Echocardiography is the most common diagnostic method for assessing atrial function but the technique has some limitations. Traditionally, assessment of left atrial function has been performed by measuring volumes wit...Echocardiography is the most common diagnostic method for assessing atrial function but the technique has some limitations. Traditionally, assessment of left atrial function has been performed by measuring volumes with 2D echocardiography. Additionally, it can be assessed with transmitral Doppler and pulmonary vein Doppler. Recently, an alternative method has been incorporated, namely, measurement of myocardial deformation with color tissue Doppler-derived strain. However, this method has several limitations, such as suboptimal reproducibility, angle-dependence, signal artifacts and the fact that it only measures regional strain and does not obtain information about the curved portion of the atrial roof. To overcome these limitations in the quantification of atrial function, the use of speckle tracking echocardiography (STE) strain has been proposed. This technique is not derived from Doppler but rather from 2D echocardiography; it is angle-independent and allows one to measure global as well as regional atrial strain. In this editorial, we describe the physical and pathophysiological concepts of STE and underline the clinical usefulness of this new technique.展开更多
目的探讨二维斑点追踪成像技术(2D-STI)评价经导管射频消融术(RFCA)前后阵发性房颤(AF)患者左心房功能的变化。方法对30例因阵发性AF接受RFCA治疗患者(AF组)分别于术前、术后3天、1个月及3个月行超声心动图检查,另选30名健康志愿者为对...目的探讨二维斑点追踪成像技术(2D-STI)评价经导管射频消融术(RFCA)前后阵发性房颤(AF)患者左心房功能的变化。方法对30例因阵发性AF接受RFCA治疗患者(AF组)分别于术前、术后3天、1个月及3个月行超声心动图检查,另选30名健康志愿者为对照组。常规测量左心房前后径(LAD)、二尖瓣舒张早期血流峰值流速(E峰)、二尖瓣环舒张早期速度(Em),计算E/Em;测量左心房收缩前容积(LAV P)、最小容积(LAV min)和最大容积(LAV max),计算左心房主动排空率(LAAEF)、左心房被动排空率(LAPEF);以2D-STI获得左心房各节段应变及应变率曲线,测量并计算左心室收缩期及左心室舒张早、晚期左心房平均峰值应变(mSs、mSe、mSa)、应变率(mSRs、mSRe、mSRa)以及左心房僵硬度(LASt)。比较RFCA前后阵发性AF患者左心房结构和功能的变化。结果与对照组比较,AF组术前LAD、LAV p 、LAV min 、LAV max 、E/Em、LASt增大,LAPEF、LAAEF、E、Em、mSs、mSe、mSa、mSRs、mSRe、mSRa减低(P均<0.05)。AF患者RFCA术前及术后3天、1个月、3个月左心房应变参数及LASt总体差异均有统计学意义(P均<0.05),术后3天mSs、mSe、mSa、mSRs、mSRe、mSRa较术前减低,LASt较术前增高(P均<0.05);术后3个月mSs、mSe、mSa、mSRs、mSRe、mSRa较术前增高,LASt较术前减低(P均<0.05);术后1个月、3个月mSs、mSe、mSa、mSRs、mSRe、mSRa较术后3天增高,LASt较术后3天减低(P均<0.05);术后3个月mSRs较术后1个月增高(P<0.05)。结论阵发性AF患者RFCA术后3天左心房功能下降,术后1个月辅泵功能有所改善,术后3个月左心房储备、辅泵、管道功能均明显改善。展开更多
文摘Echocardiography is the most common diagnostic method for assessing atrial function but the technique has some limitations. Traditionally, assessment of left atrial function has been performed by measuring volumes with 2D echocardiography. Additionally, it can be assessed with transmitral Doppler and pulmonary vein Doppler. Recently, an alternative method has been incorporated, namely, measurement of myocardial deformation with color tissue Doppler-derived strain. However, this method has several limitations, such as suboptimal reproducibility, angle-dependence, signal artifacts and the fact that it only measures regional strain and does not obtain information about the curved portion of the atrial roof. To overcome these limitations in the quantification of atrial function, the use of speckle tracking echocardiography (STE) strain has been proposed. This technique is not derived from Doppler but rather from 2D echocardiography; it is angle-independent and allows one to measure global as well as regional atrial strain. In this editorial, we describe the physical and pathophysiological concepts of STE and underline the clinical usefulness of this new technique.
文摘目的探讨二维斑点追踪成像技术(2D-STI)评价经导管射频消融术(RFCA)前后阵发性房颤(AF)患者左心房功能的变化。方法对30例因阵发性AF接受RFCA治疗患者(AF组)分别于术前、术后3天、1个月及3个月行超声心动图检查,另选30名健康志愿者为对照组。常规测量左心房前后径(LAD)、二尖瓣舒张早期血流峰值流速(E峰)、二尖瓣环舒张早期速度(Em),计算E/Em;测量左心房收缩前容积(LAV P)、最小容积(LAV min)和最大容积(LAV max),计算左心房主动排空率(LAAEF)、左心房被动排空率(LAPEF);以2D-STI获得左心房各节段应变及应变率曲线,测量并计算左心室收缩期及左心室舒张早、晚期左心房平均峰值应变(mSs、mSe、mSa)、应变率(mSRs、mSRe、mSRa)以及左心房僵硬度(LASt)。比较RFCA前后阵发性AF患者左心房结构和功能的变化。结果与对照组比较,AF组术前LAD、LAV p 、LAV min 、LAV max 、E/Em、LASt增大,LAPEF、LAAEF、E、Em、mSs、mSe、mSa、mSRs、mSRe、mSRa减低(P均<0.05)。AF患者RFCA术前及术后3天、1个月、3个月左心房应变参数及LASt总体差异均有统计学意义(P均<0.05),术后3天mSs、mSe、mSa、mSRs、mSRe、mSRa较术前减低,LASt较术前增高(P均<0.05);术后3个月mSs、mSe、mSa、mSRs、mSRe、mSRa较术前增高,LASt较术前减低(P均<0.05);术后1个月、3个月mSs、mSe、mSa、mSRs、mSRe、mSRa较术后3天增高,LASt较术后3天减低(P均<0.05);术后3个月mSRs较术后1个月增高(P<0.05)。结论阵发性AF患者RFCA术后3天左心房功能下降,术后1个月辅泵功能有所改善,术后3个月左心房储备、辅泵、管道功能均明显改善。
