|
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 ,1st 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 | 
