1Li YH,Hwang J J,Lin JJ,et al.lmportance of left atrial appendage function as a risk factor for systemic thromboembolism in patients with rheumatic mitral valve disease.Am J Cardiol,1996;78(7):844~847
2Manning WJ,Weintraub RM,WaKsmonski CA,et al.Accuracy of transesophageal echocardiography for identifying left atrial thrombi.Ann Intern Med,1995; 123 (11):817~ 822
3Toyoda k, Kasaka M, Nagata S, et al. Transesophageal echocardiography for detecting intracardiac thrombi in embolic stroke. Angiology, 1993, 44: 376-383.
4Omran H, Jung W, Rabahien R, et al. Imaging of thrombi and assessment of left atrial appendage function: a prospective study comparing transthoracic and transesophageal echocardiography. Heart, 1999, 81: 192-198.
5Takahiro OTA, Damian MC, Joseph K.Influence of ultrasonic machine settings, transducer frequency and placement of region of interest on the measurement of integrated backscatter and cyclic variation[J].Ultrasound in Med & Biol,1997,23:1059-1070.