| ObjectivesInvestigating the qualitative evaluation the effects of atrial fibrillation on the atrialfunction by the velocity vector imaging (VVI) technology.MethodsVelocity Vector Imaging (VVI) real-time myocardial motion tracking technology wereused in35cases with idiopathic atrial fibrillation and47healthy volunteers with sinusrhythm, combined with the Electrocardiogram to observe the difference of the movementof atrial muscle. Analysizing and comparing the data of the two groups by the χ2test.ResultsIn the47healthy volunteers with sinus rhythm,VVI showed that the atrial musclemovement was eccentric in the end systole. concentric in the early diastole. concentric inthe end diastole. In the35cases with atrial fibrillation, VVI showed that the atrial musclemovement was eccentric in the end systole. concentric in the early diastole. concentricmovement disappeared in the later diastole. The difference of the movement of atrialmuscle in the later diastole between two groups had statistic difference（P＜0.01）.After theatrial fibrillation was converted the sinus rhythm, the atrial movement returned concentric.ConclusionsThe velocity vector imaging (VVI) technology can display the atrial musclemovement type, evaluating the left atrial function, including displacement movement,direction, range.VVI showed the disappearing of the atrial muscle movement in the casewith atrial fibrillation, which can be used to diagnose atrial fibrillation when ECG is notobvious. We can understand the left atrial function recovery time of atrial fibrillationafter conversion. |
