Author + information
- Xiao Zhou,
- Guang Zhi,
- Zhen Qian,
- Shizhen Liu,
- Wang Yang,
- Liquan Cheng,
- Ye Wang,
- Helene Houle,
- Paaladinesh Thavendiranathan,
- Randolph Martin and
- Mani Vannan
We compared the accuracy of real-time automated algorithm to measure 3-D voxel myocardial mechanics compared to tagged and feature tracking CMR (tagged-CMR and FT-CMR).
Data from normals (n=10) and DCM (n=10) patients who underwent real-time volume trans-thoracic echocardiography (RT-VTTE) of LV (20-33 vol/sec) were compared to CMR data. Average apical circumferential strain (CS,%), and rotation was measured automatically from RT-VTTE. This was compared to measurements made by HARP-tagged CMR (tagged-CMR) and velocity vector imaging applied to cine-CMR (FT-CMR). Global 3-D longitudinal strain (LS,%) by RT-VTTE was compared to FT-CMR.
In the 20 patients, 3-D CS by RT-VTTE showed good correlation with tagged-CMR (r=0.81, p<0.001) and FT-CMR (r= 0.84, p=<0.001), respectively. The mean difference between RT-VTTE CS and tagged-CMR and FT-CMR was 11 % and 0.9%, respectively. Apical rotation by RT-VTTE correlated weakly with tagged-CMR (r=0.43, p=0.08, mean difference −8.7) or FT-CMR (r=0.30, p=0.2, mean difference −9.0). There was good correlation (r=0.70, p=0.002, mean difference 1.3%) between RT-VTTE and FT-CMR for LS. An example is shown in the Figure.
Automated voxel myocardial strain imaging by RT-VTTE shows good correlation with both tagged-CMR and FT-CMR for CS and LS. Voxel rotational mechanics may require precise slice matching between RT-VTTE and CMR for accuracy and/or direct comparison with 3-D CMR to verify accuracy.
Moderated Poster Contributions
Poster Sessions, Expo North
Saturday, March 09, 2013, 3:45 p.m.-4:30 p.m.
Session Title: Imaging: 3D Echocardiography
Abstract Category: 18. Imaging: Echo
Presentation Number: 1180M-336
- 2013 American College of Cardiology Foundation