Assessment of Systemic Right Ventricular Function in Patients With Transposition of the Great Arteries Using the Myocardial Performance Index: Comparison With Cardiac Magnetic Resonance Imaging
Assessment of Systemic Right Ventricular Function in Patients With Transposition of the Great Arteries Using the Myocardial Performance Index: Comparison With Cardiac Magnetic Resonance Imaging
复制标题
使用心肌性能指数评估大动脉转位患者的全身右心室功能：与心脏磁共振成像的比较
DOI：
10.1161/01.cir.0000147284.54140.73
复制
发表时间：
2004
期刊：
影响因子：
37.8
通讯作者：
J. Therrien
中科院分区：
文献类型：
--
作者：
O. Salehian;M. Schwerzmann;N. Merchant;G. Webb;S. Siu;J. Therrien
Background—Assessment of systemic right ventricular (RV) function is a key point in the follow-up of patients with transposition of the great arteries (TGA). Current echocardiographic assessment of RV function is at best an estimate, and cardiac magnetic resonance (CMR) is considered the gold standard. However, this technique is expensive, has limited availability, and requires significant expertise to acquire and interpret the images. The myocardial performance index (MPI) has recently been studied for assessment of pulmonary RV function and shows promise as a simple yet powerful tool for assessing patients with RV dysfunction of various origins. We set out to compare MPI and CMR assessment of systemic RV function in patients with TGA. Methods and Results—Data from patients with TGA (11 with congenitally corrected TGA, 18 with surgically corrected TGA) who had CMR within 6 months of their echocardiogram were reviewed. The average systemic RV ejection fraction (RVEF) by CMR was 39.4±11.4%, and the systemic RVMPI for this group was 0.56±0.21. There was a strong negative correlation between the systemic RVMPI and systemic RVEF by CMR (r=−0.82, P<0.01). The systemic RVEF can be estimated from this formula: RVEF=65%−(45.2×MPI). Conclusions—MPI can be used in patients with systemic RVs to assess global function and to estimate an EF with good accuracy.
