肺移植术后早期心脏结构和功能的变化

目的 分析肺移植术后早期心脏结构和功能变化,探讨其与患者术后肺动脉压力降低之间的关系。方法 回顾性分析2002-2010年无锡市人民医院行肺移植手术90例,术前及术后超声心动图资料完整者20例患者的临床资料。对比分析术前及术后超声心动图的变化。应用Pearson直线相关分析判断术后早期心脏结构及功能的变化与肺动脉收缩期压力下降之间的关系。结果 术后肺动脉收缩期压力(38.30±8.92)mmHg]较术前(60.05±29.10)mm Hg]明显降低(t=3.120,P=0.006);术后右心室内径较术前明显缩小(t =36.000,P=0.008);三尖瓣及肺动脉瓣返流程度明显减轻(t=57.000、t=66.000,P均＜0.05)。术后左心房内径、左心室舒张末期内径(35.15±5.73) mm和(43.25±5.56)mm]均较术前(32.40±7.29)mm和(40.15±6.20) mm]明显扩大(t=-2.384和t=-2.153,P均＜0.05)。虽然术后每搏输出量(59.54±14.97) ml)]较术前(44.18±15.85) ml]明显增加(t=-3.918,P=0.004),但术后左心室射血分数(63.10±8.48)％较术前(71.75±8.10)％明显下降(t =3.742,P=0.001)。Pearson直线相关分析可见肺移植术后肺动脉收缩压降低程度越大,术后左心房内径、左心室舒张末期内径增加幅度及术后左心室射血分数降低幅度越大(相关系数分别为0.642、0.737、0.448,P均＜0.05)。结论 肺移植术后早期右心结构正常化,右心功能改善,左心扩大,心搏出量增加,但左心室收缩功能降低,这些变化与肺动脉收缩期压力降低有一定关系。

Changes of cardiac structure and function in early stage after lung transplantation

Objective To analysis the changes of heart function in early stage after lung transplantation,and to explore its relationship with decreased pulmonary artery pressure.Methods From 2002 to 2010,echocardiography results of 90 patients before and after lung transplantation in Wuxi People's Hospital were collected, 20caseshadcompletedateofpreoperativeandpostoperative echocardiography.Echocardiographic changes had been analyzed.Pearson linear correlation analysis was applied to determine the relationship between the early postoperative changes in cardiac structure and function and decreased pulmonary artery systolic pressure.ResultsPostoperative pulmonary artery systolic pressure (38.30 ± 8.92]mm Hg) compared with preoperative(60.05 ± 29.10]mm Hg) was significantly lower(t =3.120, P = 0.006) , Postoperative right ventricular diameter was significantly reduced compared with the preoperative(t = 36.000, P = 0.008) , tricuspid and pulmonary valve regurgitation significantly reduced (t =57.000 and 66, Ps ＜ 0.05) .Postoperative left atrial diameter and left ventricular end diastolic diameter (35.15± 5.73]mm and 43.25 ± 5.56]mm) compared with preoperative(32.40 ± 7.29]mm and 40.15 ± 6.20]mm) were significantly expanded (t =-2.384 and t =-2.153, Ps ＜ 0.05) .Although postoperative stroke volume (59.54 ± 14.97]ml) compared with preoperative (44.18 ± 15.85]ml) significantly increased (t =-3.918, P = 0.004) , but the postoperative left ventricular ejection fraction (63.10 ± 8.48]％) compared with preoperative (71.75 ± 8.10]％) was significantly decreased (t =3.742, P = 0.001) .Pearson linear correlation analysis showed the greater degree of decreased systolic pulmonary artery pressure after lung transplantation, the larger rate of increased postoperative left atrial diameter and left ventricular end diastolic diameter, and the bigger range of decreased postoperative LVEF (r = 0.642,0.737 and 0.448, P ＜ 0.05) .Conclusion In early stage after lung transplant, right heart structure was normalization, right heart function improved,left heart enlarged, stroke volume increased, but left ventricular function reduced.There were a linear correlation between those changes and reduced systolic pulmonary artery pressure.