摘要
Objectives The purpose of this study was to evaluate the reliability of the pr essure half-time(PHT) method for estimating mitral valve areas(MVAs) by velocit y-encoded cardiovascular magnetic resonance(VE-CMR) and to compare the method with paired Doppler ultrasound. Background The pressure halftime Doppler echocar diography method is a practical technique for clinical evaluation of mitral sten osis. As CMR continues evolving as a routine clinical tool, its use for estimati ng MVA requires thorough evaluation. Methods Seventeen patients with mitral sten osis underwent echocardiography and CMR. Using VE-CMR, MVA was estimated by PHT method. Additionally, peak E and peak A velocities were defined. Interobserver repeatability of VE-CMR was evaluated. Results By Doppler, MVAs ranged from 0.8 7 to 4.49 cm2; by CMR, 0.91 to 2.70 cm2, correlating well between modalities (r= 0.86). The correlation coefficient for peak E and peak A between modalities was 0.81 and 0.89, respectively. Velocity-encoded CMR data analysis provided robust , repeatable estimates of peak E, peak A, and MVA (r=0.99, 0.99, and 0.96, respe ctively). Conclusions Velocity-encoded cardiovascular magnetic resonance can be used routinely as a robust tool to quantify MVA via mitral flow velocity analys is with PHT method.
Objectives The purpose of this study was to evaluate the reliability of the pr essure half-time(PHT) method for estimating mitral valve areas(MVAs) by velocit y-encoded cardiovascular magnetic resonance(VE-CMR) and to compare the method with paired Doppler ultrasound. Background The pressure halftime Doppler echocar diography method is a practical technique for clinical evaluation of mitral sten osis. As CMR continues evolving as a routine clinical tool, its use for estimati ng MVA requires thorough evaluation. Methods Seventeen patients with mitral sten osis underwent echocardiography and CMR. Using VE-CMR, MVA was estimated by PHT method. Additionally, peak E and peak A velocities were defined. Interobserver repeatability of VE-CMR was evaluated. Results By Doppler, MVAs ranged from 0.8 7 to 4.49 cm2; by CMR, 0.91 to 2.70 cm2, correlating well between modalities (r= 0.86). The correlation coefficient for peak E and peak A between modalities was 0.81 and 0.89, respectively. Velocity-encoded CMR data analysis provided robust , repeatable estimates of peak E, peak A, and MVA (r=0.99, 0.99, and 0.96, respe ctively). Conclusions Velocity-encoded cardiovascular magnetic resonance can be used routinely as a robust tool to quantify MVA via mitral flow velocity analys is with PHT method.
