患者女,66岁。因发作性心悸6年,加重10d入院。临床诊断:阵发性心房颤动。为行导管消融术入我科。术前肺静脉CT检查:左心房受压、变形(主动脉根部压迫)(图1)。鉴于心房前后径减小,X线透视下房间隔穿刺困难,且术中并发症发生率高,决定应用心腔内三维超声指导心房颤动消融。调节超声导管位置显现卵圆窝最薄切面,随后向前推送穿刺鞘,心腔内超声显现为“帐篷征”时(图2)。此时 Female patient, 66 years old. Due to episodes of palpitations 6 years, increased 10d admission. Clinical diagnosis: paroxysmal atrial fibrillation. To line catheter ablation into my department. Preoperative pulmonary venous CT examination: left atrial compression, deformation (aortic root compression) (Figure 1). In view of atrial anterior and posterior diameter decreased, X-ray atrial septal puncture difficult, and the high incidence of intraoperative complications, the decision to use three-dimensional intracardiac echocardiography atrial fibrillation ablation. Adjust the position of the ultrasound catheter to show the thinnest section of the oval fossa, and then push the puncture sheath forward. The intracardiac ultrasound appears as “tent sign” (Figure 2). at this time