Objective:To evaluate the role of transesophageal echocardiography(TEE) combined with X-ray fluoroscopy in guiding percutaneous balloon mitral valvotomy(PBMV).

• 目的：研究经食管超声(TEE)结合X线实时引导经皮二尖瓣球囊扩张术(PBMV)的价值。