Anatomic M-mode echocardiography: A new approach to assess regional myocardial function - A comparative in vivo and in vitro study of both fundamental and second harmonic imaging modes
Anatomic M-mode echocardiography: A new approach to assess regional myocardial function - A comparative in vivo and in vitro study of both fundamental and second harmonic imaging modes
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DOI：
10.1016/s0894-7317(99)70050-7
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发表时间：
1999-05-01
影响因子：
6.5
通讯作者：
Sutherland, GR
中科院分区：
文献类型：
--
作者：
Strotmann, JM;Kvitting, JPE;Sutherland, GR
目的：评价解剖m型超声心动图（AMM）的准确性。方法：在烧杯中以不同的光照深度（IDs）在装置上旋转8个幽灵。分别用不同频率的换能器进行基频成像（FI）和次谐波成像（SHI），并采用常规m型超声心动图（CMM）和旋转后应用角度校正（AC）的超声心动图（AMM）评估其直径。此外，用CMM和AMM测量了10例FI和SHI患者的左室壁尺寸。结果：AC对AMM测量误差影响最大，其次是ID （AC: R-2 = 0.295, ID: R-2 = 0.268, P < 0.0001）。SHI提高了精度，当交流角达到60度时，CMM和AMM之间不再存在差异。在体内，在SHI中，AMM和CMM之间的一致极限为-1.7至+1.8 mm。结论：在其局限性内（AC < 60度，ID < 20厘米），AMM可以作为临床实践的有力工具。
Objective: To evaluate the accuracy of anatomic M-mode echocardiography (AMM).Methods: Eight phantoms were rotated on a device at different insonation depths (IDs) in a water beaker. They were insonated with different transducer frequencies in fundamental imaging (FI) and second harmonic imaging (SHI), and the diameters were assessed with conventional M-mode echocardiography (CMM) and AMM with the applied angle correction (AC) after rotation. In addition left ventricular wall dimensions were measured with CMM and AMM in FI and SHI in 10 volunteers.Results: AC had the greatest effect on the measurement error in AMM followed by ID (AC: R-2 = 0.295, ID: R-2 = 0.268; P < .0001). SHI improved the accuracy, and a difference no longer existed between CMM and AMM with an AC up to 60 degrees. In vivo the limit of agreement between AMM and CMM was -1.7 to +1.8 mm in SHI.Conclusion: Within its limitations (AC < 60 degrees; ID < 20 cm), AMM could be a robust tool in clinical practice.