。方法应用超声心动图分别测量36例ASD患者经导管ASD封堵治疗术前、术后3 d、术后3月和术后6月右室舒张末期前后径(RVEDD)、右房长径(RAD1)右房横径(RADt)、左室舒张末期前后径(LVEDD)、左室舒张末期容积(LVEDV)和左房前后径(LAD)。结果ASD封堵术后3 d及术后3月,RVEDD、RAD1、RAD t逐渐缩小;LVEDD、LVEDV和LAD逐渐增大。术后6月随访时,RVEDD继续缩小,LVEDD和LVEDV继续增大,RAD1、RADt和LAD无进一步变化。结论ASD封堵术治疗既减轻了右心容量负荷,使右房、右室内径缩小,也改善了左心的几何构型,使已经缩小的左房、左室逐渐增大恢复。

Changes of the cardiac morphology and size after transcatheter closure of atrial septal defect

Objective To evaluate the changes of the right atrium,right ventriculum,left atrium and left ventriculum after transcatheter closure of atrial septal defect(ASD) during a short to mid-term follow-up.Methods The right ventricular end-diastolic anterior-posterior diameter(RVEDD),right atrial long diameter(RADl),right atrial transverse diameter(RADt),left ventricular end-diastolic ante-posterior diameter(LVEDD),left ventricular end-diastolic volume(LVEDV) and left atrial anterior-posterior diameter(LAD) in 36 patients with secundum ASD were measured before ASD closure,after 3 days,3 months and 6 months of ASD closure with transthoracic echocardiography(TTE).Results RVEDD,RADl and RADt were significantly decreased,while LVEDD,LVEDV and LAD significantly increased 3 days after ASD closure.During 3 months follow-up,RVEDD,RADl and RADt continuously became smaller;LVEDD,LVEDV and LAD continuously became larger.At 6 months,RVEDD was significantly smaller and LVEDD,LVEDV were significantly larger than those at 3 months.No remarkable difference of RADl,RADt and LAD was found between 6 months and 3months follow-up.Conclusion Transcatheter closure of ASD not only decreases the preload of right heart and causes right atrium and right ventriculum become smaller,but also improves the geometry of left heart and causes the narrowed left atrium and left ventriculum gradually return to almost normal status.