The Effect of Transient Balloon Occlusion of the Mitral Orifice on Left Atrial Appendage Blood Flow Velocity and Spontaneous Echo Contrast是什麼意思_The Effect of Transient Balloon Occlusion of the Mitral Orifice on Left Atrial Appendage Blood Flow Velocity and Spontaneous Echo Contrast在線翻譯_英語_讀音_用法_例句