The Study of the Function and Thrombus of Left Atrium Appendage in Patients with Nonvalvalar Atrial Fibrillation by Transesophageal Echocardiography

Objective To explore the correlation between the shape and function of left atrium appendage(LAA) and thrombus formation in patients with atrial fibrillation(Af) by transesophageal echocardiography(TEE).Methods The length,diameter,volume,peaking ejection velocity(Pev) were measured with TEE in patients with Af,and detected the thrombus or not in LAA.Results 7 patients had thrombus in LAA.All patients with Af were divided into 6 groups according to with or without Hypertension or Thrombus and duration of history,Compared with control group,every indice has satistically significantly in all patients with Af,all indices had satistically significantly(P0.05) in patients between with and without hypertension.The Volume of LAA in patients that Af history is more than 5 years had satistically significantly(P0.05).The Pev and ejection fraction(Ef) of LAA had satistically significantly in patients between with and without thrombus(P0.05).Conclusion The thrombus formation is relation to the dilation,dysfunction and lower peak of flow velocity of LAA.The assessment of function LAA in patients with Af by TEE can help to indentify the risk of thrombus formation and guid optimal treatment.