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一、超声心动图1.体表超声心动图负荷超声法在欧美已成为诊断缺血性心脏病的常规,特别是多巴酚丁胺负荷超声法。与铊心肌扫描相比,特异性强且安全。它有助于判断扩张型心肌病与室壁运动异常的疾病是否伴有冠脉病变。心肌超声对比法是从静脉注入稳定的微小气泡,对比动态变化评价左右室功能,注入冠脉可确定缺血区、评价侧枝循环等。非风湿性二尖瓣关闭不全的瓣膜成形术,其术中合并症,晚期死亡率,血栓栓塞的发生率均比瓣膜置换术优越,故瓣膜成形术在逐年增加。高桥等术前应用超声心动图,根据瓣膜的厚度、辉度以及从舒张期膨隆度确定瓣尖的力学强度,判断瓣膜有无纤维变性,以选择瓣膜成形术的适应证。
First, the echocardiography 1. Surface echocardiography load ultrasound in Europe and the United States has become the diagnosis of ischemic heart disease routine, especially dobutamine stress ultrasound. Compared with thallium myocardial scan, specificity and safety. It helps to determine whether dilated cardiomyopathy and wall abnormalities are associated with coronary artery disease. Myocardial contrast method is from the intravenous injection of stable small bubbles, dynamic contrast assessment of left and right ventricular function, into the coronary artery to determine the ischemic area, evaluation of collateral circulation. Non-rheumatic mitral regurgitation of valvuloplasty, its intraoperative complications, late mortality, the incidence of thromboembolism than valvular replacement superior, so valvuloplasty increased year by year. Takahashi and other preoperative echocardiography, according to the thickness of the valve, the brightness and from the diastolic expansion of the mechanical strength of the cusp to determine the presence or absence of fibrous fibrosis, to select indications for valvuloplasty.