Fatkin D, Feneley M
Cardiology Department, St Vincent's Hospital, Sydney, New South Wales, Australia.
Prog Cardiovasc Dis. 1996 Jul-Aug;39(1):57-68. doi: 10.1016/s0033-0620(96)80041-7.
The role of transesophageal echocardiography (TEE) in thromboembolic risk stratification in atrial fibrillation (AF) has not been established. Left atrial appendage contractile dysfunction in patients with AF predisposes to thrombus formation. The extent of blood stasis and propensity for thrombus can be assessed during TEE by measurement of the peak Doppler velocity of blood outflow from the appendage. Spontaneous echocardiographic contrast (SEC) is a swirling pattern of blood echogenicity that may be detected by TEE in the left atrium in patients with AF. The presence of SEC reflects left atrial blood stasis and a prothrombotic state. SEC is associated with an increased risk of systemic thromboembolic events. Parameters derived from TEE may provide additional prognostic data to clinical history and transthoracic echocardiography in thromboembolic risk stratification in AF.
经食管超声心动图（TEE）在心房颤动（AF）血栓栓塞风险分层中的作用尚未明确。AF患者的左心耳收缩功能障碍易导致血栓形成。在TEE检查期间，可通过测量心耳血液流出的峰值多普勒速度来评估血液淤滞程度和血栓形成倾向。自发超声心动图造影（SEC）是一种血液回声的漩涡状模式，TEE检查时可在AF患者的左心房中检测到。SEC的存在反映了左心房血液淤滞和血栓前状态。SEC与全身血栓栓塞事件风险增加相关。源自TEE的参数可为AF血栓栓塞风险分层中的临床病史和经胸超声心动图提供额外的预后数据。
