超声心动图在主动脉瓣狭窄经导管主动脉瓣植入术中的应用价值

目的探讨超声心动图在主动脉瓣狭窄患者经导管主动脉瓣植入术中的作用。方法3例重度主动脉瓣瓣膜狭窄患者接受经导管主动脉瓣人工瓣膜植入术。使用PhilipS iE33型彩色多普勒超声诊断仪，配备经胸探头S5—1和经食道探头S7—2，X7—2t。超声观察内容包括明确主动脉瓣膜病变范围和程度，测量主动脉瓣环前后径，人工瓣膜植入术后瓣膜功能等。结果3例患者经导管主动脉瓣植入术均取得了成功，人工瓣膜位置稳定，常规超声心动图3例患者术前经胸超声心动图与术中经食管超声心动图诊断相符，跨瓣压差较术前明显下降，主动脉瓣瓣上流速明显下降，瓣周漏瞬时反流量平均约1．2mL。结论经导管主动脉瓣人工瓣膜植入术在治疗严重主动脉瓣瓣膜狭窄中方法可行，效果良好；超声心动图在这项工作中具有重要的辅助作用。

Evaluation of echocardiography in patients with aortic stenosis undergoing transcatheter aortic valve implantation

Objectives To explore the value of echocardiography in patients with aortic stenosis who underwent transcatheter aortic valve implantation(TAVI).Methods Three patients with serious aortic stenosis underwent TAVI.Philips iE33 color Doppler ultrasound diagnostic instrument was used,equipped with chest probe S5-1 and transesophageal probe S7-2,X7-2t.Aortic valve lesions area and degree,aortic valve size,artificial valve function after implantation were observed.Results TAVI for all the subjects succeeded.Artificial valve position was stable.Transthoracic echocardiography was consistent with transesophageal echocardiography.Pressure gradient and aortic velocity declined obviously,and paravalvular leaks regurgitation averaged at 1.2 mL.Conclusions TAVI may be feasible and effective for patients with serious aortic stenosis,in which echocardiography plays an auxiliary role.