Doppler Color Echocardiographic Observation of Left Atrial Systolic Function Following Conversion of Atrial Fibrillation in Patients<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

肖竹影　吴长君　薛莉

哈尔滨医科大学第一临床医院超声科，黑龙江 哈尔滨  150001；

哈尔滨医科大学第三临床医院影像科

Xiao Zhuying ,Wu Changjun ,Xue Li

Department of Echocardigraphy ,1^st Clinical College of Harbin Medical University (Harbin 150001

Abstract

Objective：To observe the restoration of left atrial systolic function after electrical conversion of atrial fibrillation .

Method：In 20 patients with atrial fibrillation ,Doppler color echocardiographic examination was performed to measure A peak flow rate using diastolic blood flow frequency spectrum at the mitral orifice ,1 h ,24 h ,2 and 4 weeks after conversion of atrial fibrillation to sinus rhthm.

Result：The A peak flow rate increased from 0.30±0.10m／s at 1h to 0.62±0.14m／s at 4 weeks after conversion in 15 cases (P＜0.001); returned to normal and becamme more rapid than E peak flow rate in 2 cases . A peak did not appear within 4 weeks after conversion in one case .Atrial fibrillation recurred one week after conversion in the remaining two cases ,with A peak absent in one case and A peak being low , small and unchanged with time in the other .

Conclusion：Appropriate anticoagulant therapy should be used following conversion in consideration of a highly possible depression of the left atrial mechanical function after clinical electrical conversion of atrial fibrillation .

Key words：Doppler color echocardiogram   Atrial fibrillation   Electrical conversion   Left atrial systolic function