摘要
目的：用应变率显像技术评价Carto标测系统引导下的环肺静脉消融术治疗心房颤动对近期左心房功能的影响。方法：30例因阵发性心房颤动行消融治疗的患者，于术前和术后1个月进行超声心动图检查，测量左房容积参数、左房射血力（LA-AEF）和左房各壁的收缩期峰值应变率（SRs）、舒张早期峰值应变率（SRe）及舒张晚期峰值应变率（SRa），评价左房机械功能的改变。结果：消融后LA-AEF和主动排空容积降低，左房最小容积和管道容积增加。左房各壁SRa降低，尤其后壁和侧壁；SRs和SRe在后壁和侧壁降低，前壁、下壁和房间隔增高，平均SRs和SRe较消融前无明显改变。LA-AEF与左房后壁SRa之间无相关性（r=0．39，P〉0．05），而与左房平均SRa存在较好的正相关关系（r=0.79，P〈0．001）。结论：Carto系统引导下的环肺静脉消融术对近期左房功能存在一定程度的不利影响。
Objective To evaluate the lately left atrial （LA） function by strain rate imaging after circumferential ablation of pulmonary vein ostia for atrial fibrillation guided by Carto mapping system. Methods Thirty patients who had ablation procedure for paroxysmal atrial fibrillation accepted echocardiography to estimate the LA mechanical function before and one month after ablation. The systolic strain rate（SRs）,early diastolic strain rate（SRe） and late diastolic strain rate（SRa） of each LA wall were measured,and the left atrial ejection force（LA-AEF） and volume indices,as well. Results One month post-ablation,the LA-AEF and LA active evacuation volume decreased, while the minimum volume and the conduit volume increased. SRa decreased significantly in each wall of LA, especially in posterior and lateral wall. SRs and SRe lowered in the posterior and lateral wall, but enhanced in anterior, inferior wall and septum of LA. Mean SRs and SRe had no statistical changes. There was no relationship between LA-AEF and SRa of posterior wall, but LA-AEF was well correlated with mean SRa positively. Conclusions The linear ablation guided by Carto mapping system did have some negative effects on lately LA mechanical function.
出处
《中华超声影像学杂志》
CSCD
2007年第6期470-473,共4页
Chinese Journal of Ultrasonography
关键词
超声心动描记术
心房颤动
导管消融术
心房功能
左
应变率显像
Echocardiography
Atrial fibrillation
Catheter ablation
Atrial function, left
Strain rate imaging
